Frequently asked questions

Everything you want to know about saunas & heaters

Outdoor and indoor cabins, barrels, cylinders, cube and modern designs, plus sauna-and-shower combos β€” from a compact one-person unit up to fourteen-person commercial rooms. Every model is made to order and customisable to your space. Browse saunas.

Red Cedar and Finnish Thermo Pine both handle heat and humidity beautifully β€” cedar for its aroma and natural rot resistance, thermo pine for its stability in wet conditions. Japanese Hinoki is our premium pick. Canadian Hemlock is excellent value for indoor cabins. We’ll match the timber to your budget, look and location.

Outdoor saunas are fully weather-sealed for gardens, rooftops and pool decks. Indoor models are built for bathrooms, gyms and spare rooms. Both use the same indoor-rated electric stone heaters β€” the difference is the exterior cladding and weatherproofing.

It depends on the internal volume of the cabin. As a guide: 4.5kW for 3–6 mΒ³, 6kW for 5–8 mΒ³, 9kW for 8–11 mΒ³, 12kW for 11–15 mΒ³, 15kW for 13–18 mΒ³ and 18kW for 15–20 mΒ³. Above 20 mΒ³ takes two heaters. Up to and including 9kW runs on single phase; above that is three phase only, which in practice means anything from a six-person cabin upwards. We confirm the exact requirement in your quote so your electrician knows precisely what to install.

Our saunas are made to order in China and Vietnam, in the same factories every time, to our own designs and specifications. We control the drawings, the timber grade and the quality standard on every order, and we have worked with these factories for years. Everything is then delivered and, if you would like, installed by our own team anywhere in Thailand. We would rather tell you that plainly than let you find out later.

Yes. Alongside traditional stone-heater saunas, we offer infrared cabins, which warm the body directly at a lower air temperature. They’re popular for smaller spaces and gentler sessions. We can talk you through which suits you in a free consultation.

LΓΆyly is the burst of soft steam when water hits the hot stones β€” the bit that makes a sauna a sauna. All our traditional stone-heater saunas are built for it: pour water from the ladle over the stones and you get that wave of enveloping heat. Infrared cabins work differently and don’t produce lΓΆyly.

A home sauna reaches operating temperature (around 70–90Β°C) in about 30 to 40 minutes from cold, depending on size and heater. In Thailand’s warm climate you’re starting from a higher ambient temperature, so it’s usually at the quicker end of that range. Optional Wi-Fi heater control lets you pre-heat from your phone on the way home.

Yes β€” that’s the point of made-to-order. Size, timber, glass (full-glass front, window or solid), bench layout, heater type and controls are all adjustable to your site, whether it’s a home garden, a rooftop or a full commercial circuit.

Yes. We supply commercial-grade saunas and full hot-and-cold circuits for hotels, resorts, gyms and wellness spaces, sized and specified for high use. Tell us about the project in a consultation and we’ll scope it with you.

Two-person and four-person, by a wide margin. Two-person suits a home bathroom, a gym corner or a garden. Four-person suits a family or a small studio. Both are made to order, so the catalogue size is a starting point rather than a fixed footprint.

Often better than you would expect. A 3000 Γ— 1500 room takes a comfortable two-person cabin. What it will not take is two bench tiers β€” you need about 1800 mm of depth for that.

Not strictly, but most people end up using the top one. Heat sits at the ceiling, so the upper bench runs hotter and that is where the session happens. If the depth allows it, have two.

Red Cedar from Canada and the American Pacific Northwest. Hemlock from Canada. Thermo Pine from Sweden and Finland. Japanese Cedar and Hinoki from Japan.

No. Teak is excellent outdoors but it is hard and it gets hot to the touch, which makes it uncomfortable against skin inside a hot room. Red Cedar is the better choice for a sauna interior.

You will notice the timber near the door, which most people like. It does not travel through a house unless your air conditioning draws it. Red Cedar has the strongest scent, Japanese Cedar is softer, Thermo Pine has almost none.

No. A well-built sauna holds its heat and its moisture. Some warm air rises when the door opens, and that is all.

We build freestanding cabins rather than lining existing rooms. A cabin can sit against your walls, which uses slightly less timber on the outside and costs slightly less. Tell us which walls it will touch and we will design to that.

Our custom saunas disassemble and reassemble more easily than most, because of how they are built. It is a job for our team rather than a weekend, but it is genuinely possible, and several customers have specified a sauna on that basis.

They are not stocked, but we can build to order. Allow four to five weeks.

Both are food-grade and corrosion-resistant. 316 adds extra protection for coastal air and chlorinated water, so it’s the safer choice near the sea or beside a pool. 304 is excellent value everywhere else. We’ll recommend the right grade for your site. See ice baths.

Ice works to get started, but it melts fast in Thailand and gets expensive. A chiller holds a precise temperature day after day with no effort β€” it’s the easiest way to make cold therapy a daily habit rather than an occasional event.

Our chillers run from 0Β°C to 42Β°C, so the same unit chills in the hot season and heats in the cool one. Most people plunge between 3Β°C and 10Β°C. Beginners usually start around 12–15Β°C and work down over a few weeks.

Our chillers include filtration and ozone sanitation that keep the water fresh for weeks between changes: run the ozone for 30–60 minutes after each session with the lid on, and the hydrogen peroxide in the cleaning kit keeps the water clean in between (about 160 ml on a fresh 320 L fill, then ~50 ml a week, checked with a test strip). Both are safe on stainless, acrylic and PVC baths. We walk you through it at handover β€” it’s far less work than a pool.

Stainless steel tubs, timber-clad baths in cedar and thermo pine, acrylic plunge baths, barrel baths, and all-in-one baths with the chiller built in. Sizes run from single-person plunge tubs to larger baths for two or for commercial recovery rooms.

It comes down to how much water the bath holds and where it sits. Outdoors in the shade: the 1.0HP up to 600 litres, the 1.5HP up to 1,000 litres, the 2.0HP up to 1,400 litres. Indoors in an air-conditioned room: the 1.0HP up to 750 litres, the 1.5HP up to 1,200 litres, the 2.0HP up to 1,700 litres. In full sun, shade the bath and the chiller, or go one size up. Above 1,400 litres outdoors, talk to us and we will size it for you. Each ice bath page shows how much water it holds and offers only the chillers that suit it.

Running cost depends on the chiller size, your target temperature and how well the tub is insulated. A well-insulated bath holding 5Β°C costs far less to run than an open tub you re-chill from scratch each time. We can give you a realistic estimate for your setup.

Yes β€” that’s exactly what a chiller is for. In Thailand’s climate a chiller does the heavy lifting that ice can’t, pulling the water down and holding it there even in full ambient heat. We recommend shade and good insulation to keep running costs down.

With filtration and sanitation running, most people go several weeks between full changes. Top up for evaporation, keep the sanitation cycle running, and rinse off before you get in to keep the water clean longer.

Yes. Our inflatable ice baths set up in minutes and pack away just as fast β€” the easiest way into cold therapy, and ideal for the home, events and pop-ups before you commit to a permanent plunge. They pair with a chiller when you’re ready.

Up to about five metres on a standard installation. Beyond that you need a circulation pump, larger pipework, insulation on both lines and a separate power supply β€” it becomes a plumbing job rather than a plug-in. We can do it, but tell us the distance up front.

It is weatherproof, but it should not sit in direct sun or take rain head-on. A ventilated timber housing with a grate at the back for the fans works well. Leave a gap behind so the hot air can escape, and keep it on wheels so it rolls out for filter cleaning.

230 V single phase, a Type C 16 A breaker, 2.5 mmΒ² cable on its own RCBO. You will also want a floor drain and a water point nearby.

Yes. Stainless steel, acrylic, and steel with a timber outer if you want the look without the timber touching the water.

No. A solid timber tub has to be emptied and refilled daily. If you want a chiller, you want a bath with a liner.

Around 80 kg empty and about 700 kg filled, depending on the size. If it is going on a roof or an upper floor, have your engineer confirm the load first.

Yes. Our brochures are on the site as downloads and we can email them to you. Because every sauna is made to order, the catalogue shows configurations and starting prices rather than a fixed range. Download the brochures.

The room dimensions, whether it is indoor or outdoor, how many people, and roughly where you are. If you have a floor plan, send that. From those four things we can quote accurately.

Yes, three ways. Come to the wellness garden and showroom in Ban Suan, Chonburi, ten minutes from Central Chonburi β€” there is a working sauna and ice baths you can use, by appointment. We hold finished samples of all four timbers. Or we will bring the samples to you: we travel anywhere in Thailand for a fee, and that fee comes off the price of your order when you buy. Book a consultation.

Yes. RonYen Wellness Co., Ltd is VAT registered and can issue full tax invoices. Ask us for the registration document if your accounts department needs it for approval.

Yes. We deliver to Koh Samui, Koh Phangan, Koh Tao, Koh Kood and Phuket regularly. Island delivery carries a supplement over mainland freight, quoted per job, and adds a few days. Tell us the island and we will price it with the quote rather than after.

We service Thailand and Laos. We are not set up for shipping further afield at the moment.

Mainland delivery is included in the price. Islands and remote provinces carry a supplement, quoted with your order.

Yes β€” we deliver right across Thailand by freight. Wherever you are, we’ll get it to you. Delivery details.

Most saunas are ready eight to ten weeks from order, as each is made to your specification. Once built, freight to your address typically takes a few days, with tracking provided. You can follow your build with weekly progress photos in your customer portal.

Standard nationwide delivery is included. For tricky access β€” rooftops, tight lanes or upper floors β€” we’ll quote any crane or extra handling up front, so there are no surprises.

Everything ships in a purpose-built timber crate that protects the timber and glass in transit. The crate is easy to dispose of or repurpose once your sauna’s unpacked.

Yes. Once your order ships, you’ll get tracking, and during the build you can follow weekly progress photos in your customer portal β€” from raw timber through to delivery day.

Your crate is delivered to your address. If you’ve booked installation, our team unpacks, assembles and sets up on the spot. If you’re self-assembling, you’ll have everything you need plus the instructions and our support if you get stuck.

It’s rare, thanks to the crating, but if anything’s damaged in transit we’ll sort it out β€” contact us with photos and we’ll arrange a repair or replacement of the affected part promptly.

Occasionally, depending on the unit and where it is. Send us photographs of the heater, the control gear and the cabin and we will tell you honestly whether it is worth us coming or whether a local electrician can sort it for less.

Heater elements, stones, control panels and thermostats for the heaters we supply, held in Thailand. If you have another brand, tell us the model and we will say whether we can help.

Not currently.

Yes, for saunas in commercial operation. A room running twelve hours a day carries four to six times the load of a home installation, and scheduled servicing is what keeps it performing and keeps the warranty intact. Commercial servicing.

Yes β€” every sauna arrives in a sealed timber crate with the wall sections already built, and most assemble in a day with two or three people and the supplied instructions. No specialist tools needed. Prefer it done for you? Our team can handle the full install. Installation service.

Delivery to the spot, full assembly, levelling, fitting the heater, and a handover walkthrough so it’s ready to use the same day. It’s the easy option if you’d rather not build it yourself.

A firm, level base β€” a concrete pad, deck or paved area β€” plus a power point within reach for the heater. We send a simple prep checklist before delivery so everything’s ready when your sauna arrives.

The final hard-wire connection of the heater should be made by a licensed electrician β€” that part isn’t included, for safety and compliance. We supply the full heater specification and can recommend trusted local contractors.

Most saunas go up in around a day with two people. Larger combos or commercial rooms can take a little longer. The instructions are clear and the panels are pre-built, so it’s more assembly than construction.

Ice baths are largely plug-and-place β€” position the tub, connect the chiller and fill. We’ll guide you through setup and water care. For larger or plumbed-in commercial installs, we can arrange a full fit-out.

Yes β€” our installation service covers the country. Travel and access are factored into the quote. For tricky sites like rooftops or tight lanes, we’ll plan the lift and any extra handling with you in advance.

Reserve online in a couple of minutes β€” pick a plan, a date and a time slot, and choose to pay online or on arrival. You’ll get a confirmation by email and text.

The Garden runs on advance bookings so every session has the space to itself β€” so book ahead if you can. That said, if you're passing and spot us, scan the sign at the gate or give us a call, and if there's room in the current session we'll happily wave you in.

Saunas, ice baths, a swimming pool and shaded lounge areas β€” everything you need for the full hot-and-cold circuit, in a quiet private garden. A towel, flip-flops, a locker and your first drink come free with every visit. Explore the garden.

It’s in Chonburi, easily reached from Bangkok and Pattaya. We’re in a private gated community β€” when you arrive, look for the RonYen sign at the gate and we’ll open it for you. We text a reminder before your session so we’re ready and waiting.

A single session is ΰΈΏ500 per person, a day pass ΰΈΏ900. Visit packs bring it down to ΰΈΏ400–450 a visit, and a monthly unlimited membership is ΰΈΏ2,900. Private hire of the whole garden is ΰΈΏ6,500 for three hours. All plans include access to every facility.

Swimwear is required for the pool, the plunges and the sauna. We provide towels, flip-flops, a locker and your first drink free; showers, hairdryers and changing rooms are all on site. You can add a robe at booking for ΰΈΏ120.

Yes. Bring friends on single sessions or day passes, or book private hire to have the whole garden to yourselves for three hours β€” good for groups, families or a recovery session with your training partners.

Reschedule or cancel free of charge up to 12 hours before your session. Inside 12 hours we’ll move your booking to another day where we can. Visit packs and memberships are non-refundable but transferable.

Not at all. The garden is open to anyone who wants to use it β€” locals, expats and visitors alike. It’s also the best way to try a full contrast session before you decide whether to buy your own setup.

Absolutely. It’s a relaxed, private space and we’re on hand to talk you through the hot-and-cold circuit β€” how long in the sauna, how cold to go, and how to breathe through the plunge. No experience needed.

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Talk to us before
you buy.

A sauna or ice bath is a long-term addition to your home or commercial space. Tell us about your project, your goals and your timeline — we’ll give you a straight answer, including what the right options are.

Free consultation. Phone call, video call, or visit our showroom in Ban Suan, Chonburi β€” RΓΆn Yen Shop & Wellness Garden — by appointment. Tell us your space and budget, and we’ll talk through the options with no pressure to buy.

Ban Suan, Chonburi — 10 minutes from Central Chonburi

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