Solar water heating is arguably the most energy-efficient way of producing domestic hot water, as the primary energy source " sunlight " is free. Solar water heating has been used for many years in warm sunny climates, but it can work in locations as far north as Canada and Northern Europe. If you have a large family or use large quantities of hot water, a solar water heating system may be a cost-effective option. While the equipment has a higher initial cost than other types of water heaters, the energy savings can more than offset the cost over the life of the system.
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SELECTING A SOLAR WATER HEATER
Before you purchase and install a solar water heating system, you want to do the following:
Estimate the cost and energy efficiency of a solar water heating system
• Evaluate your site's solar resource
• Determine the correct system size
• Investigate local codes, covenants, and regulations.
Also understand the various components needed for solar water heating systems, including the following:
• Heat ex-changers for solar water heating systems
• Heat-transfer fluids for solar water heating systems