From ฿32,000 Free Delivery Built to order · 6–8 weeks
Diooist Sauna Heaters · Sauna Accessories

Cylinder Heater

The Silver Cylinder Sauna Heater is a striking vertical design that makes a visual statement in your sauna room. Standing 80cm tall with a 38cm diameter, this tower-style heater holds an impressive 50–80kg of sauna stones, creating a dramatic centrepiece and delivering exceptional steam quality.

From ฿32,000
Delivery time 3-5 weeks · deposit refundable up to 3 days*
Island delivery (e.g. Koh Samui, excl. Phuket) — ฿1,500 ferry surcharge added at checkout.

Configure your sauna

price updates live

Power 3kW Included in base
Pick a power
Choose by sauna internal volume — see specs below

Add multiple products, then email yourself the full quote or checkout.

View Quote
Free consultation
Free delivery in Thailand
1–2 year warranty
After-sales support
Frequently Asked Questions
What size heater do I need for my sauna?
Calculate the interior volume of your sauna room in cubic metres (length × width × height). As a general guide, allow approximately 1kW per 1.5–2 cubic metres. For outdoor saunas or rooms with large windows or glass doors, add 20% to account for heat loss. Use the Heater Size Guide in the specifications to match the right heater to your space.
Why choose a cylinder heater over a rectangular heater?
Cylinder heaters offer several advantages. The vertical design holds significantly more stones (50–80kg vs 18–22kg), creating better thermal mass for softer, more consistent heat. The larger stone mass also produces superior löyly (steam) when water is poured over it. The striking tower design creates a visual centrepiece in your sauna, and the circular profile allows efficient air circulation.
How much space does the cylinder heater need?
The heater has a 380mm diameter footprint and stands 800mm tall. Allow adequate space around the heater for air circulation and safety. Maintain a minimum 400mm clearance between the top of the heater and the ceiling. Floor mounting is recommended.
How does the Wi-Fi control work?
The system includes a compact wireless adapter that plugs into the controller. Once connected to your home Wi-Fi network, you download the free app to your smartphone. The app lets you turn the sauna on/off, set the temperature, adjust the timer, and monitor current conditions from anywhere with internet access.
Is the Wi-Fi system complex to set up?
Not at all. The adapter plugs directly into the controller and connects to your Wi-Fi network like any smart home device. The app guides you through pairing in a few minutes. No technical expertise or professional setup required.
Can I still use the wall controller if the Wi-Fi is down?
Yes. The external wall controller works independently. Wi-Fi adds remote convenience, but the physical controller provides full functionality at all times, even without an internet connection.
Can I install this heater myself?
The heater requires professional electrical installation by a licensed electrician. While positioning the heater and setting up Wi-Fi is straightforward, connecting to your electrical supply must be done by a qualified professional to ensure safety and compliance with Thai electrical regulations.
How long does the heater take to warm up the sauna?
Expect 30–45 minutes to reach typical sauna temperatures of 80–90°C, depending on room size, insulation quality, and ambient temperature. The larger stone mass may take slightly longer to reach uniform temperature, but it retains heat better during sessions.
Are the sauna stones included?
No. Stones must be purchased separately. This heater requires 50–80kg of sauna stones (4 boxes). See our Sauna Stones product page.
What electrical supply do I need?
The heater operates on standard Thai 220–240V single-phase power. You will need a dedicated circuit with appropriate amperage (typically 30–40A, depending on heater size) and a correctly rated MCB. Your electrician will assess your electrical panel's capacity.
Can I use this heater for an outdoor sauna?
Yes, but the heater itself must be installed inside the sauna room, protected from direct weather exposure. For outdoor saunas, choose a heater size 20% larger than the room volume calculation suggests to compensate for heat loss.
Is this heater suitable for commercial use?
Yes. The cylinder heater's robust construction and large stone capacity make it well-suited for commercial applications, including wellness centres, spas, gyms, and hotels. The impressive design also enhances the aesthetic appeal of premium facilities.
What is the warranty?
Heaters include a 1-year manufacturer's warranty covering defects in materials and workmanship. Warranty does not cover damage from improper installation, misuse, or normal wear of heating elements.

Have more questions? Chat with us

About this heater

Overview

The generous stone capacity means more thermal mass, which translates to softer, more consistent heat and better löyly (steam) when you pour water on the stones. The cylindrical design allows efficient air circulation around the heating elements and stones.

This heater includes Wi-Fi connectivity for smartphone control, plus 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. Choose from five power options to match your sauna room size. All of our sauna heaters are TÜV Safety Certified.

### What’s Included

– Electric sauna heater unit (cylinder design)
– External wall-mounted controller with digital LCD display
– Wi-Fi adapter for smartphone connectivity
– Controller cable for routing through wall
– Heater mounting brackets and hardware
– Installation manual (English)

Note: Sauna stones sold separately. This heater requires 50–80kg of stones (4 boxes).

### Technical Specifications

**Heater Dimensions**
– Diameter: 380mm
– Height: 800mm
– Weight: 13kg (heater only, without stones)
– Stone Capacity: 50–80kg

**Electrical Requirements**
– Voltage: 220–240V single-phase
– Power Options: 3kW / 4.5kW / 6kW / 7.5kW / 9kW
– Circuit: Dedicated circuit with appropriate MCB required
– Wiring: Hardwired installation (no plug)

**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)

**7.5kW Heater**
Suitable for 8–14 cubic metres. Example: 2.0m × 2.0m × 2.1m (4–6 person sauna)

**9kW Heater**
Suitable for 9–16 cubic metres. Example: 2.2m × 2.2m × 2.2m (5–6 person sauna)

Note: For outdoor saunas or rooms with large glass windows, add 20% to your cubic metre calculation when selecting heater size.

  • - Striking vertical cylinder design creates a visual centrepiece
  • - Massive 50–80kg stone capacity for superior steam quality
  • - Tall tower profile (800mm height) for impressive presence
  • - Wi-Fi connectivity included for smartphone app control
  • - External wall-mounted controller with digital LCD display
  • - Control your sauna from anywhere via free iOS or Android app
  • - Elegant Silver finish
  • - Stainless steel construction for durability and corrosion resistance
  • - Efficient vertical air circulation around stones
  • - Suitable for residential and commercial use
  • - Quick heat-up time of 30–45 minutes
  • - TÜV Safety Certified
  • - 220–240V single-phase power (standard Thai electrical)
Delivery

### Installation

- Professional electrical installation required
- Heater must be hardwired to a dedicated circuit by a licensed electrician
- Floor-mounted design — requires adequate ceiling clearance (minimum 400mm above heater)
- 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
- Wi-Fi setup is simple — adapter plugs into controller and pairs with app in minutes

Installation typically requires:
- Dedicated electrical circuit (30–40A 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 ceiling clearance (minimum 400mm above heater)

### Delivery

- Free delivery throughout Thailand
- Standard delivery timeframe is 2–4 weeks from order confirmation
- Heater, controller, and Wi-Fi adapter ship together
- Stones sold separately and ship in 4 boxes due to weight

Warranty

If an electrical item stops working within the warranty period, we’ll send you a replacement free of charge.

Care & Maintenance

Regular Maintenance
- Inspect stones every 6–12 months and rotate or replace cracked stones
- Wipe down exterior 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 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

Specifications

Dimensions
External380 x 800 mm
Performance
Temperature range60-105c
Heating time30-45 mins
Power & electrical
Power3 - 18kW
Voltage220-240v or 3 Phase Power
Common questions

Everything you want to know about saunas & heaters

Outdoor and indoor cabins, barrels, cylinders and sauna + shower combos — from a compact one-person unit up to ten-person commercial rooms, all customisable to your space. Browse saunas.

Western Red Cedar and Finnish Thermo Pine both handle heat and humidity beautifully; Hinoki is our premium pick. We’ll match the timber to your budget 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 indoor-rated electric heaters.

Most home saunas run on a dedicated single- or three-phase circuit sized to the heater. We’ll confirm the exact electrical requirement in your quote.

Both are food-grade and corrosion-resistant; 316 adds extra protection for coastal and chlorinated environments. We recommend the right grade for your site. See ice baths.

Ice works to get started, but a chiller holds a precise temperature day after day with no effort — the easiest way to make cold therapy a daily habit.

Our chillers take the water down to around 3°C and hold it there. Most people plunge between 3–10°C depending on experience.

A built-in filtration and sanitation cycle keeps the water fresh for weeks. We’ll walk you through simple water care at handover.

We soft-open on 30 July 2026 in Chonburi (with Founding Member pricing) and fully open on 4 September — and booking is open now, so you can reserve a session ahead. Book a visit.

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. Explore the garden.

The Wellness Garden is in Chonburi, easily reached from Bangkok and Pattaya. Full directions and parking details are on the garden page.

Yes — most saunas assemble in a day with two or three people and clear instructions. Prefer it done for you? Our team can handle the full install. Installation service.

Delivery to the spot, full assembly, levelling, heater fitting and a handover walkthrough so it’s ready to use the same day.

A firm, level base — a concrete pad, deck or paved area — plus a nearby power point. We’ll send a simple prep checklist before delivery.

Final connection should be made by a licensed electrician. We provide the full specification and can recommend trusted local contractors.

Yes — we deliver right across Thailand by freight, and ship internationally on request. Delivery details.

Most saunas are ready six to eight weeks from order. Once built, freight to your address typically takes a few days, with tracking provided.

Standard nationwide delivery is included. For tricky access — rooftops, tight lanes or upper floors — we’ll quote any crane or extra handling up front.

Everything ships in a purpose-built timber crate to protect the timber and glass in transit — and the crate is easy to dispose of or repurpose.

Still deciding? Talk to a specialist.

Get a straight answer on what suits your space, budget and the Thai climate — free and with no pressure.

Book a free consultation

Latest Help & Advice

View all
How to Look After an Outdoor Sauna in the Thai Climate All Articles

How to Look After an Outdoor Sauna in the Thai Climate

People often ask me if a timber sauna will just rot in Thailand. With forty-degree afternoons, ninety per…

22 Jul 2026 Read more
How to Maintain Your Ice Bath and Chiller (Without It Becoming a Chore) All Articles

How to Maintain Your Ice Bath and Chiller (Without It Becoming a Chore)

I take care of ice baths for a living, so I’ve made just about every maintenance mistake you…

22 Jul 2026 Read more
What Does a Sauna Cost in Thailand? Real Numbers, Not a Quote Form All Articles

What Does a Sauna Cost in Thailand? Real Numbers, Not a Quote Form

Most companies in this industry won’t tell you the price up front. You’ll usually see a nice photo,…

20 Jul 2026 Read more

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 — 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

Secret Link