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.
Source: Canada's Office of Energy Efficiency
Visit their website at this link:
http://oee.nrcan.gc.ca/equipment/english/page50.cfm?attr=4
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