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 preheater systems.
Preheaters do exactly that - preheat. They use solar energy to heat water during daylight hours. This heated water is then pumped into a storage tank and then into your existing water heater which then has to work far less hard to heat water to the temperature set in the thermostat.
If this type doesn't sound right for you, check out the other types of solar hot water systems.
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