Free Delivery · 1–2 Yr Warranty · After-sales Support
Sauna Stones — Natural Volcanic Löyly Stones Our sauna stones are natural volcanic basalt fragments, selected for authentic Finnish-style steam production. Their irregular shape and honeycombed surface are packed with tiny pores — and that's exactly what makes them so effective.
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When water hits stones heated to glowing red, it seeps rapidly into those pores. The intense heat forces the water to expand and burst outward, producing a thick, powerful rush of steam. In Finland, this is called löyly, the soul of the sauna, and it’s what separates a good sauna session from a great one.
Irregular stones stack casually, but there are two rules worth following:
Leave a gap of two to three fingers between each layer to allow heat to circulate freely. Every six months, remove the stones and flip them over completely. This prevents dust and carbon from building up on the underside, which can reduce heat transfer over time.
Thanks to their porous structure, these stones can boost steam production by around 40% compared to smooth, non-porous alternatives. Because they absorb and release water quickly, you’ll find yourself adding water more frequently — which is exactly how a traditional Finnish sauna is meant to be used.
Made from natural volcanic basalt, the stones withstand extreme temperatures exceeding 600°C and will typically last 3 to 5 years with regular use before needing replacement.
Soak new stones in water and thoroughly scrub them before loading them into your heater. This removes any dust or debris from shipping and handling.
Important: Never use crystalline rocks such as quartz in your sauna heater. Crystalline stones can fracture violently when exposed to rapid temperature changes and water contact, creating a serious safety hazard.
Every sauna is built to your order. Production runs 8 to 12 weeks from the date your order is confirmed, then delivery on top. Timber is a natural material and shipping is a global business, so weather and freight conditions can move that. We tell you if your build shifts rather than letting the date pass quietly.
Delivery is included anywhere in Thailand. International shipping is quoted separately.
YOUR SAUNA ARRIVES IN A CRATE, AND YOU UNLOAD IT
The sauna ships in a sealed timber crate to protect the panels in transit. It is heavy. Crate weight and dimensions are listed in the specifications, and you should read them before you order.
Getting the crate off the truck is your responsibility. The driver is not equipped to lift it. Arrange a forklift, a small crane, or enough people, and have them there on the agreed delivery day. This is the most common cause of a failed delivery, and a failed delivery carries a fee.
Check the access route before you order. The usual problem is a gate or side passage narrower than the crate. Send us a photo of the approach and we will tell you whether it works.
INSTALLATION
Installation is not included and is priced by region, because that is what it costs to get a crew and a vehicle to you:
Central Thailand, from 15,000 THB
Southern Isaan, from 20,000 THB
Northern, Eastern and Western Thailand, from 25,000 THB
Northern Isaan and Southern Thailand, from 35,000 THB
Islands excluding Phuket, from 40,000 THB
You do not have to take it. Many customers stand the cabin up themselves.
ELECTRICAL WORK
We will install your sauna. We do not do the electrical wiring.
You will receive the full electrical specification for your cabin and heater, so your qualified electrician knows the load, the voltage, the current, the cable size and the breaker before they arrive. We will assist your electrician on the day of installation.
In Bangkok and Chonburi we can arrange the electrical work for you. Everywhere else in Thailand you will need to appoint your own licensed electrician.
The wall sections are built and finished at the factory, then crated. On site you are joining finished panels, not building them. Two people with basic hand tools have it standing in one to two days.
No specialist tools, no cutting, no finishing work. The printed manual and our video guides take you through it, and we are on the end of a phone, a chat or a video call while you work. That is included, with no time limit.
The cabin needs a level, load-bearing base that drains. Concrete, paving or a properly built timber deck all work. It does not need to be a slab, but it does need to be flat.
Heater wiring is the exception. That must be done by a licensed electrician, for the reasons set out under Delivery & Installation.
If an electrical item stops working within the warranty period, we’ll send you a replacement free of charge.
Structure and timber: 2 years
Walls, frame, benches, door and roof. If something fails we send a replacement part, or we come and repair it.
Electrical components: 1 year, by replacement
Heater, control panel, lighting and sensors. A failed unit is replaced rather than repaired, so you are not left without a sauna while something is sent away. The warranty covers the part. It does not cover rewiring or reinstallation.
Glass and hardware: 1 year
Tempered glass panels, hinges, handles and fixings.
Claims are handled in Thailand by our own team. There is no importer to go through and no overseas parts wait.
In practice we rarely use it. The cabins are heavily built and the electrical components are ones we have used for years and know well. Failures inside the warranty period are uncommon.
Looked after, a RonYen sauna and its equipment should give you 10 to 15 years of use, and often longer.
What is not covered: damage from misuse, modification, improper installation, lack of maintenance, or normal wear such as timber colour change with age. Timber darkens and moves. That is what timber does, and it is not a fault.
Every 6 months, remove all stones from the heater, flip them over and restack. This prevents carbon and mineral deposits accumulating on the underside, which reduces heat transfer over time.
Inspect stones for cracks, crumbling or significant erosion each time you restack. Discard any stones that are breaking apart — fractured stones restrict airflow and reduce heater efficiency.
Rinse stones with clean water during restacking to wash away loose dust and debris.
Check that airflow gaps between stones are maintained after restacking. Stones naturally settle over time, so re-spacing them keeps heat circulating evenly.
Replace the full set of stones every 3 to 5 years depending on usage frequency. Commercial or heavy-use saunas may require replacement sooner.
Only use clean water on your stones. Avoid pouring essential oils, beer or other liquids directly onto sauna stones — these leave residue that accelerates carbon buildup and can damage the heating elements. Use an aroma bowl or evaporator cup instead.
Stock items can be returned within 7 days of delivery in resalable condition. Custom and made to order items cannot be returned once production has begun. Faulty goods are repaired, replaced or refunded at our cost.
Quote Validity
This quote is valid for the period stated on it. Prices and product availability are subject to change after the validity period.
Payment Schedule
Deposit required upon order confirmation. The remaining balance must be received in full prior to delivery.
Deposit Forfeiture
The deposit is non-refundable. If the Customer cancels after production has commenced or refuses delivery, RonYen Wellness retains the deposit as liquidated damages.
Delivery Date
An estimated delivery date is agreed at the time of order confirmation. The Customer must ensure the delivery location is accessible and a responsible person is present on the agreed date.
Failed Delivery Fee
If delivery cannot be completed due to the Customer's unavailability on the agreed date, a fee of 1,000 THB per day applies until delivery is successful, payable before the goods are released.
Rescheduling
Any change to the agreed delivery date requested by the Customer must be made at least 7 days in advance and is subject to the availability of RonYen Wellness.
Risk Transfer
Risk passes to the Customer on the agreed delivery date, regardless of whether delivery was completed, where the delay was due to the Customer's unreadiness.
Company Delay
If RonYen Wellness fails to deliver by the agreed date, the Customer is entitled to a discount of 0.2% of the total order value per day of delay, up to a maximum of 5% of the total contract value. This is the Customer's sole remedy for late delivery.
Site Preparation
The Customer is responsible for ensuring the installation site meets all requirements, including structural load capacity. Ice baths and saunas are heavy when loaded, and the Customer must ensure the surface can safely support the full weight. Where there is doubt, a qualified structural engineer must confirm load capacity. RonYen Wellness accepts no liability for damage resulting from installation on an inadequate surface.
Warranty
Structural and electrical components carry the warranty periods set out in the product documentation. Warranty does not cover damage from improper installation, misuse, or lack of maintenance.
Limitation of Liability
RonYen Wellness's liability is limited to the purchase price of the product. We are not liable for consequential damages, installation costs, or third-party claims.
Health Disclaimer
Sauna and ice bath use may not be suitable for everyone. Customers should consult a physician before use if they have heart conditions, high blood pressure, are pregnant, or have other health concerns. RonYen Wellness is not liable for health issues arising from product use.
Force Majeure
We are not liable for delays or failure to perform due to circumstances beyond our reasonable control, including but not limited to natural disasters, material shortages, transportation disruptions, or government restrictions.
Dispute Resolution
Any disputes arising from this document shall be resolved through good-faith negotiation. If resolution cannot be reached, disputes shall be subject to the jurisdiction of Thai courts and governed by Thai law.
Outdoor and indoor cabins, barrels, cylinders, cube and modern designs, plus sauna-and-shower combos — 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 — 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 — 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 m³, 6kW for 5–8 m³, 9kW for 8–11 m³, 12kW for 11–15 m³, 15kW for 13–18 m³ and 18kW for 15–20 m³. Above 20 m³ 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.
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 — it’s the easiest way to make cold therapy a daily habit rather than an occasional event.
Our chillers run from 0°C to 42°C, so the same unit chills in the hot season and heats in the cool one. Most people plunge between 3°C and 10°C. Beginners usually start around 12–15°C and work down over a few weeks.
Our chillers include filtration and ozone sanitation that keep the water fresh for weeks between changes. We walk you through simple water care at handover — it’s far less work than a pool.
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 — 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 — we deliver right across Thailand by freight. Wherever you are, we’ll get it to you. Delivery details.
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 — 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 — a concrete pad, deck or paved area — 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 — that part isn’t included, for safety and compliance. We supply the full heater specification and can recommend trusted local contractors.
Reserve online in a couple of minutes — 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 — 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 — 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 — 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.
Get a straight answer on what suits your space, budget and the Thai climate — free and with no pressure.
Book a free consultation
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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 — Rön 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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