Q: What is an Energy Efficient Window or Door and how do they work?
A: The latest energy efficient glass is called `low emissivity’. This glass contains an invisible metal coating on one of the two sheets of glass that make the glazing of the window or door. This makes the glass reflective, keeping the heat in and the home warmer in the winter and reflecting the heat back in the summer making the home cooler.
Q: How can I tell if the windows and doors I am going to buy are energy rated?
A: Look for a BFRC installer and the BFRC label.
Q: What exactly is the BFRC?
A: BFRC (British Fenestration Rating Council) is a wholly owned subsidiary of the glazing industry’s trade association, the Glass and glazing Federation. Its ratings scheme for Energy Efficient Windows and Doors is a voluntary scheme that uses energy labels specifically produced for windows and doors that are similar to the energy labels seen on most household appliances.
Q: The energy efficiency rating just apply to the glass in the window or door?
A: No. In the BFRC rating scheme the glass, frame and opening casement are rated on their energy saving properties.
Q: I notice that a B rated window or door has a negative value and an A rated window or door usually has a positive value. What does this mean?
A: This figure is the Energy Index and it shows how much energy the window or door will save or lose once it has been installed. This will depend on the building, local climate and indoor temperature.
A positive value means the window or door will enable more energy ( free heat ) to pass through the glass into the room than is going to be lost through it Therefore the window or door is a `free energy’ supplier.
Q: How much do Energy Efficient Windows and doors cost?
A: The cost varies not only between the various ratings ( A to E ) but is also dependant on the size and style. A rated windows and doors will usually cost more than B, C, D and E rated, but this has to be set against the energy savings you will make as you go up the ratings scale.
The rule of thumb is that Energy Efficient Windows or Doors cost less than the heat lost through the old windows and doors, over a given period of time.
Q: How do I find out how much I would reduce my carbon footprint by installing Energy Efficient Windows?
A: It is generally recognized that if you live in a single glazed house and install Energy Efficient Windows you could reduce the energy you use by 0.30 tonnes (or 18%) per year. This calculation is based on `an average semi-detached house’.
Q: Does this rating system include conservatories?
A: Conservatories are currently excluded.
The Window Centre – BFRC authorised to install A Rated windows and doors. Currently held BFRC certificates – BFRC 2051 / BFRC 2052 1 BFRC 2053.