• Warranty applies only to electric heaters that have been used according to the manual.
• NB! Warranty does not cover heating elements. They are considered as consumable parts.
• Warranty does not cover wear that occurs from natural usage.
• Warranty does not cover defects or wear caused by planned use.
• Warranty does not imply when:
• damage or defects are caused by transportation or other actions not controlled by manufacturer;
• product has been damaged by carelessness or overload;
• product has not been installed correctly;
• product has been modified in any way;
• warranty period is over;
• product is not complete.

• The warranty only applies to the product that has been installed and used in accordance with the manual.
• NB! The warranty does not apply to heating elements. They are considered as consumable parts.
• The warranty does not cover normal wear or improper use of the product.
• The warranty period is 5 years from the date of purchase (based on the purchase receipt).
• The warranty does not apply to defects caused by:
• damage or defects due to transport and or other actions not controlled by manufacturer;
• defects caused by carelessness, improper storage or overloading the product;
• errors in the installation of the product due to noncompliance with the product’s manual, operating instructions or safety requirements;
• modifying the product in any way (parts added, removed or replaced);
• product incompleteness;
• using together with products that are not compatible with this device;
• when the product warranty period has expired.

Yes! There are two integrated stereo speakers on each model.                                     

• Are the temperature sensor and sauna thermometer placed in different parts of the sauna room where temperatures are actually very different?
• Is the temperature sensor too close to the heater? Too close to the door? The best place to install it is on the opposite wall from the heater approximately 15 cm from the ceiling and away from ventilation tubes and windows.
• Does your sauna thermometer work properly?

You probably need to replace your temperature sensor when even after fixing all the above-mentioned issues:

• The temperature difference is more than 20 degrees.
• The temperature displayed on the remote control changes very suddenly or keeps fluctuating.
• The message “Sensor error” is displayed

There could be a problem with the cable connection.

Take down the sensor and try connecting it to the main module using another suitable cable. If the sensor works, you just need to replace the cable. If it still does not work, the sensor needs to be replaced.

In most cases, this happens when the cables of the remote control are not connected correctly.

• First, you should make sure that all the cables are connected to the main module according to the scheme in the installation manual. This should preferably be done by a certified electrician.
• Also, check if any cables attached to the remote control have come loose. If after checking all the cables the remote control still doesn’t work, please contact us at support@usbathstore.com

If your UKU GSM controller does not connect to the network after connecting your app user account to the controller, please contact us and send a photo of the log (Menu -> GSM status -> log).

If your UKU Wi-Fi controller does not connect to the network:

• Make sure you are using a 2.4GHz Wi-Fi network, instead of 5GHz.
• Make sure your different Wi-Fi networks don’t have the same name and that the chosen network name is no longer than 20 characters.

If your Wi-Fi controller still does not connect to the network, take a picture of the error log displayed after pressing “Connect”, and e-mail it to us at support@usbathstore.com

• Check if the mobile data has run out.
• Find out if your service provider has changed the APN settings. If the APN settings have changed, update the settings also in the settings menu of the controller.
• Take the SIM card out and try if it works on your phone.
• If none of this helped, contact us at support@usbathstore.com

Heater output should be chosen based on the sauna room size and insulation.

As a rule of thumb, you need 1 kW of power to heat 1 m³ of the sauna room.

If the heater is too small it will heat the sauna too slowly, it won’t provide enough steam and it might burn out quicker. However, a heater that is slightly too powerful won’t cause trouble if it has a thermostat and it is used correctly.

The second important thing to consider is how the sauna room is insulated. In case there are any uninsulated brick, tile, glass or log walls in the sauna room, an additional volume of 1.5 m³ for each m² of such wall should be added to the sauna room size calculation.

You can use our sauna calculator to find out the volume of your sauna room. To calculate it yourself, multiply the height by the width and the length in meters. Then calculate the sum of uninsulated brick, tile, glass or log surfaces (m²), multiply it by 1.5 and add it to the previous result. As a result, you will have your sauna room volume in m³, based on which you can choose the suitable heater output. If the result falls between two different output values, we recommend choosing the bigger one.

If you have a sauna heater with a controller with a temperature control function, just replace the heater. Install the heater according to the product installation manual and with the help of a certified electrician.

Do you have a mechanical sauna heater without a controller (the switch is on the heater)? In that case, you will need a controller with temperature control function and you will need to set up some cables. Follow the instructions from the product installation manuals and do it with the help of a certified electrician. You might need to open up some walls and install new cables.

• Check if the power of the main fuse matches the parameters of the heater.
• Does the output (kW) of the heater match the volume (m3) of the sauna room? In case there are any uninsulated brick, tile, glass or log walls in the sauna room, an additional volume of 1.5 m3 should be added to the sauna room for each square meter of such wall.

• DROP heater should be positioned on the wall close enough to the sauna bench so that you can easily throw water on the stones from the bench. The top layer of stones should be at the level of your feet when you are sitting on the sauna bench.
• Check Table 1 for minimal safety distances between the heater and the sauna room’s ceiling and walls.
• Pay attention to placing the heater in a way that prevents dangerous situations during its use. Make sure people do not have to pass it too closely when it is hot.
• Before installation remove the protective film from the steel plate behind the heater.
• When installing the wall mount, consider the full weight of 65 kg.

• Only a certified electrician is allowed to connect the heater to the power supply!
• The main cable input is located in the center of the heater, 10 cm above the lower edge.
• A rubber insulated SIHF-JB cable or an equivalent cable must be used as the connection cable. It is forbidden to use a non-heat-resistant cable with PVC isolation.
• The joint box must be waterproof and it must be located up to 50 cm from the floor.
• We recommend connecting the unit to the mains without an earth-leakage circuit breaker.
• Check Table 2 for the maximum current intensity in the cross-sectional area of the cable and circuit breaker.

• Open the cover of the heater’s electrical box.
• Attach the power cable on the terminal block according to the circuit diagram.
• Close the cover.
• Fix the cable on the output with a cable strap.
• Install the heater on the wall frame. Make sure it remains securely attached to the wall.

• DROP heater requires 55 kg of 5-10 cm stones (4 x 15 kg boxes).
• Read more about how to stack the stones correctly.

• Lights/ventilation and vaporiser control
• Door sensor
• Overheating protection
• Child lock
• Timer
• UKU Wi-Fi and UKU GSM controllers also have a remote control option through the mobile app

• Control panel
• Main module
• Temperature sensor
• Door sensor
• Temperature/door switch cable (5+5 m; 2 x 0.22 mm²)
• User interface cable (3 m; 4 x 0.34 mm²)

• Only a qualified electrician may install the device.
• Make sure that the building’s cables from the main switchboard to the desired location in the sauna have a sufficient cross-section.
• In case of an older building, pay attention to the condition of the connecting boxes and if possible, install a new cable from the switchboard to the sauna.
• We recommend connecting the unit to the mains without an earth-leakage circuit breaker.
• The cable connecting the main module with the heater must be heat-resistant (90°C).
• All the cables will connect to the main module.

• The control panel must be installed outside the steam room at the user’s eye level next to the door or according to the manufacturer’s recommendations.
• Install the main module in a dry place that is easy to access. We do not recommend installing the main module in the sauna room. Doing so will be at your own risk. The main module should be installed in a place where the ambient temperature does not exceed 50°C and relative humidity is not higher than 95%. The protection degree of the device is IP65.
• If your control device supports the use of Wi-Fi or GSM connections, make sure you install the main module where the appropriate reception is available.

With HUUM mobile app you can heat your sauna comfortably from wherever you are. You can choose the beginning and end time of the heating, set the desired temperature and check the sauna temperature in real-time. HUUM mobile app works with UKU Wi-Fi and UKU GSM controllers.

• Download HUUM mobile app on your phone (or open HUUM web application)
• Sign up
  Fill in the required fields and create an account.
• Insert sauna ID and sauna code
  You can find the ID number and the code number on the cover of the main module. UKU Wi-Fi will connect to the mobile app instantly if it is already connected to a Wi-Fi network. UKU GSM controller will establish a mobile data connection in 30 minutes.
• Select heating time and temperature
  The app allows you to set the desired temperature and the beginning and end time of the heating.
• Your sauna is heating
  You can check the sauna temperature in real-time from the app. A notification will let you know when the sauna is ready.
• Keep your app updated
  Make sure to update your app regularly so that it can function well. We recommend switching on automatic updates.

Some difference in the measured temperature is considered normal because of the measurement uncertainties of the devices. If the difference is more than 10-15 degrees you should check your temperature sensor and sauna thermometer.

• Are the temperature sensor and sauna thermometer placed in different parts of the sauna room where temperatures are actually very different?
• Is the temperature sensor too close to the heater? Too close to the door? The best place to install it is on the opposite wall from the heater approximately 15 cm from the ceiling and away from ventilation tubes and windows.
• Does your sauna thermometer work properly?

You probably need to replace your temperature sensor when even after fixing all the above-mentioned issues:

• The temperature difference is more than 20 degrees
• the temperature displayed on the remote control changes very suddenly or keeps fluctuating
• the message “Sensor error” is displayed

There could be a problem with the cable connection.

Take down the sensor and try connecting it to the main module using another suitable cable. If the sensor works, you just need to replace the cable. If it still does not work, the sensor needs to be replaced.

In these cases, please contact us at support@usbathstore.com

In most cases, this happens when the cables of the remote control are not connected correctly.

• First, you should make sure that all the cables are connected to the main module according to the scheme in the installation manual. This should preferably be done by a certified electrician.
• Also, check if any cables attached to the remote control have come loose. If after checking all the cables the remote control still doesn’t work, please contact us at support@usbathstore.com

If your UKU GSM controller does not connect to the network after connecting your app user account to the controller, please contact us and send a photo of the log (Menu -> GSM status -> log).

If your UKU Wi-Fi controller does not connect to the network:

• Make sure you are using a 2.4GHz Wi-Fi network, instead of 5GHz.
• Make sure your different Wi-Fi networks don’t have the same name and that the chosen network name is no longer than 20 characters.

If your Wi-Fi controller still does not connect to the network, take a picture of the error log displayed after pressing “Connect”, and e-mail it to us at support@usbathstore.com

Are you using the SIM card that arrived with the controller?

Contact us at support@usbathstore.com

Are you using another SIM card?

• Check if the mobile data has run out.
• Find out if your service provider has changed the APN settings. If the APN settings have changed, update the settings also in the settings menu of the controller.
• Take the SIM card out and try if it works on your phone.
• If none of this helped, contact us at support@usbathstore.com

Some difference in the measured temperature is considered normal because of the measurement uncertainties of the devices. If the difference is more than 10-15 degrees you should check your temperature sensor and sauna thermometer.

• Are the heating elements working properly?
  To find that out, remove some stones and check if the heating elements turn red while heating. If a heating element does not turn red it is broken and needs to be replaced before further use.
• Is there a problem with wiring?
  Before checking that, disconnect the heater from the power supply. Make sure that all the cables of the heater and the control console are connected to the main module according to the manual.If you did not manage to solve the problem, contact us and send us a photo of the main module’s wiring.

Are the heating elements working properly?To find that out, remove some stones and check if the heating elements turn red while heating. If a heating element does not turn red it is broken and needs to be replaced before further using.

• Check if heater or control console cables have come loose.
• Ask an electrician to check if all three phases are connected and actually reach the heater.

If the previous steps did not provide a solution, the problem may be in the main module. In that case, contact us and send us photos of the wiring of the heater and the main module.

• Does your heater have sufficient output for the size of your sauna room? Check the product page.
• Did you take the uninsulated and glass surfaces into account when calculating sauna room volume?
• Are the heating elements working properly?
  To find that out, remove some stones and check if the heating elements turn red while heating. If a heating element does not turn red it is broken and needs to be replaced before further use.
• Is there too much ventilation in the sauna room?

• Pay attention to your heater’s condition, especially if it has not been used for a while.
• Check the condition of the stones once a year or after about 300 hours of use.
• Clean the stones when necessary and replace them when they have started crumbling. Read more about it in the stones chapter.
• When you are cleaning or working on your heater, make sure the power supply is disconnected and the heater isn’t hot.

Between heatings, when the sauna is not hot and there is still a lot of humidity, unwanted bacteria may start thriving in the sauna. To avoid this, it is important to take care of the cleanliness of the sauna. Here are a couple of tips for keeping your sauna clean.

• Always take a quick shower before starting your sauna session.
• Before taking a seat on the sauna bench put something under you, like a towel or a special sitting mat that can easily be cleaned afterwards.
• Clean the sauna room, the sauna bench and the shower room (don’t forget the drains) regularly with a disinfecting detergent.
• After using the sauna open windows and doors to let the rooms dry.

With UKU LOCAL you can heat the sauna from the control panel. With UKU WI-FI and UKU GSM, you can heat the sauna from the control panel and also from HUUM mobile app.

With all UKU models you can:

• choose a suitable temperature (40-110 °C)
• set the heating period (3, 6, 12 or 18 h with control panel; any period with mobile app)
• use the timer to select a starting time for heating.

• To turn on the control panel, start or end the heating, press the button once briefly.
• Go to the settings menu (press and hold the button for 10 seconds) to set the desired heating period. You can choose between heating times of 3, 6, 12 and 18 hours. By default, the heating period is set to 3 hours.
• To choose the temperature, just turn the knob. The number displayed in the upper right corner of the screen is the target temperature of the sauna. The current temperature is displayed in the center of the screen.
• Press the button to start heating.
• You can also use the timer to decide when do you want the sauna to start heating. To activate the timer function, press and hold the button for 3 seconds. Then, choose what time would you like the heating to start and switch the timer on with a single short press on the button.
• During heating, the screen is always active and a heating icon will appear above the temperature value.
• The control console will turn off automatically after the heating or when you have stopped using the button without heating.
• You can access other functions, such as vaporiser, lighting and child lock from the settings menu. To open the settings menu, press and hold the button for 10 seconds.

• You can select the vaporiser function from the settings menu.
• When the vaporiser function is selected, you can increase the steam output by pressing and holding the button and turning it to the right. To reduce steam output, press and hold the button and turn it to the left. In the lower left corner, the setting is shown from 1 to 10.
• Heat intensity is displayed as an indicator in the lower left corner (from 1 to 10).

• Hold the button down for 10 seconds to select the lighting function from the settings menu.
• When the lighting function is selected, you can turn the light on and off with two quick button presses.

• The child lock can be turned on from the settings menu.
• When activated, the child lock will automatically turn on when the screen of the control console turns off.
• To activate the screen while the child lock is on, press and hold the button and turn it 30 degrees to the right, then 30 degrees to the left and then back.

The main benefit of this is you don’t even have to be home to heat your sauna. You could be anywhere and have your sauna hot and ready at exactly the moment you step in the door. This is a great advantage for many home sauna owners as well as accommodation establishments. Continue reading and discover:

• How heating the sauna from your mobile phone can benefit you and also your accommodation establishment;
• Do you need for heating your sauna through the mobile app;
• How HUUM mobile app works and what features it offers.

A HUUM sauna controller with the mobile app remote control option has two important advantages.

Firstly, it saves you a lot of time. Let’s say heating the sauna takes about an hour. With a regular sauna controller, it would mean that once you arrive home you would still have to wait an hour before you can actually use it. With a mobile app remote control, you can start heating the sauna even without being home yet. You can just activate the sauna heater from your phone and spend that hour finishing up at work or exercising at the gym.

In moments when you need a hot sauna the most, you don’t have to wait for it. Maybe you have just spent an entire day skiing or you’re on your way back from a long trip. What could be more welcoming and regenerating than a hot sauna waiting for you the moment you step through the door.

We asked our customers how is the mobile app working for them and how are they using it.

Harry from Finland wrote us this: “Yes, I use the HUUM app frequently, in fact, I always switch the sauna on with the app, whether I am at home or not. When I’m sitting on the sofa – yes, why not switch the sauna on from the phone? When I’m in the garden – there’s no need to go inside the house, I just switch it on while I’m outside. When I’m shopping in the city center, working late at the office or walking outside with my dog – why not switch the sauna on to have it ready by the time I’m back home? It’s simple and easy.”

Another useful aspect is that you don’t have to be physically present to heat the sauna. Here lies a great opportunity for the owners of Airbnb apartments, guesthouses and other accommodation establishments looking to offer something special to their guests.

Adam Rang from Estonian Saunas is already using this smart sauna solution with his Airbnb guests in Tallinn. He provides his guests with sauna log-in information before their journey there. This way the guests can activate the sauna heater accordingly to their travel schedule and have a hot sauna waiting for them on their arrival. Also, during their stay in Tallinn, they can always set the sauna to a perfect temperature for their return to the apartment after having spent an entire day exploring the city.

If you would like to heat your sauna with the HUUM app you first need to purchase a sauna controller with that feature. So, you should have either UKU Wi-Fi or UKU GSM controller installed in your sauna. These controllers can be used with any manufacturer’s electric heaters as long as they work with remote control and have a temperature control function.

Once the controller is in place, all you need to do is download the HUUM app into your phone and connect it to your controller. To do that, just follow the instructions on the screen and insert your sauna controller’s ID and code when requested. After that, you are ready to heat your sauna from the app and enjoy all its features.

HUUM mobile app is about more than just switching the sauna heater on and off. It provides several useful features for adjusting your sauna experience to your wishes.

First, let’s go over the basic functions. When it comes to heating, you can choose the beginning and end time of the heating and set the desired temperature. Thanks to the door sensor of the UKU control unit, the app will know if you have left your sauna room door open and will not allow heating in that case.

While the sauna is heating, you can check the current temperature at any moment to see how it’s proceeding.

If you already know exactly what time you need your sauna to be hot, the timer function comes in handy. Just activate the timer and have the sauna heated exactly by the time you arrive home from a workout or in time for a sauna party.

HUUM sauna controllers can be connected to the lights, ventilation and steamer functions which can be controlled through the mobile app as well. In order to do that you must first activate these functions from the control panel on the wall.

The number of app users is unlimited. Anybody who has the sauna controller ID numbers can download the app and connect it to the heater. This way all the family members can heat the sauna from the app and always see if the sauna is already being heated. Friends invited over for a sauna session can keep an eye on the sauna temperature to know if it is ready yet.

HUUM mobile app comes in the following 6 languages: English, German, Russian, Italian, Finnish and Estonian.

If you value time and appreciate comfort, heating the sauna through HUUM mobile app might just bring your sauna to a new level. This easy and time-saving sauna controlling solution helps to better insert enjoyable sauna moments into a busy modern lifestyle.

To find out more about HUUM mobile app sauna controllers take a look at the product pages of UKU Wi-Fi controller and UKU GSM controller. And since picking a sauna controller can be confusing, we dedicated a separate blog post to just this. In the post, we explain thoroughly the features of each HUUM sauna controller.