Saunamo Commercial Guide: Sauna and Cold Plunge Design for Resorts, Gyms and Wellness Spaces

Introduction

In Europe's wellbeing circles, the ancient pairing of intense heat and bracing cold is back in favour. Luxury hotels, resorts and gyms across the EU are discovering that combining a sauna with a cold plunge is more than a health fad — it is a memorable ritual that can set a property apart. This practice of contrast therapy (alternating hot and cold) has deep roots in Nordic and Baltic culture, from Finnish families who plunge into icy lakes after a 100 °C sauna to Estonians who declare «Laupäev on saunapäev» (Saturday is sauna day) and roll in the snow. What is new is the way hospitality brands are turning this hot-cold tradition into a signature guest experience. A well-designed sauna + cold plunge circuit can delight wellbeing tourists in search of authentic rejuvenation, give fitness-minded guests an inventive recovery ritual, and offer hotels a marketable point of difference. Crucially, the focus goes beyond the health benefits — it is about the experience: the drama of the temperature swing, the feeling of luxury and challenge, the story guests share afterwards. In this article, we explore why hot-cold contrast therapy is gaining ground, how to integrate saunas and cold plunges into different hospitality settings, and how the pairing can lift guest satisfaction and business return on investment. We also cover practical design tips (layout, flow, zoning) and operational considerations — from maintenance to safety — so your thermal facilities not only impress guests but run smoothly too.

Let's dive into the rising trend of sauna and cold plunge experiences and see how they can turn a standard spa amenity into an unforgettable journey for your guests.

The rise of hot-cold wellbeing experiences in hospitality

Guests cooling off outside a traditional smoke sauna in Estonia. The hot-cold contrast bath — a time-honoured Nordic and Baltic ritual — is now a sought-after wellbeing experience, embraced by hotels and spas across Europe.

Not so long ago, if a traveller wanted the thrill of the cold after a good sweat session, they would have had to head to the edge of a Finnish lake or a Russian banya. Today, you are just as likely to find a cold plunge pool next to a sauna at a smart surf resort in Portugal or a boutique hotel in France. The age-old practice of contrast bathing — warming up in dry heat then dipping into the cold — has captured the contemporary wellbeing zeitgeist. In fact, 76% of wellbeing travellers report interest in hot/cold contrast therapy experiences when choosing their holidays. According to Condé Nast, it has become the biggest wellbeing trend of 2025, fuelled by mobile saunas appearing at wild swimming spots and by figures such as «Iceman» Wim Hof. The old Nordic ritual of heat and cold has moved from niche to mainstream.

Europe is at the heart of this trend. The fact that the region has such a strong, deep-rooted sauna culture certainly helps. Finland alone has three million saunas for 5.5 million people — roughly one sauna per family — and plunging into an icy lake or a snowdrift after the sauna is considered a «deliciously relaxing» national tradition. As the Finnish Sauna Society notes, there is literally «one facility for every two people or so» in Finland devoted to this ritual. Estonia, Sweden and other Baltic and Nordic countries share similar customs; in Estonia, many saunas are built right by rivers or the sea so you can «dip into the water to cool down» or cut a hole in the winter ice for a quick swim. This intuitive pairing of extremes — hot «loyly» steam and cold water — has been treasured for generations for the way it makes people feel alive and renewed. Now that same natural high is being shaped into a luxury experience for travellers from all over the world.

Several factors explain why contrast therapy is in vogue with wellbeing tourists and fitness-minded guests. First, today's travellers want more than a massage — they crave immersive, memorable experiences. Wellbeing tourists are high-value guests (they spend 41% more per trip than the average traveller) and actively seek meaningful rituals such as thermal bathing circuits, forest bathing or local spa traditions. Alternating sauna and cold plunge gives them exactly the kind of transformative, story-worthy ritual that wellbeing enthusiasts love. It is a sensory journey with a beginning (gentle warmth), a middle (deep sweat), a dramatic climax (the gasp-inducing cold) and a happy resolution (the euphoric calm afterwards). Guests leave feeling they have achieved something — not just a treat, but a personal challenge met. As one first-timer described after a guided aufguss sauna session in London: «I loved the feeling of losing myself... it's 15 minutes of stepping away from normal life...». That emotional high, and sharing an emotional experience with others, is the kind of thing that lodges in memory.

Second, contrast therapy hits several wellbeing trends at once. It is about recovery and performance (athletes use cold plunges and saunas to ease soreness and improve circulation), it is about mental health (extreme sensations force mindfulness and stress release) and it is increasingly social (often done in groups or community settings). For younger travellers and city dwellers especially, hot-cold circuits offer a healthier kind of fun than nightlife. The UK, for instance, is in the middle of a sauna renaissance: community sauna baths and pop-up ice plunge venues more than tripled in the last two years, as people in their twenties and thirties look for alternatives to pub culture. Many of these new venues lean explicitly into community and "experience" — think DJ sauna sessions, sauna and poetry evenings, or theatrical guided aufguss rituals with aromatherapy and "sauna masters" waving towels. Crucially, almost all of them include a cold element. As the Associated Press noted, "many venues offer outdoor ice baths next to the saunas so people can alternate between hot and cold", which makes the outing far more thrilling than a solitary steam. The contrast-therapy boom is as much about fun and novelty as it is about wellbeing. It is energising, shareable and inclusive — anyone can bond over the shrieks of an ice plunge, regardless of fitness level.

Finally, you cannot ignore the European wellbeing tourism boom driving hospitality interest in these amenities. Post-pandemic, travellers are putting wellbeing first, and Europe recorded 328 million wellbeing trips in 2023, with strong growth forecast. Properties that stand out with authentic wellbeing offers can tap into that demand. Contrast therapy has become a sort of calling card for Europe's wellbeing destinations — from Iceland's geothermal "fire and ice" pools to Sweden's Arctic spas under the northern lights. A destination management survey found that marketing «ice baths and traditional saunas» as part of Nordic experiences makes them especially appealing to wellbeing travellers. Even outside the Nordic region, forward-thinking hotels are adding a hot-cold feature because it signals "leading-edge wellbeing". Condé Nast Traveler joked that cold plunge pools and snow rooms are now popular "companions" to heated spa experiences worldwide. In other words, a sauna on its own is good — but a sauna with an ice plunge is seen as the complete, modern wellbeing package.

For hospitality decision-makers, the message is clear: offering a sauna and cold plunge pairing is more than a spa upgrade, it is a commercial move that responds to the trends. Next, we look at how to bring the hot-cold experience to life across different property types, with a layout and flow that maximise guest enjoyment.

Designing a signature sauna + cold plunge circuit

Creating a compelling sauna and cold plunge experience takes more than buying the equipment — it is about thoughtful design and integration. Guests should be able to move from one element to the next safely, conveniently, and even theatrically. Here, we share practical guidance on how to weave a hot-cold circuit into different hospitality settings (from large resorts to compact gyms), with layout tips, space considerations and design touches that lift the experience.

Wellbeing resorts and destination spas

For destination spas, wellbeing spaces and luxury resorts, a sauna + cold plunge circuit can become a hero attraction — essentially a "thermal adventure" that anchors your spa menu. These larger properties usually have the advantage of space, so you can design a dedicated thermal zone with multiple features. A typical layout might include: a high-temperature sauna (or even a range of heat rooms — Finnish sauna, steam room, perhaps a herbal sauna), directly next to a cold experience (cold plunge pool, ice fountain or cold shower), plus relaxation areas in between for resting.

Flow is everything: guests should move from heat to cold to rest, and repeat as they wish, without ever feeling uncomfortable or exposed. In a resort setting, consider creating a circuit: for example, a sauna cabin opening onto an outdoor cold plunge pool or immersion tub (for that bracing "cold-in-the-open-air" effect), then on to a quiet lounge with heated loungers or a fireplace to warm up. Zoning the area to separate the "hot", "cold" and "rest" zones helps preserve comfort — you do not want cold draughts hitting people in the sauna, and you want a dry zone where guests can dry off and relax without wet swimwear. Many luxury spas place the cold plunge pool just steps from the sauna door, often in a visually striking way (like a stone-edged plunge pool or a waterfall tub) to tempt guests to take the leap. The famous Nordic Spa at the Grand Hôtel Stockholm, for example, has a «cold-water pool for a refreshing dip after the sauna» right beside its sauna, echoing the Swedish archipelago tradition.

Resorts should also lean into the natural setting wherever possible. If you are in a mountain or lakeside location, place the sauna and plunge outdoors or with a view, turning the hot-cold practice into an immersive nature ritual. Guests can move from a wood-burning lakeside sauna to a dip in the lake itself (with proper safety supervision) or, at the very least, enjoy a cold plunge on an outdoor deck with fresh air and a view. That authenticity adds enormous value — wellbeing travellers will go home raving about the "real thing", rather than a routine indoor spa session. Even at resorts without natural cold water, outdoor snow rooms or ice fountains can simulate the effect. (Snow rooms — refrigerated chambers that produce powdery ice crystals — are an emerging amenity at alpine spas, giving guests the thrilling option of rolling in the snow between sauna sessions.) Whether indoors or out, design with materials and themes that evoke the hot-cold contrast: warm wood and soft lighting in the sauna chamber, then stone, icy blue mosaics or stainless steel around the cold plunge to psychologically signal the "cool" zone. The transition should feel like an adventure — perhaps a narrow passage or doorway revealing the cold plunge, adding a touch of surprise.

Beyond that, high-capacity wellbeing facilities can build in staff-led rituals and enhancements to turn the circuit into a real event. In Europe, many spas schedule aufguss sessions (where a sauna master infuses water and essential oils onto the hot stones and waves the warm air over guests, often choreographed to music). After an aufguss, taking participants straight into a group plunge or a crushed-ice rub can become a dramatic shared moment. Resorts can brand these ceremonies as exclusive — for example, «Sunrise Fire and Ice Ritual» — and charge for them or include them for spa pass holders. The aim is to lift a simple hot-cold cycle into something almost spiritual, certainly memorable. Keep capacity and supervision in mind: if larger groups will do contrast therapy together, make sure the cold plunge is sized appropriately (or consider several plunge tubs or a small cold pool). A rule of thumb from hydrotherapy specialists is that a cold plunge pool should be around 1.5 m deep and chilled to about 5–18 °C for full effect. In practice, 12–15 °C tends to be the sweet spot — invigorating yet bearable for most guests. Remember too that, after intense heat, guests need a calm space to bring their body temperature back to normal; at least a few minutes of rest is recommended before another hot session. So include a relaxation room or quiet zone with water, herbal tea and perhaps warm blankets — this not only follows best health practice, it also extends the guest's stay (meaning more time in your spa, perhaps ordering a smoothie or enjoying the view, all of which helps ancillary revenue).

Boutique hotels and retreats

Smaller hotels and boutique retreats often have limited space and budget for wellbeing amenities — but that does not mean they cannot offer a fantastic sauna and plunge experience. In fact, a compact, well-executed hot-cold corner can become a guest favourite and a marketing highlight for the property. The trick is to be creative with design and placement. For example, if interior space is tight, consider an outdoor sauna cabin.

When planning a sauna + plunge for a boutique setting, think about guest flow from the rooms or shared areas. If the units are outdoors, make sure there is a convenient path and that guests have privacy (screens, fences or planting can shelter the area, since people will be in swimwear or less). Ideally, provide a small changing area or, at the very least, hooks, towels and perhaps robes to hand. A clever idea is to weave the hot-cold setup into a spa suite or bookable private experience. For example, a luxury chalet might advertise a private terrace with a two-person sauna and a chilled plunge tub exclusively for the suite's guests — a strong draw for couples and wellbeing travellers. Even a city boutique hotel can dedicate part of the rooftop or courtyard to a small sauna cabin and a cold shower or plunge barrel, available by booking to guests (or offered as part of a spa package). This not only makes the most of underused outdoor space, it also creates a "wow moment" that guests will post about. There is something undeniably Instagrammable about stepping out of a small sauna cabin on a winter evening, steam rising, and dropping into a cold plunge tub under the stars.

From a design point of view, in tight spaces, opt for vertical solutions: a plunge tub does not need to be wide, just deep enough to immerse in (many cold plunge tubs are essentially deep tubs that take up only a few square metres). Make sure flooring is non-slip and drainage is generous — water will splash.

Boutique operators should also think about atmosphere and theme. A small space can feel luxurious and special through materials (aromatic cedar wood for the sauna, natural stone tiles around the plunge), lighting (soft, dimmable lights inside the sauna; perhaps coloured LED lighting in the plunge for a cool glow) and small touches like eucalyptus oil in the cold water or a bowl of crushed ice that guests can rub on the skin. Even if you cannot offer dozens of facilities, offering a distinctive ritual will set you apart. Provide instructions or even a guided script — a simple framed card describing "How to enjoy the hot/cold circuit: Step 1..." can help guests, especially those new to contrast therapy, get the most out of it. Lean into the local angle where you can: for example, «Experience the Finnish sauna tradition — enjoy 10 minutes in our 85 °C sauna, then a quick plunge into a 12 °C ice bath, repeat twice for a true Nordic refresh». Mention any cultural links (if your region has a bathing tradition). In doing so, you turn a small amenity into an experiential story.

Finally, manage expectations around capacity and bookings. A single sauna cabin holds at most 4 to 6 people, and a cold plunge tub holds one person at a time (or two if larger). Decide whether this will be a shared facility (first-come, first-served, during spa hours) or a private experience that can be booked at set times. Many boutique hotels go for private slots for these features, so each group of guests has an exclusive, unhurried experience — which can justify an extra fee or higher room rates. It also avoids crowding and gives staff time to tidy up, top up the ice and so on. Communal use can work too if you have an honour system and perhaps a sign indicating maximum use times. Either way, cleanliness and upkeep are critical in small facilities; we cover maintenance later, but be ready to check water quality and temperature between uses to keep it clean and at the right temperature.

Gyms, fitness clubs and urban spas

In fitness and wellbeing centres — whether independent or as hotel amenities — the sauna and cold plunge combination is becoming the recovery zone of choice. Sports science has popularised contrast bathing for post-workout recovery, so gyms are an ideal place to deploy it. In fact, the inclusion of "recovery suites" with cold plunge tubs in high-end fitness clubs has grown by around 15% year on year worldwide, reflecting how important this trend is for member acquisition. If you run a hotel gym or a boutique fitness club, adding a sauna and cold plunge area can meaningfully strengthen your value proposition for health-minded clients.

For integration into a gym setting, a common approach is to place the sauna and cold plunge near the changing rooms and showers, or next to the gym floor if space allows. Members usually want to walk straight in after a workout. Key design considerations here include throughput and hygiene — unlike a spa, where guests linger, gym users may move through more quickly, so plan for hard-wearing, easy-to-clean materials. A robust fibreglass cold plunge pool, such as the Avantopool Kinos Plus, is a strong option for a commercial environment.

A cold plunge pool is essentially a small pool and must be filtered or treated to high hygiene standards. Many gyms choose freestanding fibreglass plunge tubs that circulate and filter the water continuously — these are easier to install in a space than building an in-ground pool.

From a layout point of view, make sure there is a logical flow: perhaps "Hot sauna -> Shower -> Cold plunge -> Towels". It is wise to put an open shower or at least a hose near the plunge so people can quickly rinse off sweat before entering the cold water (which helps keep the water cleaner). Non-slip mats or textured flooring around the plunge are essential, since users will be wet and possibly light-headed after training. Think too about visibility and social comfort: some gym members might feel intimidated by the cold plunge, so a measure of privacy (say, the plunge not sitting in the centre of the changing room where everyone can see) can encourage use. On the other hand, a visible location with good signage can spark curiosity and normalise the practice ("Don't forget to try our cold plunge after the sauna or your workout — for muscle recovery and mood.").

Given that gym users may use the facilities more routinely, think about how to keep the experience engaging. You might introduce a recommended cool-down circuit: for example, a sign suggesting "Contrast therapy protocol: 10 minutes of sauna at 80 °C, then 30 seconds in 10 °C plunge, repeat 2–3 times" so people have guidance. Some clubs go further and include guided contrast therapy sessions — for instance, a coach can lead a small group through breathing exercises in the sauna and timed plunges. F45 Training, the global fitness franchise, recently announced the addition of cold plunge tubs and infrared saunas in their studios as part of recovery programming, showing that even structured training classes now recognise the value of hot-cold therapy.

One more design point: scalability and redundancy. If your gym is large or has separate facilities for men and women, you will need enough saunas and plunges to serve each. Some luxury clubs offer a sauna and plunge in each changing room (for privacy and modesty), while others have a unisex thermal area. The Nordic Spa at the Grand Hotel in Stockholm, for example, has saunas and cold plunge pools in both the men's and women's wet areas for contrast therapy. Smaller hotel gyms may have only a unisex sauna and a single plunge tub — which is fine, but think about how to schedule, or whether signage should ask users to wear swimwear when mixed groups are present. Always plan for downtime for maintenance: if you only have one cold plunge and it needs cleaning or mechanical repair, do you have a cold-shower alternative so guests can still get the cold exposure? It is worth having a Plan B (even if it is just a large wheeled bucket of ice for manual cold-water splashes in an emergency).

In short, designing a gym or urban spa means weaving contrast therapy into the existing guest routine: make it convenient, sign it clearly, and build it for frequent use. Done well, it can become a major draw. Many membership-based clubs report that a single distinctive wellbeing feature, such as a cold plunge, sets them apart from competitors and builds member loyalty. Once you are used to the post-workout endorphin rush of a hot-cold circuit, you will go out of your way to visit the facilities that offer it.

The guest experience: rituals, luxury and shareability

Why does sauna and cold plunge together create such a signature guest experience? The answer lies in the power of ritual and the appeal of extremes. For many guests, especially those travelling for wellbeing or adventure, the hot-cold circuit becomes more than a spa service — it is almost a personal rite of passage during their stay, something they will tell friends about or post on social media. Let's break down the elements that make the experience so impactful and how, as an operator, you can amplify them.

1. It is a multisensory ritual: using a sauna or taking a cold plunge on its own is already beneficial, but combining the two amplifies the sensory journey. Guests move from dry heat (tingling skin, muscles relaxing, woody aroma in the air) to shocking cold (gasping breath, racing heart, icy water enveloping the skin) and then into a serene, calm state as the body floods with endorphins and warmth returns. That rhythmic transition, repeated in cycles, creates a kind of meditative trance. In an age of constant digital distraction, this physical ritual is deeply memorable. «In an era of constant connectivity and digital overload, the rhythmic transition between heat and cold offers a rare chance to quiet a busy mind», writes one wellbeing specialist. In fact, when you are focused on breathing during an ice plunge, it is «impossible to think about anything other than your breath», making it «mindfulness made physical». By framing the sauna + plunge as a guided ritual, you tap into guests' desire for meaningful experiences. Small additions reinforce this: offering a specific sequence (for example, starting with a footbath or warm shower and ending with a tea ceremony) or having a staff member introduce a traditional practice (such as a Finnish birch vihta in the sauna, or a bell to ring before the plunge as a sign of "courage"). Touches like these give the experience structure and a sense of authenticity. Many European traditions treat the sauna as an almost spiritual cleanse — share part of that story with your guests (through spa menu descriptions or signage) and they will see the routine as a highlight of their stay rather than just a casual amenity.

2. Perceived luxury and wellbeing prestige: there is an inherent luxury factor in offering a thermal circuit. For decades, contrast hydrotherapy was found mainly at high-end spa resorts or exclusive bathing houses. Now that it is in fashion, guests still associate the availability of a sauna and cold plunge with a luxurious, full-service spa. It signals that the hotel or gym has invested in a complete wellbeing experience, not just a token sauna. The Global Wellbeing Institute notes that, in real estate and hospitality, features such as thermal contrast circuits and circadian lighting are now seen as essential and command premium pricing. In hospitality specifically, integrating wellbeing at this level can lift average daily rates and overall guest spend. So when guests see a cold plunge next to the sauna, they immediately register that "this place has it all". Many will try it simply because it is there and feels exclusive. There is also a touch of social signalling involved: plunging into icy water is not for the faint-hearted, so those who do feel a sense of accomplishment and even status ("I dipped into the cold plunge — have you tried it?" becomes a talking point between guests). For fitness-minded travellers, having access to a contrast bathing routine is a marker of a serious wellbeing facility. Hotels can lean on this by gently promoting that their spa offers a «signature hot/cold circuit» or a «Nordic spa experience». These phrases evoke luxury and tradition. Some properties give their sauna + plunge area its own name (for example, "Fire and Ice Suite" or "Nordic Bathing Zone") to set it apart. This not only helps marketing, it also invites guests to see it as a destination within the hotel. They might book a specific time to use it, just as they would for a massage. All of this lifts the perceived value of the stay.

From the guest's point of view, luxury also lies in the sense of renewal they get. Unlike a simple hot-tub soak, the hot-cold ritual tends to leave people with a lasting glow — rosy cheeks, refreshed yet relaxed. Many say it improves their sleep that night or eases jet lag and the like. When guests feel tangible benefits, they are far more likely to score their experience highly in satisfaction surveys and reviews. A hotel spa can therefore receive enthusiastic reviews not only for massages but also for "a wonderful sauna and ice plunge that left me feeling like new". This kind of organic, positive word-of-mouth is gold.

3. Social bonding and shareability: a perhaps unexpected aspect of contrast therapy experiences is the way they bring people closer. A certain camaraderie forms when strangers or friends take on the challenge of extreme temperatures side by side. "People are drawn to the way it builds community... these experiences have a way of breaking down barriers," notes one journalist, observing that the shared challenge "creates instant camaraderie". Picture a group of hotel guests who did not know each other, all sitting in a sauna during a guided multisensory aufguss ritual, then cheering each other on as they plunge into the cold pool — by the end, they are talking and laughing like old friends in the relaxation area. For hotels that want to cultivate a lively, welcoming atmosphere (like wellbeing spaces or social hostels), this is a strong asset. Even at quieter luxury resorts, couples or families travelling together will bond over the ritual ("Remember how mum shrieked when she hit the cold water?").

Crucially, in the age of Instagram and TikTok, the hot-cold circuit is eminently shareable content. Guests love to document their brave plunge or the beautiful design of their sauna. A picture-perfect setup — a cedar sauna cabin against a snowy landscape, or a smart cold plunge with mosaic tiles — will appear in plenty of selfies. This user-generated content acts as free marketing, showing off your property's unique amenities. Some hotels gently encourage sharing by making the space visually striking (dramatic lighting, signage with the hotel's hashtag on a chalkboard near the plunge, and so on). The trick is to keep it authentic — people can tell when something is staged. But given the photogenic nature of steam and water, the space almost markets itself. A quick scan of social media reveals countless posts of travellers emerging triumphantly from icy water or relaxing in design-led saunas. As one travel writer put it, «It's exhilarating... you're sharing an experience with other people», and that warmth and enthusiasm is something people naturally want to share. Even those who do not post photos will talk about it: distinctive experiences = stories, and stories are told both in person and on platforms like TripAdvisor, lifting your property's reputation.

4. Weave in local culture and wellbeing rituals: to really stand out, frame your sauna and plunge offer as a unique, culturally rich ritual of your brand or location. For example, a hotel in Lapland might invoke the Finnish sauna tradition (perhaps offering guests a shot of cloudberry juice after the plunge, or teaching them a Finnish word like «sisu», meaning resilience — a playful link to the cold plunge). Other resorts might highlight the UNESCO-listed smoke sauna tradition: explain that, historically, Nordic peoples used extreme heat and icy cooling to "cleanse body and spirit", and perhaps offer herbal scrubs or sauna whisks during the session. At a modern urban hotel, you can lean more on wellbeing science and trend perspective: mention how elite athletes or celebrities use contrast therapy for vitality, so guests feel they are trying something cutting-edge and exclusive. Match the story to your audience — but do tell a story. It lifts the experience from a mechanical act (heat, then cold) into something almost ceremonial.

In short, the guest experience of a sauna + cold plunge circuit is powerful because it ticks so many boxes: it is viscerally enjoyable (and challenging), rooted in tradition yet on-trend, relaxing yet thrilling, solitary yet social. By cultivating these aspects — through thoughtful detail, cultural context and a nudge to share — hospitality providers can turn a simple facility into a signature attraction.

Commercial benefits and ROI: from guest satisfaction to marketability

Integrating a combined sauna and cold plunge offer is not only a wellbeing decision — it is a strategic commercial one. Let's look at the business case: how does this amenity generate returns for hotels, resorts and wellbeing operators? We examine the impact on guest satisfaction and reviews, revenue opportunities such as upsells and packages, competitive differentiation, and even potential ROI metrics from industry research.

Higher guest satisfaction and loyalty: guests who use spa and wellbeing facilities tend to rate their stay more positively, and a distinctive feature like a hot-cold circuit can be a real win. Many travellers choose a hotel specifically because it offers unique wellbeing experiences, and once on the property they are more likely to be satisfied and return. According to Global Wellbeing Institute industry analysis, hotels that fully integrate wellbeing consistently outperform their peers — wellbeing-rich hotels enjoy stronger guest loyalty and a stronger brand. Specifically, properties with comprehensive wellbeing (including thermal facilities) enjoy higher average daily rates (ADR), occupancy, guest spend and repeat visits. This is logical: if a guest has an incredible, memorable experience doing contrast therapy at your spa, they are likely to come back the following year or pick your hotel over a competitor on the next trip. They will also tell others ("Oh, you have to stay there, they have an amazing sauna and ice bath"). In a time when online reviews can make or break bookings, these positive experiences translate into 5-star reviews and enthusiastic mentions. Even a quick scan of traveller reviews shows comments such as "the cold plunge after the sauna was the highlight of my stay", which can sway prospective guests reading reviews. Furthermore, by offering something not easily replicated at home (most people do not have a sauna and ice bath at home, although domestic installations are on the rise), you create distinct value for visiting your property.

Premium pricing and packaging: an immediate commercial benefit is pricing power. A unique facility, such as a contrast therapy circuit, lets you justify higher room rates or membership fees. It also enables upsell packages. For example, hotels can sell day spa passes to outside visitors specifically to use the thermal circuit, or create packages such as "Rejuvenation Retreat" that include a guided sauna and plunge ritual plus perhaps a massage, at a premium price. Analysts note that hydrotherapy and thermal facilities have a high impact on ROI despite their cost, because they enable premium pricing and entice guests to book wellbeing packages. Guests are willing to pay more for a room or day pass if they know they will have a special experience (much like how a hotel with a famous infinity pool draws non-residents to buy pool access). Moreover, if your sauna-plunge is iconic enough, it can attract local clientele: for example, local fitness enthusiasts paying for monthly spa memberships or community sauna evenings. This can become an extra revenue stream beyond in-house guests.

Another way to upsell is to offer guided sessions or classes for an extra fee. Some resorts run scheduled contrast therapy sessions (perhaps with a spa instructor or sauna master leading breathing exercises) — these can be offered at, say, €20 per guest for a 30-minute session, which feels reasonable for a "class" experience and uses the same facilities that would otherwise be free to use. In effect, you are monetising the experience. On a softer note, you can cross-sell related wellbeing items: perhaps your spa boutique sells cold plunge systems or sauna accessories, or simply branded robes and hats (the traditional sauna felt hat is a fun keepsake). As one hospitality consultant put it, "Combining wellbeing services can boost upsell efficiency." They cite examples such as offering a post-workout cold plunge after a personal training session, or pre-selling spa experiences as part of a booking package to generate extra revenue. So a gym could include a "cool-down contrast therapy" add-on for personal training clients (which boosts the appeal of the training session), or a hotel booking site might offer "Upgrade to include unlimited Spa Circuit access during your stay — only €X". All of these tactics use the sauna feature to lift revenue.

Higher spend and ancillary revenue: beyond direct fees, consider the indirect revenue a happy, relaxed guest generates. After a thermal session, many guests like to settle in and perhaps order a healthy smoothie, a fresh juice or a light snack — boosting food and beverage sales at the spa café or hotel bar. If you have a healthy fitness bar near the spa (as the Grand Hôtel Stockholm does), people coming out of the sauna are prime customers for a protein shake or herbal tea. In addition, a hero wellbeing feature can encourage guests to extend their stay (for example, booking a late checkout to enjoy another circuit in the morning, perhaps paying a fee for the late checkout). Global Wellbeing Institute research shows that wellbeing travellers spend more on the property — not just on spa services, but also on dining and shopping — than regular travellers. They are essentially a profitable segment: they buy the €10 green juice, the yoga class and so on. So capturing this market with a distinctive experience ends up lifting several line items.

Competitive differentiation and marketability: in a crowded hospitality market, a sauna + cold plunge can be a real USP (Unique Selling Proposition). It looks great in photos for marketing material and instantly communicates the message "we put wellbeing and standout experiences first". In the EU especially, where travellers may be actively comparing what each hotel spa offers, having a contrast therapy facility can be the deciding factor. For example, ski resort A has a basic sauna and a hot tub, while ski resort B has a full «fire and ice spa circuit» with outdoor sauna, ice plunge and so on. Many wellbeing-minded tourists will choose B, even at a higher price, because it promises a more inventive, Instagram-worthy après-ski.

It is also a story PR teams love: "Hotel X unveils Nordic Spa featuring [Region]'s first snow sauna and ice plunge" — headlines like that get picked up by travel and lifestyle media, providing free publicity. Internally, marketing teams can build packages and promotions around it (for example, "Winter Warrior Package: includes a daily contrast therapy ritual and a Viking cocktail after the plunge"). The thematic possibilities are endless and fun, which helps both sales and promotional campaigns.

From a brand perspective, if you create a unique name for your hot-cold experience (such as "Thermal Journey", or something local like "Silicon Spa Circuit" if you are in Silicon Valley), you are nearly building a mini-brand that guests will remember. It becomes part of your identity as a property. Some hotels even partner with influencer trainers or wellbeing personalities to host on-site cold plunge challenges or retreats, leveraging their facilities to attract new audiences.

ROI and cost considerations: we should of course acknowledge the costs — saunas and especially chilled plunge pools have installation and operating expenses (equipment, energy, maintenance and so on). Yet industry experts argue that, when delivered strategically, wellbeing amenities can deliver strong ROI by lifting overall property performance. For example, one study found that hotels with extensive wellbeing facilities had higher revenue per room, even after accounting for higher operating costs, compared with hotels with minimal wellbeing offers. The lift in revenue from higher ADRs, additional spend and the attraction of higher-paying guest segments tends to outweigh the costs if the facilities are well used. The trick is to ensure usage: an empty facility is wasted money, but as discussed, current trends suggest hot-cold features will be popular.

Then there is the longevity of these facilities, which matters too. A well-built sauna can last many years, as can a good cold plunge system (with pump or chiller upgrades as needed). They do not need anything like the labour of, say, running a wide range of fitness classes with trainers — a sauna and cold plunge mainly cost utilities and periodic maintenance. In fact, some wellbeing design analysts point out that adding more self-directed wellbeing experiences (such as thermal areas) can reduce labour costs relative to revenue, since guests can use them without one-on-one service. This improves spa department margins.

You can also consider knock-on benefits: having a "complete" spa with contrast therapy can earn your hotel a higher star rating or a coveted wellbeing certification (such as the EuropeSpa quality mark), which in turn attracts more business (from tour operators, wellbeing travel agencies and so on). For resorts, it can open the door to hosting specialist retreats or corporate wellbeing events that might not have considered your venue without those facilities.

In summary, when you integrate a sauna and cold plunge thoughtfully, you are investing in an experience that guests value and will pay for. It is not a frivolous add-on; it can become a revenue-generating centrepiece. A telling example: some holiday rental owners have noted that adding a hot tub or sauna meaningfully lifted their occupancy and nightly rate. One survey found that adding a hot tub led to up to a 13% increase in holiday rental occupancy. We can infer that a truly distinctive amenity, such as a full contrast circuit, could have equal or greater appeal in a hotel setting, especially in the wellbeing niche.

To conclude on ROI: the sauna + cold plunge pairing can deliver returns across several dimensions — tangible revenue, higher guest satisfaction (and therefore repeat business) and distinct market positioning. Provided you account for maintenance and ensure safety (covered next), the investment tends to pay off in today's wellbeing-driven travel market. As one wellbeing consultant summed it up: "Integrating wellbeing leads to multidimensional returns — higher rates, loyalty and even long-term asset value." In the next section, we balance this optimistic outlook with the practical side: the operational factors you need to manage to keep this experience safe, clean and compliant.

Operational considerations: safety, hygiene and maintenance

Offering a hot-cold experience is not just about building the facility — operational diligence is what keeps guests safe, the property compliant and your investment lasting. Hotel operators must pay attention to everything from water quality and equipment care to guest education and local health regulations. Here, we set out the main considerations and best practices for running a sauna and cold plunge in a commercial environment.

Hygiene and water quality: a cold plunge pool or tub is essentially a small shared body of water and is therefore subject to hygiene requirements similar to those of a swimming pool or hot tub. In the EU, most countries impose strict standards for any public or semi-public bathing facility — be it a hotel pool, spa hot tub or plunge tub. For example, in the Netherlands, any pool accessible to the public (including a pool in a hotel or sauna) must comply with strict hygiene and safety rules, including maintaining drinking-water quality, regularly testing chlorine and legionella levels, and keeping a logbook of water checks. You should plan for filtration, disinfection and monitoring systems for your cold plunge. Many cold plunge pools use continuous circulation through a filter and automated disinfectant dosing (chlorine or bromine), like a regular pool, because stagnant cold water can harbour bacteria even when chilled. Automated sensors that track pH and ORP (oxidation-reduction potential) can help maintain water quality with minimal manual intervention. Make sure your team is trained in water treatment, or hire a pool maintenance service.

If your installation is a simple fill-and-empty tub (some smaller plunge tubs are emptied after each use or daily), then you must disinfect between fills and keep the water source clean. Note that many countries require fill water to be potable (drinking-water quality). Cold does not equal clean either — pathogens can survive in cold water, so cold plunge pools need sanitisation even at near-freezing temperatures. Do not forget air quality in indoor facilities: if you use chlorine, make sure the room is ventilated so by-products do not build up (although cold water generally releases less chemical vapour than a hot tub). The bottom line: run your cold plunge with the same care as a swimming pool — test it, treat it and document it, both for safety and to pass any health inspection.

Guest safety and health: contrast therapy is generally safe for most people, but it does place physiological stress on the body. Operators should provide clear guidance and supervision to prevent misuse. Key safety measures include:

• Time and temperature warnings: post recommended durations (for example, "Limit sauna use to 15 minutes per session" and "Plunge into the cold water for 10 to 30 seconds, or as long as you feel comfortable"). Remind guests not to overdo it. It is easy for an enthusiastic newcomer to stay in the sauna too long and feel dizzy, or to think they should prove their endurance by sitting in 5 °C water for several minutes (which can lead to hypothermia risk). Responsible sauna culture, in fact, discourages this kind of bravado — "competing to see who can take the most heat is silly and bad for health", the Finnish Sauna Society advises. You can weave that wisdom into your signage in a friendly tone.
• Health contraindications: it is important to alert guests with certain medical conditions to take care or avoid the facility. People with uncontrolled hypertension, severe heart disease or who are pregnant should consult a doctor or limit exposure to extreme temperatures. For example, Finnish guidelines note that people with heart problems or hypertension should avoid sudden cold-water immersion after the sauna, because it can cause spikes in blood pressure. A simple sign such as "Hot and cold therapy can be strenuous — if you have cardiovascular or other health conditions, take care or seek medical advice before use" is sensible.
• Emergency preparedness: make sure there is an emergency button or alarm in the sauna (standard in many countries' building codes) so a user can call for help if they feel unwell. In the plunge area, have an easy way to call staff or a staff-monitored camera (respecting privacy), since a person could faint or slip. It is rare, but being prepared is essential. Having staff trained in first aid and CPR on site (such as fitness instructors or spa attendants) is strongly recommended. In some jurisdictions, you may need a lifeguard for pool areas — typically small plunge pools may be exempt below a certain size, but always check local regulations.
• Physical safety measures: small things make a big difference. For example, non-slip surfaces are essential around the plunge and shower areas — wet feet on smooth tiles is an accident waiting to happen, so use textured flooring or rubber mats. Provide robust handrails and steps for getting in and out of the cold plunge; the cold can shock the muscles and people may feel suddenly weak or short of breath on first immersion, so good handrails help prevent falls. In the sauna, make sure the heater is properly guarded so no one can accidentally touch it. Provide mats so the floor does not get too hot for feet. All equipment should meet the relevant safety certifications (in the EU, electric sauna heaters must carry the CE mark and often meet specific overheat-protection standards).
• Supervision and access control: decide whether the area will be staffed continuously. Luxury resorts often have an attendant or spa staff member checking the thermal suite periodically, which is ideal for safety and service (offering water to guests, and so on). If unstaffed, think about safety measures: perhaps locking the area after a certain hour to prevent unsupervised use, especially by intoxicated people (you definitely want to discourage cold plunges or sauna use under the influence). Many venues also set age restrictions — for example, under-16s not allowed without adult supervision — because children regulate temperature differently and may not pay attention to warning signs. Post your rules clearly (for example, "Children must be accompanied by an adult. Not recommended for children under X years old").
• Regulatory compliance: different countries have different specific rules. Some require operating licences for thermal pools, periodic health-department inspections or special permits if you offer these services. For example, in the UK, there are surprisingly few sauna-specific regulations, but using best practices from countries like Finland is encouraged. In Finland and elsewhere, commercial saunas are built to strict fire and ventilation safety standards. Make sure your sauna construction complies with fire codes (correct materials, clearances, sprinklers if needed). In addition, electrical components in wet areas (lights, controls) should be installed to regulations to avoid electric shock risks.

Following a recognised standard or obtaining a quality certification can be useful. The European Spa Association's EuropeSpa certification, for example, has criteria that guarantee facilities meet high standards of safety and hygiene. It may be overkill for a small hotel, but for resorts it is worth considering as a trust signal.

Maintenance and durability: to keep the guest experience at a high level, you will need a maintenance plan for both the sauna and the plunge. Saunas need periodic heater checks (heating elements or stones replaced as needed), wooden benches must be cleaned and eventually refurbished or replaced as they wear, and doors and ventilation must be maintained. A heavily used daily sauna ages faster — using high-quality wood such as cedar or Nordic spruce helps, since they hold up better to the cycle of heat and humidity. Encourage guests to shower before the sauna (many cultures make it a rule) to keep sweat and grime off the wood as much as possible. Provide towels to sit on (also more hygienic). This reduces stains on the benches and odours.

For cold plunges, a key part is the chilling system (unless you literally fill it with ice every time, which is not practical at scale). Chillers and circulation pumps need a preventive maintenance schedule — cleaning filters, checking refrigerant levels and so on. Because the water is cold, scale or biofilm can build up differently than in hot tubs; use suitable cleaning chemicals. If using chlorine, cold water may need a slightly higher residual to be effective (since disinfection is slower in the cold), so check with your pool supplier on the right levels. Monitor for any signs of contamination (cloudiness and the like) and respond promptly — shocking the pool or refreshing the water as needed.

It is wise to schedule regular intervals for deep cleaning. Some spas close their thermal areas one day a week or for a few hours a day for cleaning. During cleaning, scrub and disinfect pool surfaces, hose down sauna benches and so on. Also check items such as lights (is the chromotherapy light in the plunge still working?), thermometers and hygrometers (guests like to see the temperature gauge — make sure it is accurate) and drainage (clear any blockages in the floor drains — they inevitably catch towels or stray debris).

Energy use is another maintenance consideration. Saunas can use a lot of energy (holding around 90 °C for hours) and cold plunge pools also consume energy to keep the water cool continuously. To manage costs, you can use timers or smart controls — for example, lowering the sauna's standby temperature during quiet hours, or covering the cold plunge overnight to reduce heat gain. Modern systems even allow energy-saving modes that still let the facility heat up quickly when a guest arrives. While constantly heating and cooling a sauna may add wear, a few tweaks can cut utility bills. With sustainability as a priority, consider heat recovery systems — for example, surplus heat from the sauna's HVAC could in theory help warm your pool or water elsewhere; some innovative spas tap into these synergies. Make sure too that the sauna walls are well insulated and the door is well fitted, so you are not heating the whole building.

Finally, training your team is also part of maintenance. Make sure the person in charge (engineer, spa manager and so on) knows every detail of the equipment. They should know how to shut off the sauna heater quickly in an emergency, how to backwash the cold plunge filter, and which chemicals to use (and avoid) on wooden surfaces (for example, no harsh bleach, which damages wood — usually a mild wood soap is the right choice).

Guest education and etiquette: smooth running also depends on guests respecting a few etiquette rules. It can help to post or hand out etiquette guidance — such as showering before entering (for hygiene), using a towel in the sauna (for comfort and cleanliness), no glassware (only plastic cups for water in the area, to avoid breakage) and so on. Many European spa-goers are familiar with these norms, but international guests may not be. Simple, polite reminders keep the facility pleasant for everyone and reduce your cleaning load (for example, a sign saying "Please do not pour water on the sauna heater unless using the ladle provided — ask staff if unsure" can prevent someone from inappropriately wetting an electric heater).

In summary, running a sauna and cold plunge in a hospitality setting calls for a diligent approach to cleanliness, safety and preventive care. By implementing strict hygiene protocols, monitoring and managing risks, and keeping equipment in top condition, you ensure this wonderful guest experience stays safe and worry-free. Many of the measures simply mean adopting the same standards you would for a pool or any spa — but they are worth emphasising, because a single incident (a slip injury or a bacterial outbreak) can undo the good reputation you have built. Fortunately, with the right measures, such incidents are rare. Most hotels run their thermal areas with excellent safety records. And when guests see clear signs of cleanliness and instructions (crystal-clear water and posted guidelines), it builds confidence and encourages them to take part safely.

Conclusion

Saunas and cold plunges, when paired, create far more than a passing wellbeing trend — they offer a transformative journey for guests that combines tradition, excitement and rejuvenation. For hospitality providers, integrating this hot-cold ritual can set your property apart, offering exactly what today's wellbeing travellers seek: authentic experiences that engage the senses and the soul. We have explored how the popularity of contrast therapy is growing across Europe, driven by demand from wellbeing tourists and fitness enthusiasts who crave that sense of «vitality» it delivers. By thoughtfully designing a sauna + cold plunge circuit — whether it is an extensive thermal suite at a resort or a cosy rooftop installation at a boutique hotel — you can serve properties of any size and type, weaving wellbeing into the DNA of the guest experience.

The business case is compelling: higher guest satisfaction, more positive reviews, greater spend on ancillary services, and a marketable signature amenity that supports premium rates. When guests leave feeling euphoric and accomplished (and perhaps with a social media post that prompts a touch of envy about the steaming sauna and icy plunge), they take with them a positive impression of your brand that can translate into loyalty and advocacy. In the competitive hospitality landscape, a differentiated offer like this is a strategic asset.

Of course, success lies in execution — keeping safety, hygiene and operations at a high standard so that every hot-cold circuit is a delight, not a risk. By following industry best practices and local regulations, training your team and educating guests, you protect both your customers and your investment. Done well, the sauna and cold plunge pairing can run efficiently for years, continuously delighting new visitors and perhaps even becoming a legend in travel circles ("You haven't really stayed at Hotel X until you've tried the midnight sauna ritual and the glacier plunge!").

In the end, integrating contrast therapy is not about adding amenities, but about creating an experience. It is the sequence of sensations and emotions that will lodge in your guests' memories. The heat that melts away their defences, the cold that wakes up their spirit, the relaxation that centres their mind — that alchemy creates a story guests love to relive and share. And isn't that what defines exceptional hospitality? Creating those one-of-a-kind moments that linger long after checkout.

So whether you are a hotelier in France or a spa designer in Sardinia, consider embracing the hot-cold trend and making it your own. In doing so, you honour a rich European wellbeing heritage while offering something distinctly modern and experiential. Your guests will thank you with enthusiastic reviews — between sauna sessions and cold plunges, of course.

For inspiration in designing your own luxurious sauna experience, feel free to explore our selection of high-quality saunas and cold plunges — each one a potential pillar for your next signature guest offer.

We also offer a complimentary consultation to help design your commercial wellbeing space to the highest standards, providing a complete solution from concept through to bespoke installation. Book your consultation here to get started.

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