Rex Nordic


FAQ - Airrex Heaters



How the heaters work

Advanced burner

The device has a patented oil burner with an electric fuel pump that circulates the combustion gases through pipelines with ceramic coating and create heat as infrared radiation.


Complete combustion

The triple combustion process ensures complete and clean combustion. Normal ventilation is sufficient.

Effective sound attention

The silencing system inside the exhaust pipe that compresses and expands the exhaust makes AIRREX very quiet – only 48dB.

Touch control

Simple soft-touch control panel with LED display and remote control.


Airrex is low in emissions

Thanks to utilising the fuel completely as heating energy, the emissions of the Airrex heater are so low that separate exhaust piping outside the heated space is practically not needed. The heaters run on biodiesel made of renewable materials, ordinary diesel or fuel oil.


No need for an exhaust pipe in the Airrex AH-200i infrared heater

This heater does not emit burning smells or visible smoke. The AH-200i is ideal for garages, summer cottages and terraces. An exhaust pipe to the outside is only necessary when the heater is used in premises where people sleep. There is no need to connect a separate exhaust pipe to the Airrex AH-200i infrared heater when using the heater in garages, terraces, party tents, etc.


An infrared heater running on biofuel

The AH-200i heater can run on Neste MY biodiesel, which is made from food waste, and on normal diesel and fuel oil. In temperatures below 10 °C, winter-grade fuel must be used. The Airrex AH-200i heater is extremely inexpensive to use. On full power, the heater only uses about one litre of fuel per hour.

No fan

No fan – no dust

This infrared heater has no fan. The infrared radiation produced by the device heats materials instead of air, thereby also heating the air in the space. The infrared heat is distributed evenly in all directions and feels pleasant even right next to the heater. The infrared heat produced by Airrex AH-200i spreads more evenly than heat produced by a fan-equipped heater.

Sound level

Quiet and easy to use

The heater is very easy to start using because fixed installation is not required. The heater is on castor wheels, which makes it easy to move where you want it.  Airrex  is extremely quiet at only 48 dB.



The Airrex infrared heater is very safe. The device has versatile safety systems. If the heater shakes, it is about to fall unexpectedly or a disturbance occurs in it, its comprehensive safety system immediately turns off the burner and disconnects fuel feeding.

Warranty and Support

Service & warranty

Servicing and spare parts available.

You can find all necessary spare parts for Airrex heaters in our warehouse. If necessary, you can book service  and our service staff will come to you and service your heater.

All spare parts for devices are available in our warehouse.
A well-trained, professional and friendly maintenance staff.
We provide quick and reliable maintenance service.

Our service comes to you – it is that easy!

3 year warranty

Airrex fuel-fired heaters have a one-year factory warranty. The warranty can be extended free of charge for three years by activating the additional warranty. 


Control panel, Mobile App and Remote Control

What type of control panel does the unit have?

Airrex i heaters have a LED control panel with remote control. The display can be used to check the temperature, timer and error codes. You can adjust the thermostat and timer and check the fuel level. The control panel also tells you if the Wi-Fi/Bluetooth connection is enabled. The device is switched on from the control panel; a device that is shut down cannot be started by remote control for safety reasons.

For which phones is the mobile app available?

The heater is controlled using the Airrex app, which can be found both in the Google Play Store for Android and in the App Store for Apple phones.

How do I install the app?

1. Open Google Play or the App Store.
2. Find the Airrex app.
3. Install the app on your device

Can I use the heater without an Internet connection?

Yes. The device also works like the previous models. You can control it with the control panel on the device or with the remote control provided.

How is the device controlled remotely?

The Airrex mobile app works in the same way as the control panel on the device. Airrex i heaters can be controlled remotely from anywhere in the world via the Airrex app. The app shows you the following in real time, for example:

– temperature of the heated space
– fuel level
– whether the heater is running right now – error messages.

You can control the heater as if you were physically next to the device, with the exception that a device that is completely shut down cannot be started by remote control.

Can I start Airrex with a mobile phone?

Airrex i heaters can only be remotely controlled when the heater is first turned on from the power button. However, you can drop the desired temperature to as low as 0 °C. In this case, the temperature of the space will not fall below freezing, and you can raise the temperature by remote control when desired, for example, to 15 or 20 °C. If the device is completely shut down, it cannot be started via the app.

How can I remotely control the heater in a space without Wi-Fi?

Any router/mobile connection device can be used with heaters as long as it supports 2.4 GHz frequency and is small enough to fit in the hole provided (see picture). While most new routers work with Airrex i heaters, we recommend that you use the model available through us, because we have tested it and found it to work. The device will work with any operator’s card as long as the network is good.

What happens when the network/Wi-Fi connection is lost?

f Wi-Fi is lost, the device will continue to operate normally with the current settings until the fuel runs out. If the device finds the network again at any point, you can control it again through the app. The device does not require the use of the app or a network connection. You can use the physical control panel of the device or the remote control provided.

Can more than one person control the heater through the app?

Yes. Everyone just needs to be logged into the app with the same ID.

Power Outages and Restart

Will Airrex restart after a power outage?

Yes. The new Airrex i heaters will continue to operate after a power outage in the same operating mode as before the outage.

How long can Wi-Fi models survive a power outage?

The length of the power outage does not matter, because the data is stored in the flash memory, which is a non-volatile type of memory. The data is retained for up to 10 years even if the power is turned off. You can also use a remote-controlled power outlet.

Heating Efficiency and Coverage

Does the heat also spread evenly in large spaces?

Yes, it does. Infrared heat spreads evenly over very long distances. Many mistakenly think that a fan is needed to transfer heat from one end of a hall to another, for example. A fan is not needed – the infrared heater heats up material, such as the wall, floor and all the materials in the space.

Why is an infrared heater more efficient than a fan heater?

The infrared heater heats material. A fan heater heats air. When you open an overhead door of a hall, for example, the warm air inside escapes, and cold air gets in. In a hall equipped with an infrared heater, all materials are warm so a lot of heat energy is retained even after the air change. In a hall equipped with a fan heater, all the heat escapes out of the door, and heating must be started over at a much lower temperature. As such, the infrared heater needs much less energy.

Odor and Exhaust

How can there be an odorless diesel heater?

When the fuel used is burned almost completely, it does not create odours or dangerous emissions. Carbon monoxide is formed by incomplete combustion, with too little oxygen. When combustion is complete, no carbon monoxide is formed. The product development history of Airrex goes back over 20 years, so the heater’s operation has been honed to perfection.

Why do I catch a slight smell when the heater starts/stops?

When the heater starts/stops, a mild odour of fuel may came from the exhaust pipe. This is because, upon starting/stopping, the heater does not quite manage to completely burn the fuel mist from the nozzle. The unpleasant odour is not dangerous. You can prevent any odour upon starting/stopping by using Neste Green Heat.

How can I be sure that no hazardous gases are coming out of the exhaust pipe?

The exhaust emissions of Airrex heaters have been studied and measured in Finland at the energy technology laboratory of Kymenlaakso University of Applied Sciences (KYAMK). Since 1992, the emission measurement laboratory at KYAMK has conducted exhaust gas measurement for power plants, the process industry and shipping companies. You can view the full measurement results here.

Energy Consumption

Why does my heater consume more than your example says?

Airrex heaters consumes:

  • AH200i: 0,95-1,4 l / h when running

  • AH300i: 1,05 – 1,24 l/h when running

  • AH800i: 1,71 – 1,9 l/h when running

    The amount of fuel required to heat a hall, for example, is influenced by many factors: the roof and wall insulation thickness, number of doors and windows, how often doors/windows are opened, whether cold equipment is brought into the hall, etc.

    During the first few days, the infrared heater consumes more fuel than normally because all the materials in the space are cold. Once the materials warm up to the desired temperature, the consumption is reduced. As such, the amount of fuel consumed per day may vary significantly.

Power Options and Spare Parts

Can Airrex heaters run on power from a cigarette lighter socket?

When you connect a car’s cigarette lighter socket to an inverter of at least 150 W, you can also run Airrex on the power from the cigarette lighter. This makes it possible to use the heater in moving maintenance vehicles, for example.

Is it possible to get spare parts for the heater if something breaks?

Yes, it is. Every part of an Airrex heater can be replaced if needed. The importer has all the spare parts in stock, so the delivery time is very short.

Moisture and Condensation

I have been using the heater for a few days now. Why are there drops of water on the windows of my new hall? Does the heater release that much moisture?

Airrex infrared heaters does not release enough moisture for it to condense on windows. When the infrared heater is first used in a space where only fan heaters have been used previously, there may be moisture on windows. When the infrared heater heats materials, moisture trapped in structures is effectively removed by the infrared heat. If moisture occurs when the Airrex infrared heater is used, we advise raising the temperature to approximately 20 °C for a few weeks and ensuring sufficient ventilation. This will remove the moisture from the heated space.