Best Gas Spa Heaters

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

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

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

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

ArrogantF 4.0KW 240V Univeral Heater Element Replacement for Balboa Spa Heater Element 4.0 KW 58104 or Flo-Thru Hot Tub Spas Electric Heaters (10 inch)

Dgqtrx 4kw 240v Hot Tub Heater Element Replacement for Balboa Spa Heating Element for Spas Electric Heater

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

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

ArrogantF Hot Tub Sensor for Balboa Spa Heater M7 System 24" Temp/Hi Limit,1/4" Diameter for Balboa Spa Sensor Parts Hot Tub Heater Replacement Sensor 32016 30344 30042 30382, 2 Pack

Hayward IDXLFLS1930 Flame Sensor Replacement for Hayward Universal H-Series Induced Draft and Gas Heater