Pictures taken with a Thermos imaging Camera at 0 degree outside inside the house No Furnace

Nice and warm inside the Passive House no Furnace and 20 plus degree Celsius Windows and Doors show less than 1 degree difference between Wall , Frame and Glass.

Window on north wall ad 0 degree outside less than 1 degree diffidence between wall and window

Passive house front door from  inside at 0 degree out side less than 1 degree different temperature