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					         ?
                                                                                                          and the payback won’t take too many
                                             Ask                                                          years.
                                                                                                              In 2006, the solar industry reported
                                             Natural Life                                                 that the average price of a solar domestic
                                                                                                          hot water system in Canada was around
                                             Answers to reader                                            $6000. Estimated payback periods for a
                                                                                                          solar water heater range from six to 13
                                             questions about                                              years for water originally heated by elec-
                                             sustainable, healthy                                         tricity, and 12 to 20 years for natural gas
                                             family living                                                heating. That system will easily cut your
                                                                                                          water heating bill in half and could save




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                                                                                                          up to two metric tonnes of greenhouse
                                             by Wendy Priesnitz, Editor
                                                                                                          gas emissions annually.
                                                                                                              Solar water heating systems include
                                                                                                          solar collectors and storage tanks. Two
Can We Save Money By Going Solar?                                                                         main types of solar collectors are used
                                                                                                          for residential purposes in cold climates.
                                                                                                          They are flat plate collectors and evacu-
Q: Due to the high cost of energy, my        n’t charge for its energy, so the pay-back                   ated tube collectors. Glazed flat-plate
husband and I would like to consider         begins.                                                      collectors are insulated, weatherproofed
converting to solar. Could you please            The initial costs (and, hence, the                       boxes that contain a dark absorber plate
give us an overview of how it works, how     pay-back timeline) will depend on the                        under one or more glass or polymer cov-
much it costs and whether it’s feasible?     purpose, type and size of the solar system                   ers. Unglazed flat-plate collectors—typi-
                                             you choose. And that will depend on                          cally used for solar pool heating—have a
A: There are two main ways to use the        your budget, as well as the size of your                     dark absorber plate, made of metal or
power of the sun to reduce energy costs      family, your lifestyle, your geographic                      polymer, without a cover or enclosure.
in your h
				
DOCUMENT INFO
Description: Solar water heating systems include solar collectors and storage tanks. Two main types of solar collectors are used for residential purposes in cold climates. They are flat plate collectors and evacuated tube collectors. Glazed flat-plate collectors are insulated, weatherproofed boxes that contain a dark absorber plate under one or more glass or polymer covers. Unglazed flat-plate collectors-typically used for solar pool heating-have a dark absorber plate, made of metal or polymer, without a cover or enclosure. Evacuated-tube solar collectors feature parallel rows of transparent glass tubes. Each tube contains a glass outer tube and metal absorber tube attached to a fin. The fin's coating absorbs solar energy but inhibits heat loss.If you have sat by a sunny, south-facing window on a cold day, you have felt the effects of passive solar energy. Passive solar uses walls, windows, floors and roofs, in addition to exterior building elements and landscaping, to collect and store heat generated by solar radiation. Although it won't provide all of the space heating necessary in a cold climate, passive solar can significantly lower your bill. Experts claim that using building envelope upgrades alone, passive solar can supply 25 percent of a building's heating requirement.
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