If you have a tradition, gas or oil boiler, it may be one of the following types: “constant temperature boiler”, “low-temperature boiler”, or “condensation boiler”. If you are unsure of the type of boiler you have, please contact your heating engineer. Wood/pellet-burning boilers and heat pumps are different types of boilers. This information can be found on the boiler’s data sheet.

The thermal conductivity of a window is the window’s behaviour at the time of heat transfer by conduction. It represents the energy transferred through the window. Thermal conductivity is expressed in W/m2K. This information can be found on the window’s data sheet.

The thermal conductivity of an insulator is the material’s behaviour at the time of heat transfer by conduction. It represents the energy transferred through the insulator. Thermal conductivity is expressed in W/m2K. This information can be found on the insulator’s material data sheet.