Introduction
The Harvia Delta D36 is a compact and powerful electric sauna heater designed for home saunas. It features an integrated control unit and a modern black exterior, making it a stylish and efficient choice for sauna rooms ranging from 2 to 4.5 cubic meters. This manual provides essential information for the safe and proper installation, operation, and maintenance of your Harvia Delta D36 sauna heater.

Figure 1: Harvia Delta D36 Black Sauna Heater. This image shows the compact, black-cased sauna heater with its integrated control knobs visible at the bottom. The top part of the heater is open, revealing the sauna stones.
Technical Specifications
| Model | Harvia Delta D36 |
| Power Output | 3.6 kW |
| Recommended Sauna Volume | 2 - 4.5 m³ |
| Stone Capacity | Max. 11 kg |
| Dimensions (Width x Height x Depth) | Approx. 34 cm x 63.5 cm x 20 cm |
| Weight | Approx. 8 kg |
| Control Type | Integrated |
| Exterior Material | Stainless Steel (Black finish) |
Note: Sauna stones are not included and must be purchased separately.
Important Safety Instructions
Read all instructions carefully before installation and use. Failure to follow these instructions may result in fire, electric shock, or injury.
- Installation must be performed by a qualified electrician in accordance with all local and national electrical codes.
- Ensure the sauna room is properly constructed and insulated for optimal heater performance and safety.
- Do not cover the heater with towels or other objects. This can cause overheating and fire.
- Only use genuine sauna stones recommended by Harvia. Do not use ordinary stones or other materials.
- Keep children and pets away from the hot heater.
- Do not pour excessive amounts of water on the hot stones.
- Always ensure adequate ventilation in the sauna room.
- Disconnect power before any maintenance or service.
Setup and Installation
The Harvia Delta D36 heater is designed for quick and easy wall-mounting. A mounting frame is supplied for this purpose.
1. Unpacking and Inspection
- Carefully remove the heater from its packaging.
- Inspect the heater for any signs of damage during transit. Report any damage to your supplier immediately.
- Ensure all components listed in the packing list are present.
2. Mounting Location
- Choose a wall in the sauna room that can support the weight of the heater and stones.
- Ensure sufficient safety distances from walls and benches as specified in the detailed installation manual (not provided here, refer to full product documentation).
- The heater should be positioned to allow for proper air circulation.
3. Electrical Connection
WARNING: Electrical installation must be performed by a licensed electrician.
- Ensure the main power supply to the sauna room is disconnected before beginning any electrical work.
- Connect the heater to the appropriate power supply according to the wiring diagram provided with the full product documentation and local electrical codes.
- Verify all connections are secure and properly insulated.
4. Placing Sauna Stones
- Use only angular, split-face sauna stones designed for electric heaters.
- Arrange the stones loosely in the stone compartment to allow for good air circulation. Do not pack them tightly.
- Place smaller stones on top and larger stones at the bottom.
- Do not place stones in a way that obstructs the air vents or heating elements.
Operating Instructions
The Harvia Delta D36 features an integrated control unit for easy operation.
1. Pre-heating the Sauna
- Ensure the sauna room is empty and clear of any flammable materials.
- Turn on the main power supply to the sauna heater.
- Use the integrated control knobs located at the bottom of the heater to set the desired temperature and operating time. One knob typically controls temperature, and the other controls the timer.
- Allow the sauna to pre-heat for approximately 30-60 minutes, or until the desired temperature is reached.
2. During Sauna Use
- You may pour small amounts of water (max 0.2 liters at a time) onto the hot stones to create steam. Use only clean tap water.
- Do not pour water over the side of the heater or directly onto the heating elements.
- Avoid touching the hot surfaces of the heater during operation.
3. After Sauna Use
- The heater will automatically shut off after the set operating time.
- Turn off the main power supply to the heater after use for safety and energy saving.
- Allow the heater and stones to cool down completely before leaving the sauna unattended.
Maintenance
Regular maintenance ensures the longevity and safe operation of your Harvia Delta D36 sauna heater.
1. Stone Maintenance
- Annual Inspection: At least once a year, rearrange the sauna stones. Remove any small, broken pieces of stone that may have accumulated at the bottom of the stone compartment.
- Stone Replacement: Replace worn-out or crumbling stones as needed, typically every 1-3 years depending on usage. Worn stones can impede air circulation and damage heating elements.
2. Cleaning the Heater
- Ensure the heater is completely cool and disconnected from power before cleaning.
- Wipe the exterior of the heater with a damp cloth. Do not use abrasive cleaners or solvents.
- Do not spray water directly onto the heater.
3. Electrical Connections
- Periodically check electrical connections for tightness and signs of corrosion. This should be done by a qualified electrician.
Troubleshooting
This section provides solutions to common issues you might encounter with your Harvia Delta D36 sauna heater.
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater does not heat up. | No power supply; Timer not set; Overheat protector tripped; Faulty heating element. | Check main power switch and circuit breaker. Set timer correctly. Reset overheat protector (refer to full manual for location). Contact a qualified electrician for element inspection. |
| Heater heats slowly or insufficiently. | Incorrect sauna room size for heater power; Poor stone arrangement; Poor ventilation; Worn-out stones. | Ensure sauna volume is within 2-4.5 m³. Rearrange stones for better air flow. Check ventilation system. Replace worn stones. |
| Heater makes unusual noises. | Stones settling; Foreign objects in stone compartment; Loose components. | This can be normal as stones heat and expand. Check for debris in stones. If persistent or loud, disconnect power and inspect or contact service. |
| Strong burning smell. | Dust or debris on heating elements; New heater burning off manufacturing residues; Overheating due to obstruction. | Ensure heater is clean. Initial smell is normal for new heaters. Check for any objects covering the heater. If smell persists, disconnect power and investigate. |
If the problem persists after attempting these solutions, please contact Harvia customer support or a qualified service technician.
Warranty and Support
Harvia products are manufactured to high quality standards. For information regarding warranty terms and conditions, please refer to the warranty card included with your product or visit the official Harvia website. Keep your purchase receipt as proof of purchase for warranty claims.
Customer Support
For technical assistance, spare parts, or service inquiries, please contact your local Harvia dealer or visit the Harvia official website for contact information.
- Manufacturer: Harvia
- Website: www.harvia.fi (Example link, actual link might vary by region)