Window and door frame for thick walled zero energy house has the inner space heated using residual warmth to reduce energy losses through the double or triple glazing

摘要

A window or door frame for a thick walled zero energy house has a support frame with an inner apace determined by the thickness of the wall. This space is heated using residual warmth, via ducts, and the space can be used for storage or for plants. The frame has an upper section to house a roller shutter.