Free Delivery · 1–2 Yr Warranty · After-sales Support
The Silver Nest Sauna Heater features an elegant open-frame design that showcases its generous load of sauna stones. The basket-style construction surrounds the heating elements with rocks on all sides, creating efficient heat distribution and exceptional steam quality.
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With 75kg of stone capacity, the Nest heater delivers authentic Finnish sauna performance with soft, even heat and excellent löyly (steam) production. The open design allows optimal air circulation and gives your sauna a contemporary, premium aesthetic.
Available in power ratings from 3kW for compact home saunas to 15kW for large commercial installations, this heater adapts to virtually any sauna size. The higher-output models are particularly well suited to spa facilities, wellness centres, gyms, and hotels.
This heater includes Wi-Fi connectivity for smartphone control and an external wall-mounted controller with a digital LCD display. Control your sauna from anywhere using the free app, or adjust settings at the controller outside your sauna door.
The Wi-Fi system includes a compact wireless adapter that connects to your home network. Setup takes just minutes, and the app works with both iOS and Android devices.
Available in Silver finish. All of our sauna heaters are TÜV Safety Certified.
### What’s Included
– Electric sauna heater unit (nest/basket design)
– External wall-mounted controller with digital LCD display
– Wi-Fi adapter for smartphone connectivity
– Controller cable for routing through wall
– 75kg premium sauna stones (4 boxes)
– Heater mounting brackets and hardware
– Installation manual (English)
### Technical Specifications
**Heater Dimensions**
– Diameter: 620mm
– Height: 380mm
– Weight: 12kg (heater only, without stones)
– Stone Capacity: 75kg
**Electrical Requirements**
– Voltage: 220–240V single-phase (3kW–9kW models)
– Power Options: 3kW / 4.5kW / 6kW / 9kW / 12.5kW / 15kW
– Circuit: Dedicated circuit with appropriate MCB required
– Wiring: Hardwired installation (no plug)
– Note: 12.5kW and 15kW models may require three-phase power
**Controller Specifications**
– Type: External wall-mounted with Wi-Fi
– Display: Digital LCD screen
– Temperature Range: 40–110°C
– Timer: Up to 8 hours
– Mounting: Outside sauna room
– Wi-Fi: 2.4GHz wireless (adapter included)
– App: Free iOS and Android application
**Performance**
– Operating Temperature: 70–100°C (typical sauna range 80–90°C)
– Heat-up Time: 30–45 minutes to reach 80°C (varies by room size)
– Stone Heating: Direct contact for efficient steam production
### Heater Size Guide
**3kW Heater**
Suitable for 3–5 cubic metres. Example: 1.2m × 1.2m × 2.1m (1–2 person sauna)
**4.5kW Heater**
Suitable for 4–7 cubic metres. Example: 1.5m × 1.5m × 2.1m (2–3 person sauna)
**6kW Heater**
Suitable for 6–10 cubic metres. Example: 1.8m × 1.8m × 2.1m (3–4 person sauna)
**9kW Heater**
Suitable for 9–16 cubic metres. Example: 2.2m × 2.2m × 2.2m (5–6 person sauna)
**12.5kW Heater**
Suitable for 12–20 cubic metres. Commercial installations. May require three-phase power.
**15kW Heater**
Suitable for 15–25 cubic metres. Large commercial installations. May require three-phase power.
Note: For outdoor saunas or rooms with large glass windows, add 20% to your cubic metre calculation when selecting heater size.
### Installation
- Professional electrical installation required
- Heater must be hardwired to a dedicated circuit by a licensed electrician
- Floor-mounted design — wider profile (620mm diameter) requires sufficient floor space
- External controller requires small hole through sauna wall for cable connection
- RonYen Sauna provides installation guidance but does not install standalone heaters
- We recommend hiring a local electrician familiar with high-amperage appliance installation
- For 12.5kW and 15kW commercial installations, consult your electrician regarding three-phase power requirements
- Wi-Fi setup is simple — adapter plugs into controller and pairs with app in minutes
Installation typically requires:
- Dedicated electrical circuit (30–60A depending on heater size)
- Appropriate MCB/circuit breaker
- Heat-resistant wiring rated for sauna conditions
- Small wall penetration for controller cable
- Wi-Fi network with 2.4GHz support
- Adequate floor space and surrounding clearance
### Delivery
- Free delivery throughout Thailand
- Standard delivery timeframe is 3–6 weeks from order confirmation
- Heater, controller, Wi-Fi adapter, and stones ship separately
- Stones ship in 4 boxes due to weight
- Delivery to ground floor or building loading dock
- Stairs or lift access may incur additional handling fees
If an electrical item stops working within the warranty period, we’ll send you a replacement free of charge.
Regular Maintenance
- Inspect stones every 6–12 months and rotate or replace cracked stones
- Wipe down exterior basket frame with a damp cloth when cool
- Check controller display and connections periodically
Stones
- Use only sauna-grade stones rated for high heat
- Replace any stones that have cracked or deteriorated
- Arrange stones loosely within the basket to allow air circulation
Wi-Fi System
- Keep adapter firmware updated via the app when prompted
- Ensure stable 2.4GHz Wi-Fi signal reaches controller location
Professional Service
- Have a qualified electrician inspect connections annually
- Contact RonYen Sauna if you notice any unusual operation
For detailed care instructions, visit ronyen.com/support
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.
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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