Every degree the water is warmed in the preheater reduces the amount of electricity used by the water heater. This also reduces your peak electricity demand for your electric co-op.

I removed the 30 gallon water tank, (serving as a "PRE-HEATER), and replaced kit with a 3 Gallon (sealed) water tank. (on the theory that: if the mirrors have less water to heat up, they will heat ...

The first commercial solar water heater, patented in 1891 by Clarence Kemp, used four cylindrical water tanks housed in a pine box covered with single-pane glass. By 1900, more than 1,600 of these ...

Webb has increased production of its 525 Series no-maintenance fuel heater/water separator. ... The 525 is available with either a 12- or 120-volt electric pre-heater and optional thermostat.

Follow these tips to construct a wood stove hot water coil heating kit and save on utility bills. Includes a diagram and wood stove water heater plans you can set up in your own house.