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Energy Saving Blinds
Save Energy and Money with a Thermal Roller Blind
Consider whether the room heats up excessively due to sunlight. Consider whether heat is lost through the window in winter.
Energy saving thermally efficient fabrics
No roller blinds will completely eliminate the build-up of heat or ‘solar gain’ caused by sunlight passing through a window. The heat is caused by the infrared radiation in sunlight transmitting through the blind fabric, being absorbed by the roller blind fabric itself and radiating, and by being reflected by the roller blind fabric and heating the air in the gap between the fabric and the glass causing hot air flow into the room by convection. All roller blind fabrics will reflect some heat from the sun, absorb some heat from the sun and, with the exception of blackout fabrics, will allow some heat from the sun to pass through them into the room. In summer the most thermally efficient roller blind fabrics are those which reflect the most solar radiation back through the glass. Thermal roller blind fabrics with solar protective coatings, solar reflective coatings and fabrics of light colours reflect the most heat back through the glass. Many roller blind fabric manufacturers now give information as to the percentage of sunlight that their fabrics will reflect, absorb and transmit.
In most houses windows are one of the primary sources of heat loss from a room. No roller blind fabric will completely eliminate the loss of heat through the window, and all fabrics will absorb heat as well as providing a certain amount of insulation by reflecting heat back into the room. Some roller blind fabrics are better at reflecting heat intrinsically and some fabrics are treated with a coating which helps reflect heat. Some roller blind fabric manufacturers give a rating as to the thermal efficiency of their fabrics. However as important as the fabric choice in conserving heat within a room is the fit of the blind to the window itself. The fit should be as tight as possible to the window surround to minimise draughts and air loss. To maximise efficiency and minimise heat loss a roller blind should incorporate a head cassette, side channels with brushes and a sealing strip on the bottom bar of the blind to prevent air passing around the roller blind fabric.