The 5 Best Pool Heaters of 2021

By The Spruce
Hayward HeatPro W3HP21104T Pool Heat Pump
"Best Overall"
SmartPool S601P SunHeater Solar Heating System
"Best Budget"
Hayward H-Series 100,000 BTU Propane Above Ground Pool Heater
"Best for Above Ground Pools"
Ecosmart US SMART POOL 27 Electric Tankless Pool Heater
"Best Electric"
Pentair UltraTemp High Performance Heat Pump
"Best Heat Pump"
Hayward HeatPro W3HP21004T Pool Heat Pump
"Best Overall"
Sta-Rite SR333LP Max-E-Therm Pool and Spa Heater
"Best Propane"