What Size Heat Pump Do You Need to Heat an 18,000 Gallon Pool?

What Size Heat Pump Do You Need to Heat an 18,000 Gallon Pool?

An 18,000 gallon pool is best heated using a 200-300 BTU heater. Although a smaller heater may be capable of heating heat an 18,000 gallon pool, it's slower to heat the water and needs to work harder.

A heater larger than 200-300 BTU's may be recommended if the owner heats the pool intermittently. Larger heaters heat the pool faster, and for this reason may be more desirable for intermittent use. A smaller heater, such as a 100-200 BTU unit, may be used if the thermostat must maintain the pool at a consistent temperature. A pool cover can help the heater work more efficiently.