Today I’m at Sand Hill Preserve, where we just finished installing four air-source heat pumps to heat their pool and spa. I wanted to take this opportunity to compare gas, GeoThermal, and air-source units.
They decided to install four air-source AquaCal SQ-166R heat pumps for budgetary reasons. These units can cool the pool during the summer and heat it during the winter. They also have a titanium heat exchanger, which is impervious to the chemical balance of the pool water, so you never have to worry about staining the pool. Our GeoThermal units have the same feature.
Gas heaters, which they used to use at Sand Hill Preserve, have a cupronickel coil. The copper will eventually be stripped out and will stain the pool walls a blue-green color. While we’re on the subject, Sand Hill Preserve paid almost $29,000 a year to heat the pool with gas heaters. With their new air-source heat pump, it’ll only cost them around $8,800 a year. Had they gone with GeoThermal units, they would have saved an additional $3,000 per year.