Wiring diagram for the heating system.
MOTHER EARTH NEWS Staff
The inlet-outlet ducts in the pool room's wall.
Heating a pool with a heat pump was so efficient it paid for itself in reduced utility bills.
Photo by Rae Donaldson
Here we see the turning vanes (before the grilles are added), which greatly increase efficiency and quietness.
Aquastats equipped with sensors, reached by removing a board from the deck, cut in the heater whenever the water drops below a comfortable swimming temperature.