Hot Water
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There are several water-heating options available to you. While you are taking steps to save on home heating, don’t forget to see what you can do to lower your water heating costs. Check with your fuel supplier for more information, and consider alternatives to your current method.
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Storage-type water heaters
Most homes have storage-type water heaters in which water in a tank is heated by a gas or oil burner or by electric elements. Traditional storage heaters have been improved with such features as through-the-wall venting for combustion units and better insulation, making them less expensive to operate. Units designed to give even greater efficiency are now available.
Instantaneous water heaters
Instantaneous water heaters which heat water as needed and have no storage tank are available, but not widely. They require little space, but they usually cost more than storage-type water heaters and more than one unit might be required to meet your needs. For electric instantaneous water heaters, upgraded wiring is often necessary.
Integrated (combination) hot water systems
Systems that combine space heating and water heating are becoming more popular. Water can be heated with a boiler or a storage-tank water heater. The hot water can be used for space heating as well as domestic hot water needs. Space heating methods include baseboard radiators, in-floor radiant heating and forced air heating when piped to an air handler. Some of these systems can also be used for pool and spa heating and snow-melting applications. Combo systems vary widely in efficiency and must be carefully designed to give satisfactory service.
Solar water heaters
In solar water heaters, energy from the sun is collected by solar panels and transferred by circulating fluids to a storage tank. These heaters are typically used with an electric water heater, or one fueled by oil, natural gas or propane, which acts as a back-up for overcast days. Solar collector panels can be mounted on any unobstructed roof, wall or ground frame that faces between southeast and southwest. Solar water heaters are designed to provide between 35 and 75% of your hot water needs, with the back-up providing the balance.
