Best Gas Spa Heaters

Hayward H250FDN Universal H-Series 250,000 BTU Pool and Spa Heater, Natural Gas, Low Nox

FibroPool Swimming Pool Heat Pump - FH120 20,000 BTU - for Above and In Ground Pools and Spas - High Efficiency, All Electric Heater - No Natural Gas or Propane Needed

Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater

SPA Heater Tube Assembly + Sensors by Hydroquip (for Balboa 4 Kw Heater Tube Assembly + Sensors PN)

WECIYGG Mini Swimming Pool Heat Pump 12000 BTU for Above Ground Pools, 3.5 kW Electric Pool Heater with Titanium Heat Exchanger, 110V 60Hz, Up to 2000 Gallons

Pentair 460743 Air Blower Replacement Kit MasterTemp 250 Pool and Spa Natural Gas Heater

Pentair 77707-0253 Combustion Air Blower Replacement Kit Pool and Spa Natural Gas Heater

Hayward FDXLGSV0001 FD Natural Gas Valve Replacement for Hayward Universal H-Series Low Nox Pool Heater

Raypak 013464F PC Board Control Replacement Kit for Digital Gas Heater

Pentair 42001-0051S Combination Gas Control Valve Kit Replacement Pool and Spa Heater