For any additional technical question regarding the dimensioning of power, the choice of positioning or other technical constraints, feel free to contact us:

Phone (UK) : 0330 684 5144

Email Customer Service : or contact form


  • 1.CHOOSE THE POWER adapted to your situation
  • 2. POSITION the HEATER to an adapted location

  • 3. Take into account the SURFACE TEMPERATURE of the heater


DEGXEL heaters are very low powers (starting from 200W). For small surfaces 50 Watts can represent 25% of missing power. Do not undersize!

How to calculate the appropriate power?

  • 1st solution: use our available online calculator. Tip: respond to the questions honestly. Do not indicate that the insulation is correct if it is average…

  • 2nd solution: use our customer service to get advice for your first projects

  • 3rd solution: calculate the appropriate power. The parameters to take into account (and to be aggregated if necessary):

Parameters Value Comments
Geographical location (*) Country / Climatic zone / County Zone 1* : start with 55w/m2

Zone 2* : start with 60w/m2

Zone 3* : start with 65w/m2

+ 10% for every 500 meters of altitude starting from 1000 meters

The insulation level of the dwelling (**) With regard to thermal regulation
  • Housing built before 2000 = poor insulation level
    • start with 65w/m2
  • Housing built between 2001 and 2005 = good insulation level
    • start with 60w/m2
  • Housing built between 2005 and 2012 = good to very good insulation level
    • start with 60w/m2
  • Housing built between 2013 and 2020 = very good insulation level
    • start with 55w/m2
  • Housing built after 2020 = excellent insulation level
    • start with 50w/m2
The exposure of the room Orientation with respect to the sun Room exposure (+10 % of power for a room with a northern exposure)
The number of cold walls Number of walls in contact with the outside The number of cold walls (in contact with the outside = not heated). + 10% if 3 cold walls. Take into account which floor it is in the case of apartments.
The type of the room Bathroom, bedroom, living room, office The target temperature desired by the customer may vary. Standard T = 20°C. Add + 7% per additional degree.
  • (**) Level of thermal performance of the dwelling in relation to the Regulations

    On the basis of technical information of the latest works (if they comply with the latest standard in force) or the year of the construction of the dwelling in order to determine the associated Thermal Regulation (TR). If you are not sure whether the latest insulation works (you can help yourself with invoices with the R of the insulators) comply with the latest standard in force, take the year of construction of the dwelling as a reference.

    Thermal standards and regulations are more and more strict. They should be respected. Only dwellings with 2012/2020 thermal regulation or passive houses may consider, under certain conditions, basic powers under 50W per m2.


The radiation must be able to reach all the areas of the room!

Why is the location more important than for conventional heaters?

  • Succinctly the comfort of people by temperature (comfort T) is the average between the air temperature (amb T) and the temperature of the walls (wall T). The walls of a housing heated by infrared heaters have a higher temperature than any other non-radiant heating mode. T comfort T = (amb T + wall T)/2. So the more the walls, floor and ceiling are warmer the more comfort you get. This explains the huge advantage of high-end infrared heaters compared to conventional heaters which only heat the air and leave the structure of the housing cold….

    However, unlike convectors that will heat “unnecessarily” and “inefficiently” the entire air volume of the room regardless of the location of the heater, the infrared heater cannot be placed anywhere. A basic rule must be complied with: all areas and walls of the room must be reached by radiation.

  • The range of DEGXEL heaters is maximum 4 meters (thanks to an exceptional radiation rate of 71%). The power decreases with the distance. It is therefore imperative that all areas of the room to be heated are “reached” by the radiation. The heater radiates to the left, to the right, up and down. For example, in a 4mx4m room, placing the heater in the middle of a 4 m long wall will allow the radiation to easily reach all areas.

  • The solution is therefore to draw a virtual circle with a radius of 4 meters from the selected location and to check that all areas of the room are reached.

    But what if it’s impossible to cover the whole area? 2 solutions: find a better location for the heater or use as many heaters as required by the dimensions of the room. For instance, that’s the case of rooms where the distance between one heater and the opposite walls (or walls on the side) exceed 4-5 meters. It’s more suitable to place 2 smaller heaters (less powerful) to cover the whole area. In such a specific case, prefer 2 heaters of 500W than one of 1000W!


Understanding the principle of far infrared in less than 2 minutes


Degxel reseller partner is responsible for the sale and the installation of the heaters to end customer

Constraints of use

  • DEGXEL heaters have a surface temperature close to 90°C at full power/heat. This phenomenon is a necessity according to the current state of the technology in so far that the surface temperature of the panel directly influences the amount of emitted infrared. Of course this has nothing to do with a 90°C of a liquid. However, small children should not be able to access the heater, under any circumstances. For this reason, it is appropriate to place them out of their reach (in mid height) and to choose a suitable dimension in the presence of young children. The same basic safety rules are to be applied as for wood stoves, fireplaces, cooking plates, etc.