Types of solar HWS: Close-coupled thermosiphon

Solar hot water heaters can reduce your household carbon emissions by more than 20%, besides cutting your energy bills drastically. Choosing a style of solar hot water heater can be quite tricky, and it's a great idea to get a solar professional to work through your options. However, here's an explanation about close-coupled thermosiphon (mains pressure) systems.

This is the type that you'll see most commonly - you'll see roof mounted collectors with a horizontal tank about the panels. Usually, no pump is needed because heated water naturally rises through the collectors and into the storage tank. When the heated water enters the tank, cold water in the tank is forced into the collectors and is then heated. This cycle happens over and over throughout the day while the sun shines.

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If this type doesn't sound right for you, check out the other types of solar hot water systems.

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