How Long Does It Take To Heat A Pool With An Electric Heater. Pool heaters are roughly 4 times as powerful, meaning a hot tub heater would take significantly longer to heat a pool. Heat pumps usually take heat from the surrounding air by compressing and decompressing refrigerant at different stages.
The variables include factors like ambient air and water temperature, wind speed, hours of sun, if it is direct or in the shade, surface area exposed to. Don’t worry, there’s not a literal robin hood heat avenger stealing heat from other pools and adding it to your own. A 400mj/hr gas heater will heat the spa water in approximately 40 minutes which seems about as long as most customers want to wait around to heat their spa water.
It can take anywhere from 3 to 8 hours for hot tubs to reach the desired temperature.
Say for example you opt to choose the electrical resistance heater. This means you can turn on the heater a few hours before hopping into a warm pool. How long should a heater last? But we can give you a pretty standard answer: