Cover The Windows And Plug The Leaks For Savings In Your Heating Bill
The Age
Saturday July 30, 2005
UP TO 30 per cent of winter heat loss from the average home is through windows, according to information provided by the Victorian Sustainable Energy Authority. This heat loss occurs largely because windows are poorly positioned or unprotected against draughts and heat transmission.
It has been estimated that most families could save about $200 a year by improving the performance of their home's windows, either by using effective curtains and/or blinds, or other methods. Unprotected glass surfaces offer no resistance to warm air, and laminated or thickened glass, according to the VSEA, have minimal impact on heat loss.Closely woven and close-fitted curtains are as effective in winter as they are in summer, as are properly fitting blinds. Boxed pelmets are also effective. They stop warm air from moving down behind curtains and cooling. Tightly fitting Holland or Roman-type blinds also reduce heat loss but they must fit properly to be effective.Reflected coatings and tinted glass are virtually of no use in stopping the transmission of heated air.There are other heat losses quite apart from the window panes. Gaps around windows let in draughts. Effectively draught-proofing the average home (doors, windows, fan openings) can save as much as $100 a year in heating bills.Most homes have excessive leakage of warm air, which can be reduced by fitting adhesive strip around doors and windows without interfering with opening and closing.Other main sources of air leaks include ceiling and wall vents, vented downlights, exhaust fans in heated areas, skylights and open fireplaces.Draught-proofing materials are not expensive and can be fitted by the home owner. Brian Welch is the executive director of the Master Builders Association of Victoria.
© 2005 The Age
