FAQs

We generally recommend 70 to 100 watts of power per square meter, depending on how well isolated the building is. For larger rooms you may want to use multiple heaters in order to get enough wattage to properly heat the room. A larger and more powerful heater will of course heat up the room faster than a small low wattage heater. If you do not have enough watts there will be a limit in how much the room can be heated, especially during the coldest months of the year.

All electric heaters are 100% effective, as every watt of electricity used is converted to one watt of heat energy. The control panel and WiFi module use a negligible amount of power.

All Mill panel heaters have a low surface temperature. Our glass panel heaters are especially child friendly as glass does not hold heat as much as steel. Our 600W and 900W glass panel heaters have the lowest surface temperature. All panel heaters are equipped with an overheating protection which will cause the heater to turn of if it gets too hot.

Mill panel heaters come with 1.3m long cables as standard. This is always attached on the right side of the heater. Our smallest 250w heaters have a 0.8m long cable. There are different rules in different countries, so if you need a longer cable on your heater, you should ask a qualified person.

In a typical room, the coldest area will be right underneath windows. We therefore recommend placing a panel heater under windows so that it can heat up the cold air right away.

Specific rules vary from country to country, so please check regulations in your country. All Mill panel heaters are IPX4 certified meaning they can withstand water splashes.

Both kinds of heaters have pros and cons. A panel heater has an aluminium heating element which is in direct contact with the air. This allows the heater to quickly heat up a room. An oil heater takes longer to heat up, but the advantage is that the oil is not in direct contact with the air. This makes for a more pleasant air quality.

A convection heater is based on the fact that hot air rises while cold air sinks. Convection heaters take in cold air from bellow and lets out hot air above. This is an effective way of heating a room because it creates air flow without any moving parts. When the warm air from the heater loses heat, it will sink back down to the floor and the process repeats. There are many kinds of heaters that use the convection effect in this way.

No, not all heaters are certified for use without supervision, please check rules in your country as well as the product information for specific models. All panel heaters can however safely be used without supervision.

All our heaters with LED displays will display the current target temperature. For example, if you have 18 degrees Celsius in the room and the heater is set to 22, the heater will heat until the temperature reaches 22, and then stop heating until the temperature begins to drop. The heaters have an LED light that is on whenever the heater is producing heat.

Heaters with mechanical thermostats are less precise. They have a dial that you can turn freely. The minimum value on the wheel is approx. 5 degrees. Max value is approx. 35 degrees. If the wheel is set halfway up, this corresponds to approx. 22 degrees.

The difference is not very much; mostly aesthetic. Both types are the same except for the front panel. It’s worth mentioning that Mill glass generally has a lower surface temperature, because glass does not retain heat as much as steel does.

Yes, just as you can at home. You only need a Mill WiFi heater and a WiFi router with internet access. You don’t need a hub or any other special hardware. You can easily switch between different houses on the home screen in the Mill app.

An independent device is a device that is not associated with a room in the app. Units linked to rooms will follow a specific weekly program and change temperature accordingly. You can have several units in the same room.
Independent units are controlled individually. They will not follow a program and are instead controlled by a simple temperature slider and an on/off switch.

Yes, the app has a “Share house” function. This allows you to give other users access to your devices.

With generation 1 and 2 heaters, this is not possible. When these are connected to WiFi, only WiFi can affect the temperature setting. However, you can easily turn WiFi off temporarily by briefly pressing the heater’s WiFi button. Press the button again to connect to WiFi.

With generation 3 heaters, you can change the temperature with the physical buttons even when it is connected to WiFi. You can activate child lock or commercial lock in the app if you do not want this to be possible.

All our heaters except those produced before 2013 have a memory function. This meaning that if the heater loses power, it will remember the temperature when power returns. WiFi devices will automatically reconnect to WiFi after a power outage.

We have 3 different WiFi generations. Here is an overview of the serial number prefix for each generation. The serial number is found on the product itself.

Generation 1:

• SKAG-XXXX

Generation 2:

• SKAH-XXXX
• SKAI-XXXX
• SKAJ-XXXX
• SKAK-XXXX

Generation 3:

• SKAL-XXXX

Please note that these serial numbers are also used on heaters that do not have WiFi. WiFi models can easily be identified as they have “WIFI” as part of their model number and also a WiFi button.

If you have a new network or have changed the network name/password on your WiFi system, the device must be reset and set up again. You can add it to the same room/house in the app as before.

All Gen 3 WiFi Panel heaters, Gen 3 WiFi Oil heaters, and Gen 3 WiFi Convection heater (CO1200WiFi3):

– Turn the heater off if it’s already on
– Turn it back on
– As soon as you see the display light up, press and hold the Settings (gear) button on the heater for 20 seconds (until the display says “Fr” for factory reset)

– Important: If the Child lock has been activated on the socket via the app, you must first deactivate the Child lock by holding the socket’s WiFi button for 20 seconds. Afterwards, you can do a reset by holding the button for 5 seconds.

Generation 1 and 2 WiFi panel heaters, and all panel heaters without WiFi:

Turn off the heater’s main switch. Then hold down the settings (gear) button while turning the main switch back on. The display will then show a count. When the display shows 22, it has been reset.

All oil heaters with LED displays, except generation 3 WiFi:

Turn off the heater’s main switch. Then hold down the settings (gear) button while turning the main switch back on. The display will then show a count. When the display shows 22, it has been reset.

The temperature sensor should be accurate down to plus/minus 0.2 degrees, but deviations can occur if, for example, there are air currents in the room or if the heater is placed some distance from where you normally are in the room. Most heaters with a digital display can be calibrated to compensate for this. Refer to the user manual for your heater for guidance.

WiFi heaters can be calibrated via settings in the Mill app.

Heaters with a mechanical thermostat, as well as heaters produced before 2017, cannot be calibrated

None of our heaters should be particularly noisy. It is normal for them to make a small clicking sound when the heat is switched on and off.

Mill generation 3 panel heaters are 100% silent. If you experience an unusual sound from the heater, please contact the shop or supplier of the product.

Oil heaters can make some noise from the oil inside moving as it heats up. The fan in our fan heater models will also naturally make some amount of noise

All Mill heaters with LED displays have a lightning symbol in the display on the heater that tells you whether the heater is heating or not. If this symbol lights up, the heater is currently heating up.

If the heater does not heat up as expected, even if the lightning symbol is on, this may indicate that there is something wrong with your Mill heater. To test whether the heater is defective or not, do the following:

1. Reset the heater (does not apply to ovens with a mechanical thermostat)
2. Set the heater to the max temperature (35 degrees)
3. Within a couple of minutes, the heater should be noticeably warm. You can check this by placing your hand over the on the top of the heater
4. If the heater does not become warm, contact us, or return to the shop where you bought the heater. NB! Remember that you must present a receipt

All Mill Gentle Air Oil Heaters, except the AB-H700MINI, have three different power settings. The heaters have a button that cycles between these levels:

• 1000w oil heater: 400/600/1000w
• 1500w oil heater: 600/900/1500w
• 2000w oil heater: 800/1200/2000w

If the server is OK, the problem can be caused by something local on your device. Try logging out and back into the app (via Settings – Personal information). If you are connected to an office network, have certain firewalls on your network, or are using a VPN, this can prevent the app from communicating with our server. Some work phones with high levels of
security features can also cause problems.