Researchers at the UK's largest energy research project tested heating systems for 18 months and found the single biggest ...

The research revealed that drawing curtains or blinds can substantially cut heat loss through windows, particularly in older properties with single-glazed windows. In a full-scale test house, curtains ...

(bottom to top) With triple glazed windows from 21 Degrees sitting in an insulated, airtight envelope, frost forms on the outside of the window; one of the Tresidder children attempts to peer over an ...