The race to get the first "C" rated window confirmed by the British Fenestration Ratings Council (BFRC) is over, with Masterframe's Bygone Collection first past the post. The regulatory body for energy efficiency ratings for windows has confirmed that Masterframe now has a "green" window - i.e. a window that is energy efficient to at least minus 20kWh/m2/year. "The "C" was easier for Masterframe to achieve than most other sash window fabricators," says Technical Manager Ray Rabett. We use a 3-chambered sash profile extruded by Halo. We've also used Low iron glass on the outside, and hard coat Low E glass inside. An argon-filled sealed unit and a warm edge spacer ensure that energy loss is kept to a minimum." Bygone Preferred Installers now have a choice between the standard collection window, with all its advances, and thee "C" rated sash." he added.
