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Free WYBOT F1 Skimmer with Select Raypak Heaters!
Free WYBOT F1 Skimmer with Select Raypak Heaters!

Natural Gas and Propane Pool Heaters

Raypak 266A Digital Natural Gas Heater, P-R266A-EN-C 009217 009221

Raypak
Original price $3,179.00 - Original price $3,179.00
Original price
$3,179.00
$3,179.00 - $3,179.00
Current price $3,179.00
In stock

Raypak Digital 266A 266 BTU Natural Gas Heater, 009217 PR266AENC The Raypak Digital Gas Pool and Spa Heater delivers reliable, energy-efficient hea...

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Original price $3,179.00 - Original price $3,179.00
Original price
$3,179.00
$3,179.00 - $3,179.00
Current price $3,179.00

Pentair MasterTemp Natural Gas Heater – 175K 200K 250K 300K 400K BTU

Pentair Pool
Original price $3,399.99 - Original price $4,399.99
Original price
$3,399.99 - $4,399.99
$3,399.99 - $4,399.99
Current price $3,399.99
In stock

Pentair MasterTemp® High Performance Pool & Spa Heater Save money and energy with the MasterTemp High-Performance Heater. Already known as bein...

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Original price $3,399.99 - Original price $4,399.99
Original price
$3,399.99 - $4,399.99
$3,399.99 - $4,399.99
Current price $3,399.99

Raypak 266A Digital Natural Gas Heater, Cupronickel, P-R266A-EN-X 014939

Raypak
Original price $3,633.00 - Original price $3,633.00
Original price
$3,633.00
$3,633.00 - $3,633.00
Current price $3,633.00
In stock

Raypak 266A Digital Natural Gas Heater, Cupronickel, P-R266A-EN-X 014939 The Raypak Digital Gas Pool & Spa Heater delivers reliable, energy-eff...

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Original price $3,633.00 - Original price $3,633.00
Original price
$3,633.00
$3,633.00 - $3,633.00
Current price $3,633.00

Raypak 406A Digital Natural Gas Heater, Cupronickel, P-R406A-EN-X 014941, 406K BTU

Raypak
Original price $4,540.00 - Original price $4,540.00
Original price
$4,540.00
$4,540.00 - $4,540.00
Current price $4,540.00
In stock

Raypak 014951 Digital Electronic Cupro Nickel Natural Gas Pool and Spa Heater #51 406K BTU The Raypak Digital Gas Pool & Spa Heater delivers re...

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Original price $4,540.00 - Original price $4,540.00
Original price
$4,540.00
$4,540.00 - $4,540.00
Current price $4,540.00

Raypak 206A Digital Natural Gas Heater, P-R206A-EN-C 009216

Raypak
Original price $2,838.00 - Original price $2,838.00
Original price
$2,838.00
$2,838.00 - $2,838.00
Current price $2,838.00
In stock

Raypak 206A Digital Natural Gas Heater, P-R206A-EN-C 009216 The Raypak Digital Gas Pool & Spa Heater delivers reliable, energy-efficient heatin...

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Original price $2,838.00 - Original price $2,838.00
Original price
$2,838.00
$2,838.00 - $2,838.00
Current price $2,838.00

Raypak AVIA HD 404A Natural Gas Heater – NiTek, Wi-Fi, P-R404A-EN-N 018045, Low NOx

Raypak
Original price $4,780.00 - Original price $4,780.00
Original price
$4,780.00
$4,780.00 - $4,780.00
Current price $4,780.00
In stock

Raypak AVIA HD 399K BTU Natural Gas Heater 404A – NiTek, Low NOx, Wi-Fi (P-R404A-EN-N, 018045) The AVIA HD pool heater features built-in Wi-Fi and ...

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Original price $4,780.00 - Original price $4,780.00
Original price
$4,780.00
$4,780.00 - $4,780.00
Current price $4,780.00

Pentair MasterTemp 400 Natural Gas Heater, 460736, 400K BTU

Pentair Pool
In stock

Pentair MasterTemp® 460736 Digital High Performance Low NOx Pool and Spa Heater; 400K BTU, Natural Gas The MasterTemp pool heater sets the industry...

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Pentair 460772 MasterTemp 250 ASME Propane Heater LP

Pentair Pool
In stock

Pentair MasterTemp® 460772 Digital IID ASME High Performance Liquid Propane Low NOx Pool and Spa Heater 250K BTU MasterTemp Heaters offer all the e...

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Raypak AVIA HD 264A Natural Gas Heater – NiTek, Wi-Fi, P-R264A-EN-N 018044, Low NOx

Raypak
Original price $3,890.00 - Original price $3,890.00
Original price
$3,890.00
$3,890.00 - $3,890.00
Current price $3,890.00
In stock

Raypak AVIA HD 264K BTU Natural Gas Heater – NiTek, Low NOx, Wi-Fi (P-R264A-EN-N, 018044) The AVIA HD pool heater features built-in Wi-Fi and the R...

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Original price $3,890.00 - Original price $3,890.00
Original price
$3,890.00
$3,890.00 - $3,890.00
Current price $3,890.00

Raypak AVIA 264A Natural Gas Heater Wi-Fi, P-R264A-EN-C 018032, Low NOx

Raypak
Original price $3,391.00 - Original price $3,391.00
Original price
$3,391.00
$3,391.00 - $3,391.00
Current price $3,391.00
In stock

Raypak AVIA 264K BTU Natural Gas Heater 264A – Low NOx, Wi-Fi 018032 P-R264A-EN-C Smart Control: AVIA features built-in Wi-Fi and works seamlessl...

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Original price $3,391.00 - Original price $3,391.00
Original price
$3,391.00
$3,391.00 - $3,391.00
Current price $3,391.00

Raypak 266A Digital Propane Heater, P-R266A-EP-C #57 009225

Raypak
Original price $3,179.00 - Original price $3,179.00
Original price
$3,179.00
$3,179.00 - $3,179.00
Current price $3,179.00
In stock

Raypak 266A Digital Propane Heater, P-R266A-EP-C #57 009225 The Raypak Digital Gas Pool & Spa Heater delivers reliable, energy-efficient heatin...

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Original price $3,179.00 - Original price $3,179.00
Original price
$3,179.00
$3,179.00 - $3,179.00
Current price $3,179.00

Pentair MasterTemp 400HD Natural Gas Heater, Cupronickel, 460805, 400K BTU

Pentair Pool
In stock

Pentair MasterTemp® 460805 Pool and Spa Heater; 400HD BTU, Natural Gas, Cupro-Nickel Tubing MASTERTEMP® HD Heavy Duty Heater: The MasterTemp HD is ...

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Pentair MasterTemp 250 Natural Gas Heater, 460732

Pentair Pool
In stock

Pentair MasterTemp® 460732 Digital High Performance Low NOx Pool and Spa Heater; 250K BTU, Natural Gas Save money and energy with the MasterTemp Hi...

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Hayward 135K BTU H-Series Natural Gas Above Ground Heater, W3H135FDN, Low NOx

Hayward
Original price $2,399.00 - Original price $2,399.00
Original price
$2,399.00
$2,399.00 - $2,399.00
Current price $2,399.00
In stock

Hayward H-Series W3H135FDN Natural Gas Heater 135K BTU The Hayward H-Series W3H135FDN 135K BTU Natural Gas Heater for above-ground pools and spas d...

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Original price $2,399.00 - Original price $2,399.00
Original price
$2,399.00
$2,399.00 - $2,399.00
Current price $2,399.00

Raypak AVIA 264A Propane Heater Wi-Fi, P-R264A-EP-C 018038, Low NOx

Raypak
Original price $3,391.00 - Original price $3,391.00
Original price
$3,391.00
$3,391.00 - $3,391.00
Current price $3,391.00
In stock

Raypak AVIA 264K BTU Propane Heater 264A – Low NOx, Wi-Fi 018038 P-R264A-EP-C Smart Control: AVIA features built-in Wi-Fi and works seamlessly wi...

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Original price $3,391.00 - Original price $3,391.00
Original price
$3,391.00
$3,391.00 - $3,391.00
Current price $3,391.00

Pentair Sta-Rite Max-E-Therm 333 Propane Gas Heater, SR333LP

Pentair Pool
In stock

Pentair Max-E-Therm® SR333LP Liquid Propane Gas Pool & Spa Heater 333K BTU; Cupro-Nickel Tubing For indoor or outdoor installations on pools an...

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Raypak 406A Digital LP Propane Heater, P-R406A-EP-C 009227, 399K BTU

Raypak
Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00
In stock

Raypak Digital Gas Pool & Spa Heater (206A-406A) Efficient, Durable, and Smart Heating The Raypak Digital Gas Pool & Spa Heater delivers re...

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Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00

Raypak 156A Digital Electronic Natural Gas Heater 150K BTU, 014784 P-R156A-EN-C

Raypak
Original price $2,499.00 - Original price $2,499.00
Original price
$2,499.00
$2,499.00 - $2,499.00
Current price $2,499.00
In stock

Raypak 014784 P-R156A-EN-C 156A Digital Electronic Natural Gas Heater for Above Ground Pools 150K BTU Raypak Natural Gas Digital Heater 150K BTU fe...

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Original price $2,499.00 - Original price $2,499.00
Original price
$2,499.00
$2,499.00 - $2,499.00
Current price $2,499.00

Raypak 406A Digital Natural Gas Heater, P-R406A-EN-C 009219 009223, 406K BTU

Raypak
Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00
In stock

Raypak Digital Gas Pool & Spa Heater (206A-406A) Efficient, Durable, and Smart Heating The Raypak Digital Gas Pool & Spa Heater delivers r...

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Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00

Pentair Sta-Rite Max-E-Therm 400 Propane Gas Heater, SR400LP, 400K BTU

Pentair Pool
In stock

Pentair Max-E-Therm® SR400LP Liquid Propane Pool & Spa Heater 400K BTU For indoor or outdoor installations on pools and spas. Features include ...

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Raypak 206A Digital Propane Heater, P-R206A-EP-C 009224

Raypak
Original price $2,999.00 - Original price $2,999.00
Original price
$2,999.00
$2,999.00 - $2,999.00
Current price $2,999.00
In stock

Raypak 206A Digital Propane Heater, P-R206A-EP-C 009224 The Raypak Digital Gas Pool & Spa Heater delivers reliable, energy-efficient heating wi...

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Original price $2,999.00 - Original price $2,999.00
Original price
$2,999.00
$2,999.00 - $2,999.00
Current price $2,999.00

Pentair Sta-Rite Max-E-Therm 200 Natural Gas Heater, SR200NA

Pentair Pool
In stock

Pentair Max-E-Therm® SR200NA 200 Natural Gas Pool & Spa Heater 200K BTU For indoor or outdoor installations on pools and spas. Features include...

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Pentair Sta-Rite Max-E-Therm 400 HD Natural Gas Pool Heater, Cupronickel, SR400HD, 400K BTU

Pentair Pool
In stock

Pentair Max-E-Therm® SR400HD 400 HD Natural Gas Pool & Spa Heater 400K BTUYour Pool Heater Just Got a Whole Lot Smarter Save money and energy w...

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Raypak 266A Digital Propane Heater, Cupronickel, P-R266A-EP-X 014951

Raypak
Original price $3,633.00 - Original price $3,633.00
Original price
$3,633.00
$3,633.00 - $3,633.00
Current price $3,633.00
In stock

Raypak Digital Gas Pool & Spa Heater (206A-406A) The Raypak Digital Gas Pool & Spa Heater delivers reliable, energy-efficient heating with ...

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Original price $3,633.00 - Original price $3,633.00
Original price
$3,633.00
$3,633.00 - $3,633.00
Current price $3,633.00

Raypak AVIA 404A Natural Gas Heater Wi-Fi, P-R404A-EN-C 018033, Low NOx

Raypak
Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00
In stock

Raypak AVIA 399K BTU Natural Gas Heater R404A – Low NOx, Wi-Fi018033 P-R404A-EN-C Smart Control: AVIA features built-in Wi-Fi and works seamlessl...

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Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00

Pentair Sta-Rite Max-E-Therm 400 Natural Gas Heater, SR400NA, 400K BTU

Pentair Pool
In stock

Pentair Max-E-Therm® SR400NA 400 Natural Gas Pool & Spa Heater 400K BTU; Cupro-Nickel Tubing For indoor or outdoor installations on pools and s...

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Pentair MasterTemp 250HD Natural Gas Heater, Cupronickel, 460806

Pentair Pool
In stock

Pentair MasterTemp® 460806 Low NOx Pool and Spa Heater; 250HD BTU, Natural Gas, Cupro-Nickel Tubing MASTERTEMP® HD Heavy Duty Heater: The MasterTem...

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Raypak 156A Digital Electronic Propane Heater 150K BTU, 014786 P-R156A-EP-C

Raypak
Original price $2,289.00 - Original price $2,289.00
Original price $2,289.00
$2,499.00
$2,499.00 - $2,499.00
Current price $2,499.00
In stock

Raypak 156A Digital Propane Gas 150K BTU Pool Heater for 0-1,999' Elevation is efficient and easy to use, the perfect choice for above-ground pools...

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Original price $2,289.00 - Original price $2,289.00
Original price $2,289.00
$2,499.00
$2,499.00 - $2,499.00
Current price $2,499.00

Raypak 336A Digital Natural Gas Heater, P-R336A-EN-C 009218

Raypak
Original price $3,632.00 - Original price $3,632.00
Original price
$3,632.00
$3,632.00 - $3,632.00
Current price $3,632.00
In stock

Raypak 336A Digital Natural Gas Heater, P-R336A-EN-C 009218 Efficient, Durable, and Smart Heating The Raypak Digital Gas Pool & Spa Heater deli...

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Original price $3,632.00 - Original price $3,632.00
Original price
$3,632.00
$3,632.00 - $3,632.00
Current price $3,632.00

Pentair MasterTemp 250 Natural Gas Heater, EC-462026

Pentair Pool
Original price $3,739.00 - Original price $3,739.00
Original price
$3,739.00
$3,739.00 - $3,739.00
Current price $3,739.00
In stock

The MasterTemp Heater provides energy-saving and advanced operating features that are available only from much larger heaters. With its revolutiona...

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Original price $3,739.00 - Original price $3,739.00
Original price
$3,739.00
$3,739.00 - $3,739.00
Current price $3,739.00

Raypak 336A Digital Natural Gas Heater, Cupronickel, P-R336A-EN-X 014940, 332K BTU

Raypak
Original price $4,087.00 - Original price $4,087.00
Original price
$4,087.00
$4,087.00 - $4,087.00
Current price $4,087.00
In stock

Raypak Digital Gas Pool & Spa Heater (206A-406A) Efficient, Durable, and Smart Heating The Raypak Digital Gas Pool & Spa Heater delivers re...

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Original price $4,087.00 - Original price $4,087.00
Original price
$4,087.00
$4,087.00 - $4,087.00
Current price $4,087.00

Raypak AVIA 404A Propane Heater – Wi-Fi, P-R404A-EP-C 018039, Low NOx

Raypak
Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00
In stock

Raypak AVIA 399K BTU Propane Heater 404A – Low NOx, Wi-Fi018039 P-R404A-EP-C Smart Control: AVIA features built-in Wi-Fi and works seamlessly wit...

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Original price $4,200.00 - Original price $4,200.00
Original price
$4,200.00
$4,200.00 - $4,200.00
Current price $4,200.00

Raypak 106A Above Ground Gas Heater – P-R106A-AN-C 014779, P-R106A-AP-C 014781

Raypak
Original price $2,099.00 - Original price $2,099.00
Original price
$2,099.00
$2,099.00 - $2,099.00
Current price $2,099.00
In stock

Strong as Steel & Dependable The Raypak 106A is the ideal choice for above-ground pools and spas. While it may be Raypak's smallest heater, it ...

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Original price $2,099.00 - Original price $2,099.00
Original price
$2,099.00
$2,099.00 - $2,099.00
Current price $2,099.00

Raypak 406A Digital LP Propane Heater, Cupronickel, P-R406A-EP-X 014953

Raypak
Original price $4,540.00 - Original price $4,540.00
Original price
$4,540.00
$4,540.00 - $4,540.00
Current price $4,540.00
In stock

Raypak Digital Gas Pool & Spa Heater (206A-406A) Efficient, Durable, and Smart Heating The Raypak Digital Gas Pool & Spa Heater delivers re...

View full details
Original price $4,540.00 - Original price $4,540.00
Original price
$4,540.00
$4,540.00 - $4,540.00
Current price $4,540.00

Pentair MasterTemp 125 Natural Gas Heater, EC-462024 461059

Pentair Pool
Original price $2,249.00 - Original price $2,249.00
Original price
$2,249.00
$2,249.00 - $2,249.00
Current price $2,249.00
In stock

The MasterTemp 125 Heater provides energy-saving and advanced operating features available only from much larger heaters. With its revolutionary pr...

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Original price $2,249.00 - Original price $2,249.00
Original price
$2,249.00
$2,249.00 - $2,249.00
Current price $2,249.00

Pentair MasterTemp 400 ASME HD Natural Gas Heater Bronze Headers, Cupronickel, 461021

Pentair Pool
In stock

Pentair MasterTemp® 461021 Digital IID Heavy-Duty High Performance Natural Gas Low NOx Pool and Spa Heater with Cupro Nickel Tubing 400K ASME HD BT...

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Hayward 250K BTU H-Series Natural Gas Heater, Cupronickel, W3H250FDN, Low NOx

Hayward
Original price $3,999.00 - Original price $3,999.00
Original price
$3,999.00
$3,999.00 - $3,999.00
Current price $3,999.00
In stock

Hayward 250K BTU H-Series Natural Gas Heater, Cupronickel, W3H250FDN The Hayward Universal H-Series gas heater is the “universal” energy-efficient ...

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Original price $3,999.00 - Original price $3,999.00
Original price
$3,999.00
$3,999.00 - $3,999.00
Current price $3,999.00

Pentair Sta-Rite Max-E-Therm 333 Natural Gas Heater, SR333NA

Pentair Pool
In stock

Pentair Max-E-Therm® SR333NA 333 Natural Gas Pool & Spa Heater 333K BTU For indoor or outdoor installations on pools and spas. Features include...

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Raypak AVIA HD 264A Propane Heater – NiTek, Wi-Fi, P-R264A-EP-N 018050, Low NOx

Raypak
Original price $3,890.00 - Original price $3,890.00
Original price
$3,890.00
$3,890.00 - $3,890.00
Current price $3,890.00
In stock

Raypak AVIA HD 264K BTU Propane Heater 264A – NiTek, Low NOx, Wi-Fi (P-R264A-EP-N, 018050) The AVIA HD pool heater features built-in Wi-Fi and the ...

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Original price $3,890.00 - Original price $3,890.00
Original price
$3,890.00
$3,890.00 - $3,890.00
Current price $3,890.00

Raypak 206A Digital Natural Gas Heater, Cupronickel, P-R206A-EN-X 014938

Raypak
Original price $3,291.00 - Original price $3,291.00
Original price
$3,291.00
$3,291.00 - $3,291.00
Current price $3,291.00
In stock

Raypak 014938 Digital Electronic Cupro Nickel Natural Gas Pool and Spa Heater #51 180K BTU The Raypak Digital Gas Pool & Spa Heater delivers re...

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Original price $3,291.00 - Original price $3,291.00
Original price
$3,291.00
$3,291.00 - $3,291.00
Current price $3,291.00

Raypak 206A Digital Natural Gas Heater 2000'-6000', P-R206A-EN-C 009220 #51

Raypak
Original price $2,838.00 - Original price $2,838.00
Original price
$2,838.00
$2,838.00 - $2,838.00
Current price $2,838.00
In stock

Raypak 009220 206A Digital Natural Gas Heater with Copper Heat Exchanger, Elevation 2000'-6000' 199.5 BTUH The Raypak Digital Gas Pool & Spa H...

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Original price $2,838.00 - Original price $2,838.00
Original price
$2,838.00
$2,838.00 - $2,838.00
Current price $2,838.00

Pentair Sta-Rite Max-E-Therm 200 Propane Gas Heater, SR200LP

Pentair Pool
In stock

Pentair Max-E-Therm® SR200LP Heater; 200K BTU, Liquid Propane For indoor or outdoor installations on pools and spas. Features include an LCD temper...

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Ruud AVIA HD 404A Natural Gas Pool Heater NiTek Wi-Fi, P-D404A-EN-N 018105

Ruud
Original price $4,780.00
Original price $4,780.00 - Original price $4,780.00
Original price $4,780.00
Current price $4,299.00
$4,299.00 - $4,299.00
Current price $4,299.00
In stock

AVIA HD 399K BTU Natural Gas Heater – NiTek, Low NOx, Wi-Fi The AVIA HD pool heater features built-in Wi-Fi and the Raymote app for seamless contro...

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Original price $4,780.00
Original price $4,780.00 - Original price $4,780.00
Original price $4,780.00
Current price $4,299.00
$4,299.00 - $4,299.00
Current price $4,299.00
Sale Sale

Hayward 150K BTU H-Series Natural Gas Heater, Cupronickel, W3H150FDN, Low NOx

Hayward
Original price $2,999.00 - Original price $2,999.00
Original price
$2,999.00
$2,999.00 - $2,999.00
Current price $2,999.00
In stock

Hayward 150K BTU H-Series Natural Gas Heater, Cupronickel, W3H150FDN The Hayward Universal H-Series Pool and Spa Gas Heaters are known for their en...

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Original price $2,999.00 - Original price $2,999.00
Original price
$2,999.00
$2,999.00 - $2,999.00
Current price $2,999.00

Pentair MasterTemp 250 ASME HD Natural Gas Heater Bronze Headers, Cupronickel, 461020

Pentair Pool
In stock

Pentair MasterTemp® 461020 Digital IID Heavy-Duty ASME High Performance Natural Gas Low NOx Pool and Spa Heater with Cupro Nickel Tubing 250K BTU U...

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Pentair ETi 400 Natural Gas Heater ASME, 461113

Pentair Pool
In stock

Pentair ETi® 400 High Efficiency Natural Gas Pool Heater 400000 BTU ASME, 461113 The Pentair ETi 400 Natural Gas Pool & Spa Heater 461113 bring...

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Pentair MasterTemp 200 Natural Gas Heater, 460730

Pentair Pool
In stock

Pentair MasterTemp® 460730 Digital High Performance Low NOx Pool and Spa Heater; Natural Gas, 200K BTU The MasterTemp pool heater sets the industry...

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Raypak 408A Professional ASME Digital Gas Heater Brass Headers, Cupronickel 013731, 013732

Raypak
Original price $7,130.00 - Original price $7,130.00
Original price
$7,130.00
$7,130.00 - $7,130.00
Current price $7,130.00
In stock

Built for Commercial Durability The Raypak Professional Pool and Spa Heater is specifically designed for commercial properties, making it an ideal...

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Original price $7,130.00 - Original price $7,130.00
Original price
$7,130.00
$7,130.00 - $7,130.00
Current price $7,130.00

Residential Gas Pool Heaters: Premium Heating Solutions for Your Home Swimming Pool

Keep your pool at the perfect temperature year-round with a gas pool heater from top brands like Pentair, Raypak, and Hayward. Propane pool heaters are ideal for quick heating and reliable performance, making them a great choice for homeowners who want to enjoy their pool in any season.

At Vita Pool Supply, we proudly carry the best residential gas pool heaters from industry-leading brands, including Pentair, Raypak, and Hayward. Enjoy free freight shipping and our 100% customer satisfaction guarantee with every purchase. Keep your pool warm and inviting with the right propane gas swimming pool heater for your needs.

Frequently Asked Questions 

How much does it cost to run a gas pool heater?

The average cost to operate a gas pool heater typically ranges from $200 to $400 per month. While gas heaters provide the fastest heating times, their ongoing operational costs are influenced by several key factors including pool size, geographic location, and heating requirements. 

What is the most efficient way to run a gas pool heater?

The most efficient way to run a gas pool heater is to maintain a consistent temperature between 78°F and 80°F. Because energy consumption increases significantly for every degree the temperature is raised, keeping the water at a moderate "swimming" temperature rather than a "spa" temperature is the most cost-effective approach.

How long does it take to heat a pool from 65 to 85?

Heating a swimming pool from 65°F to 85°F (a 20°F rise) typically takes anywhere from 12 to over 52 hours. The exact duration depends primarily on the type of heating system you use, the volume of water, and environmental conditions. Gas heaters are the most powerful, typically raising water temperatures by 1°F to 2.5°F per hour.