Heating, Cooling & Comfort - Choose a Product

Energy-efficient windows can save you money by reducing the energy needed to heat and cool your home. When you reduce your home's energy consumption, you also help to reduce greenhouse emissions that contribute to climate change. Energy-efficient windows can also improve indoor comfort by reducing drafts and exterior noise. They will also have less condensation on the glass and frames - a significant source of mould and mildew.

If you can't afford new windows right now, simple repairs can be done such as fixing a piece of weatherstripping or re-caulking around the frame on the outside. If the window is fogged up between the panes, the problem can be fixed by a glass specialist. Drafty windows can be improved temporarily by adding heat-shrink plastic film or a removable interior or exterior storm window. (Caution: adding a permanent storm window may block a vital emergency exit). For more information, see our Virtual Library under "Home Renovations" for a fact sheet entitled Improving Window Energy Efficiency.

Replacing your home's old windows is your best option for energy savings. When you do, make sure that they are energy efficient by choosing options such as low-emissivity (low-E) glass, gas-filled glazing and a "warm edge" spacer bar.

Many windows on the market today are rated for their energy efficiency. Ask the salesperson for the product's Energy Rating (ER) or the U-value (insulation rating). Ensure that the rating is for the whole product, not just the "centre of glass." Windows may also display the ENERGY STAR^® symbol. This symbol is found only on products that are among the most energy-efficient. Ask the salesperson for more details to ensure that you are getting the right window for the climate of your geographical area. For more information, see our Virtual Library under "Home Renovations" for a fact sheet entitled Consumer's Guide to Buying Energy-Efficient Windows and Doors.