Today, two active solar technologies that involve electrical or mechanical equipment are becoming more common. First, solar collectors or panels are used to heat water or ventilation air for use in buildings. Second, solar photovoltaic technology uses solar cells to convert sunlight directly into electricity.

70% of the energy used in the residential and commercial/institutional buildings sector is used for heating. Canada also has a very large potential for solar energy use and it has excellent solar resources. Since 2007, there are an estimated 544,000 m2 of solar collectors operating in Canada. They are primarily unglazed plastic collectors for pool heating (71%) and unglazed perforated solar air collectors for commercial building air heating (26%), delivering about 627,000 GJ of energy and displacing 38,000 tonnes of CO2 annually. 

Source: Natural Resources Canada, nrcan.gc.ca

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