FAQ's

Adding water to sauna stones is a great way to boost humidity and create that classic steam experience, but it’s important to do it safely:

1. Use clean, fresh water only. Avoid using mineral-rich or chlorinated water, as this can damage the heater and stones over time.
2. Wait until the sauna is fully heated. The stones should be hot enough to instantly vaporize the water—usually after 30–45 minutes of preheating.
3. Pour water slowly and carefully. Use a ladle to gently sprinkle a small amount of water (about 1–2 ladlefuls at a time) directly onto the stones. Avoid pouring too much water at once, as this can cause excessive steam bursts or even damage the heater.
4. Never pour water onto the heating elements. Always aim for the stones themselves—contact with the elements can cause electrical hazards or shorten the heater’s lifespan.
5. Stand back as you pour. Hot steam rises quickly and can cause burns if you’re too close.
6. Repeat as desired. Add more water gradually for more steam, but always allow the stones to reheat between pours.

Pro Tip:
Use only stones recommended for your sauna heater, such as HUUM Sauna Stones, Harvia Sauna Stones, or Narvi Sauna Stones, to ensure safety and optimal steam production.

Proper maintenance of your electric sauna heater ensures safe operation, optimal performance, and a longer lifespan. Here’s what you should do:

1. Inspect sauna stones regularly. Check stones at least once a year or after 300 hours of use. Replace any that are cracked, crumbling, or blocking airflow.
2. Clean the heater exterior. Wipe down the heater with a soft, damp cloth. Avoid harsh chemicals that could damage the finish or internal components.
3. Check the heating elements. Remove some stones and turn on the heater—if any element doesn’t heat up or glow, it may need to be replaced.
4. Ensure proper ventilation. Keep the area around your heater clear for safe airflow and efficient heating.
5. Inspect electrical connections. Have a qualified electrician check all wiring and connections annually for safety and compliance with the manufacturer’s guidelines.
6. Keep the control panel clean and dry. Moisture can damage electronic components, so always dry your hands before using the controls.
7. Follow the manufacturer’s manual. Always refer to the specific instructions for your heater model.

Explore our range of electric sauna heaters and find maintenance tips for each model at Sauna Realm Electric Heaters.

Electric sauna heating elements are built to last, but their lifespan depends on usage, maintenance, and brand quality. Typically, you should plan to replace heating elements every 5 to 10 years.

Factors That Affect Replacement Frequency:

• How often you use your sauna: Frequent use can shorten element lifespan.
• Quality of the heating element: Premium brands like Harvia, HUUM, and Saunum generally offer longer-lasting performance.
• Regular maintenance: Keeping your heater clean and replacing sauna stones as needed helps extend element life.

Signs It’s Time to Replace Heating Elements:

• The heater takes longer to heat up or doesn’t reach the desired temperature.
• One or more elements do not glow or heat when the sauna is on.
• Visible damage, warping, or corrosion on the elements.

Pro Tip:
Always follow your sauna heater’s manufacturer recommendations, and have a licensed electrician handle replacements for safety.Explore replacement parts and premium electric sauna heaters from Harvia, HUUM, and Saunum in our Electric Heaters collection.

It’s not recommended to use your sauna heater if one of the heating elements is broken.A faulty or non-functioning heating element can cause several issues:

• Uneven heating: The sauna may not reach your desired temperature, or it will heat up much more slowly.
• Increased strain on remaining elements: The working elements have to compensate, which can cause them to wear out faster or even overheat.
• Potential safety risks: Damaged elements could lead to electrical hazards or further heater damage.

Best practice:
If you notice a heating element isn’t working (it doesn’t glow or heat up), stop using the heater and arrange for a replacement as soon as possible. Always have a licensed electrician handle repairs for your safety.Need help finding the right replacement part for Harvia, HUUM, or Saunum heaters? Check out our Electric Heaters collection or let me know what model you have!

1. Empty the Ash Drawer:
Before lighting your sauna stove, always empty the ash drawer to ensure proper airflow and efficient combustion.

2. Start the Fire:
Use small, dry kindling—such as newspaper or thin pieces of wood—to ignite the fire. Once the fire is established, gradually add larger wood logs.

3. Use the Right Wood:
Only burn natural wood logs in your sauna stove. For most models, logs around 12 inches (30 cm) are ideal. Some larger stoves, like the HIVE Wood 17, may require logs up to 16 inches (40 cm).

4. Control the Airflow:

• Adjust the ash drawer to regulate oxygen:For ignition, keep the ash drawer open about 10 mm (0.4 in) for maximum airflow.Once the fire is burning steadily, close the drawer so only 2–3 mm (0.1 in) remains open.
• Some stoves, like the HIVE Heat, have an additional airflow choke above the door for fine-tuning.

5. Keep the Door Closed:
Always keep the furnace door closed during heating, opening only to add more wood.6. Monitor the Fire:
Watch the fire closely and add wood as needed to maintain your desired temperature. The sauna is ready for use once it reaches your preferred heat level.7. Avoid Overheating:
Never allow the stove casing to glow red—this indicates overheating, which can damage your stove. If this happens, close the ash drawer and furnace door completely to cut off oxygen and stop combustion. If possible, also limit fresh air entering the sauna room.

Pro Tip:
Regularly check and maintain your sauna stove for safety and longevity. Always follow your manufacturer’s guidelines for best results.

Why Do Sauna Controller and Thermometer Temperatures Differ?

A small difference between your sauna controller’s temperature reading and your sauna thermometer is normal due to typical measurement variations. However, if the difference is more than 10–15 °C (50–59 °F), it’s time to investigate: Check the following:

• Sensor and thermometer placement: Are they in different locations where temperatures naturally vary?
• Sensor proximity: Is the temperature sensor too close to the heater or the door? For the most accurate reading, the sensor should be installed on the wall opposite the heater, about 15 cm (5.9 in) from the ceiling—not near vents or windows.
• Thermometer accuracy: Is your sauna thermometer working correctly?

If the issue persists or you notice any of these signs, the temperature sensor may need replacing:

• The difference exceeds 20 °C (68 °F)
• The sauna controller display changes abruptly or fluctuates constantly
• “Temperature input error” message appears on the controller

Tip: Faulty cabling can also cause temperature reading issues. Try connecting the sensor to the main module with a different, compatible cable. If this resolves the issue, simply replace the cable.

Sauna Heater Controller Not Connecting to Network?

If your sauna heater controller isn’t establishing a network connection:

1. Press “Connect” on the controller.
2. If an error message or log appears, take a screenshot.
3. Email the screenshot and a brief description of the issue to support@saunarealm.com.

Our support team will review your issue and respond as soon as possible!

Use this text to provide answers for your most commonly asked questions.

Are the heating elements working properly?
To check, carefully remove a few sauna stones from your heater and turn the unit on. Observe the heating elements—if any element does not glow red or fails to heat up, it is likely damaged and should be replaced before using the heater again.Are the cables properly connected?
For safety, have a licensed electrician disconnect your sauna heater from the power supply and inspect all wiring. Ensure every cable from the heater and controller is securely connected to the main module, following the user manual for your specific model.Still having issues?
If the problem persists, take a clear photo of the main module cabling and email it with a description of the issue to support@saunarealm.com. Our team will get back to you as soon as possible!

Are the Heating Elements Working Properly?

To check if your sauna heater’s elements are functioning:

1. Remove a few stones from the heater (see our Harvia Sauna Heaters, Narvi Sauna Heaters, or HUUM Sauna Heaters for compatible models).
2. Turn on the heater and observe the heating elements.
3. If an element does not glow red, it is likely damaged and should be replaced before continued use.

Are the Cables Properly Connected?

• Always have a licensed electrician disconnect the sauna heater from power before inspection.
• The electrician should verify that all heater and controller cables are properly connected to the main module per your sauna heater’s user manual.

Still Having Issues?

• If the problem persists, take a clear photo of the main module cabling.
• Email the photo and a brief description of your issue to support@saunarealm.com for expert assistance.

Regular cleaning is key to maintaining a safe, hygienic, and long-lasting sauna. Here’s how to keep your sauna in top condition:

1. Wipe down benches and walls after each use with a soft, damp cloth to remove sweat and moisture.
2. Use a mild, non-abrasive cleaner or a solution of water and gentle soap—avoid harsh chemicals that can damage wood and affect air quality.
3. Clean the floor regularly by sweeping or vacuuming to remove dirt, hair, and debris.
4. Wash sauna accessories (like buckets, ladles, and headrests) with mild soap and water weekly.
5. Air out your sauna after every session by leaving the door open for 30–60 minutes to prevent mold and mildew.
6. Deep clean monthly by scrubbing benches, backrests, and floors with a soft brush and a sauna-safe cleaner.
7. Inspect and clean sauna stones periodically—remove any dust or debris and replace stones as needed for optimal performance.
8. Check for mold or mildew in corners and under benches; treat immediately with a sauna-safe solution if found.

Pro Tip: Never use harsh chemicals, bleach, or abrasive tools on sauna wood. Always follow your manufacturer’s care instructions for best results.

Proper preparation of sauna stones is essential for safe operation and optimal sauna performance. Here’s how to get your stones ready:

1. Rinse the stones thoroughly under running water to remove dust and debris. This prevents unwanted odors and protects your heater.
2. Check each stone for cracks or weak spots. Discard any broken or damaged stones before use.
3. Let the stones dry completely before placing them in the heater. This helps avoid steam bursts and ensures even heating.
4. Use only natural, high-quality sauna stones specifically designed for sauna heaters, such as HUUM Sauna Stones, Harvia Sauna Stones, or Narvi Sauna Stones.

For a detailed step-by-step guide, check out:How should sauna stones be prepared before their use? (HUUM Sauna)

Proper sauna stone placement is key for efficient heat and steam. Follow these steps for best results:

• Choose high-quality, natural sauna stones designed for your heater. Top options include HUUM Sauna Stones, Harvia Sauna Stones, and Narvi Sauna Stones.
• Rinse stones before use to remove dust and debris.
• Stack stones loosely in the heater, leaving space for air circulation. Avoid packing tightly. Good airflow ensures efficient heating and steam.
• Place larger stones at the bottom and smaller stones on top for even heat distribution.
• Keep heating elements clear—don’t cover them completely with stones, as this can cause uneven heating or damage.

For more details, check out these guides:

• How should sauna stones be prepared before their use?
• How should sauna stones be placed in HUUM sauna heaters?

How Often Should Sauna Stones Be Replaced? | Sauna Realm

Sauna stones are essential for authentic heat and steam, but exposure to water and high temperatures causes them to break down over time. Replacing sauna stones regularly ensures your sauna heats efficiently and safely. Learn more at Sauna Realm

How Often Should You Replace Sauna Stones?

• Inspect sauna stones at least once a year or after about 300 hours of use.
• For regular sauna use (3 times a week), replace stones annually.
• If you use your sauna less, replace stones every 2–3 years.
• Replace sooner if: The sauna takes longer to heat, the Heater doesn’t reach the right temperature Stones are crumbling or blocking airflow

How to Check and Replace Sauna Stones

1. Turn off and cool the heater.
2. Remove all stones for inspection.
3. Replace stones that are cracked, crumbling, or much lighter.
4. Clean stones that are dusty or have mineral build-up.
5. For best results, replace all stones at once.

Pro tip: For detailed guides on sauna stone prep and placement, see these HUUM Sauna resources:

• How should sauna stones be prepared before their use?
• How should sauna stones be placed in HUUM sauna heaters?

Yes—using protective railings around your sauna heater is highly recommended, especially in smaller or compact sauna spaces where accidental contact is more likely. Protective railings add an essential safety barrier, helping to prevent burns or injuries if someone slips or gets too close to the hot heater. While railings greatly improve safety, they don’t eliminate all risks. Always exercise caution and stay aware of your surroundings during every sauna session.