Standard

The Standard Electric Sauna Heater is a reliable and affordable option for home saunas and smaller commercial installations. Featuring a built-in on-stove controller mounted directly on the heater body, this unit offers straightforward temperature and timer control without external wiring.

Available in Silver or Black finishes to complement your sauna interior, this heater delivers consistent heat output and efficient stone placement for high-quality steam production. The compact rectangular design fits neatly into corner installations and works well with both DIY sauna kits and custom-built sauna rooms.

Choose from five power options to match your sauna room size. All heaters are TÜV Safety Certified.

###This Heater Comes With:

- Electric sauna heater unit (SAC series)
- On-stove controller (built-in)
- 18–22kg premium sauna stones (2 boxes)
- Mounting brackets and hardware
- Installation manual (English)

###Technical Specifications:

Dimensions
- Heater Size: 410 × 270 × 520 mm (W × D × H)
- Weight: 10.5kg (heater only, without stones)
- Stone Capacity: 18–22kg

Electrical Requirements
- Voltage: 220–240V (single-phase or three-phase)
- Power Options: 3kW / 4.5kW / 6kW / 8kW / 9kW
- Circuit: Dedicated circuit required
- Wiring: Hardwired installation (no plug)

Controller
- Type: On-stove (built-in to heater body)
- Temperature Range: 40–110°C
- Timer: Up to 4 hours
- Display: Analogue dials

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 Sizing Guide
- 3kW: 2–4m³ (e.g., 1.2 × 1.2 × 2.1m — small 1–2 person sauna)
- 4.5kW: 3–6m³ (e.g., 1.5 × 1.5 × 2.1m — 2–3 person sauna)
- 6kW: 5–8m³ (e.g., 1.8 × 1.8 × 2.1m — 3–4 person sauna)
- 8kW: 8–12m³ (e.g., 2.0 × 2.0 × 2.1m — 4–6 person sauna)
- 9kW: 8–14m³ (e.g., 2.2 × 2.2 × 2.2m — 5–6 person sauna)

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

• Compact rectangular design fits corner and wall installations
• Built-in on-stove temperature and timer controller
• Available in Silver or Black finish
• Stainless steel construction for durability and corrosion resistance
• Efficient stone tray design for quality steam (löyly) production
• Suitable for residential and light commercial use
• Quick heat-up time of 30–45 minutes
• TÜV Safety Certified
• 220–240V power — single-phase or three-phase options available

Please ensure electrical work is completed by a licensed electrician.

Installation

• Professional electrical installation required
• Heater must be hardwired to a dedicated circuit by a licensed electrician
• Sisu Sauna provides installation guidance but does not install standalone heaters
• Dedicated electrical circuit required (30–40A depending on heater size)
• Heat-resistant wiring rated for sauna conditions
• Minimum clearances from walls and ceiling as per the manual

Delivery

• Free delivery throughout Thailand
• Standard delivery timeframe is 1–3 weeks from order confirmation
• Heater and stones ship in separate boxes (2 boxes total)

Pouring Water on Your Heater

• Pour water slowly onto the stones using a ladle — avoid excessive water in one pour. Read our guide on how to pour water on sauna rocks without destroying your heater →

Replacement Heater Elements

• Heating elements typically need replacement every few years depending on usage. Replacement elements available from Sisu Sauna.

Q: What size heater do I need for my sauna?

A: 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. Refer to the Heater Sizing Guide above.

Q: What is the difference between on-stove and external controllers?

A: On-stove controllers are integrated into the heater body and feature simple dial controls for temperature and a timer. External controllers mount on the exterior wall of the sauna room, providing digital displays and more precise control. External controllers are easier to adjust without entering the hot sauna.

Q: Can I install this heater myself?

A: The heater requires professional electrical installation by a licensed electrician. While mounting the heater unit is straightforward, connecting to your electrical supply must be done by a qualified professional to ensure safety and compliance with Thai electrical regulations.

Q: How long does the heater take to warm up the sauna?

A: Expect 30–45 minutes to reach typical sauna temperatures of 80–90°C, depending on room size, insulation quality, and ambient temperature. Larger rooms or poorly insulated spaces may take longer.

Q: Are the sauna stones included?

A: Yes. Each heater includes 18–22kg of premium sauna stones (shipped in 2 boxes). These volcanic stones are selected for sauna use and can withstand thermal shock from water contact without cracking.

Q: What electrical supply do I need?

A: The heater operates on 220–240V power with single-phase or three-phase options available. 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 and recommend the best configuration.

Q: Can I use this heater for an outdoor sauna?

A: 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.

Q: Is this heater suitable for commercial use?

A: This heater is designed for residential and light commercial use, such as small wellness studios, home gyms, or boutique spas. High-traffic commercial facilities that operate continuously may benefit from commercial-grade heaters with higher duty cycles.

Q: What is the warranty?

A: 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.

Q: What maintenance does the heater require?

A: Minimal maintenance is required. Periodically check sauna stones for cracking and replace any damaged stones. Ensure the stone tray remains clear of debris. Heating elements may need replacement after several years of regular use, depending on operating frequency.