Wiring diagram for the heating system.
MOTHER EARTH NEWS Staff
Here we see the turning vanes (before the grilles are added), which greatly increase efficiency and quietness.
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
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.