Thermal insulation – what does it mean?

External doors have a huge impact on the thermal comfort of a home. Their quality depends on how well they retain heat inside the building and keep it out. A measure of this is the thermal transmittance (Ud), which the lower it is, the better.

Exterior doors with a low Ud-factor can reduce energy consumption for home heating by up to 2%, which translates into savings and environmental performance. When choosing a door, it is important to check whether the Ud coefficient quoted applies to the entire product or only part of it. In the case of technologies in which ERKADO steel doors are made – this coefficient applies to the set of doors together with the frame as standard.

Therefore, it is worth knowing that all the technologies in which ERKADO steel doors are manufactured ensure the thermal insulation coefficient at the level required for passive construction! And thus meet the requirements of the Clean Air programme and comply with the applicable construction standards (WT21).

However, it should be remembered that the coefficient changes with the selected door design. Doors with glazing will in any case prove to be less effective in insulating heat than solid doors. The same is true for outward-opening doors.

Are you looking for a door that meets the conditions of the Clean Air Programme? Nothing simpler, use our model finder and choose the perfect door for your home!