Natural Resources Canada at www.nrcan-rncan.gc.ca

The Office of Energy Efficiency at http://oee.nrcan.gc.ca

United Nations Environment Programme at www.uneptie.org/energy

CSA International at www.csa-international.org
The consumer information section

The Canadian Window and Door Manufacturers Association at www.cwdma.ca

The Siding and Window Dealers Association of Canada at www.sawdac.com
Consumer Hotline: 1-800-813-9616

Window Wise program at www.windowise.com