Pool Heating & Cooling: Heaters

Pool and spa heaters designed to deliver consistent, comfortable water temperatures in any season.

  • Save 33% Out of stock
    PENTAIR WATER POOL AND SPA INC AUTOHEAT PUMP CONTACTOR 473603Z | 473603Z
    SKU: 473603Z
    $292.70
    $440
    Out of stock
  • Save 33%
    PENTAIR WATER POOL AND SPA INC REPL AIR FLOW SWITCH ASSY ETI250 | 476365
    SKU: 476365
    $217.18
    $326
    In stock
  • Save 33%
    Pentair MasterTemp 125 Thermal Regulator | 474989
    Pentair MasterTemp 125 Thermal Regulator | 474989
    SKU: 474989
    $70.74
    $107
    In stock
  • Save 33%
    PENTAIR WATER POOL AND SPA INC REPL BURNER F/ POOL HEATER ETI250 | 476383
    SKU: 476383
    $198.55
    $298
    In stock
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    PENTAIR UNION AND TIEDWN RPLC ULTRATEMP
    SKU: 461030Z
    $76.73
    $116
    In stock
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    Pentair MasterTemp 125 Union 1.5" Kit | 474974
    SKU: 474974
    $75.96
    $114
    In stock
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    PENTAIR WATER POOL AND SPA INC REPL CONTROL COVER F/ ETI HTR 475619 | 475619
    SKU: 475619
    $32.63
    $49
    In stock
  • Save 34%
    PENTAIR WATER POOL AND SPA INC REPLACEMENT BLOWER GASKET ETI250 | 476421
    SKU: 476421
    $28.76
    $44
    In stock
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    PENTAIR WATER POOL AND SPA INC HEAT EXCHANGER OUTLET FITTING ETI250 ETI400 GAS | 461104
    SKU: 461104
    $91.34
    $138
    In stock
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    PENTAIR WATER POOL AND SPA INC REPL WATER BYPASS ASSY F/ HTR ETI250 | 476380
    SKU: 476380
    $61.10
    $92
    In stock
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    PENTAIR WATER POOL AND SPA INC REPL VALVE ASSY F/ POOL HEATER ETI250 GAS | 476409
    SKU: 476409
    $432.74
    $650
    In stock
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    PENTAIR WATER POOL AND SPA INC REPL CONDENSATE FLT SW ASSY 476366 | 476366
    SKU: 476366
    $247.39
    $372
    In stock
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    PENTAIR WATER POOL AND SPA INC HEAT EXCHANGER INLET FITTING ETI250 ETI400 GAS | 461103
    SKU: 461103
    $91.34
    $138
    In stock
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    PENTAIR WATER POOL AND SPA INC REPL CONTROL BOARD ASSY 476384 | 476384
    SKU: 476384
    $169.34
    $255
    In stock
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    PENTAIR WATER POOL AND SPA INC IGNITION CONTROL MODULE REPL 476385 | 476385
    SKU: 476385
    $269.01
    $404
    In stock
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    PENTAIR WATER POOL AND SPA INC FAN MOTOR W/ACORN NUT MINIMAX PLUS | 470289
    SKU: 470289
    $271.64
    $408
    In stock
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    PENTAIR WATER POOL AND SPA INC RUBBER IN/OUT BUSHING 070544 2" ID MINIMAX PLUS | 070544
    SKU: 070544
    $19.45
    $30
    Out of stock
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    LOCHINVAR CORPORATION CAST IRON ASME HEATER ERN-152-A 100143200 150KBTU NG | 100143200
    SKU: 100143200
    $3,344.90
    $5,018
    In stock
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    LOCHINVAR CORPORATION CAST IRON ASME HEATER ERN-202-A 100143209 200KBTU NG | 100143209
    SKU: 100143209
    $3,801.25
    $5,702
    In stock
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    LOCHINVAR CORPORATION CAST IRON ASME HEATER ERL-202-A 100143162 200KBTU LP | 100143162
    SKU: 100143162
    $4,055.81
    $6,084
    Out of stock
  • Save 48%
    LOCHINVAR CORPORATION NG IID ASME ENERGYRITE CN HEATER ERN402-A-8009 100143241 400K | 100143241
    LOCHINVAR CORPORATION NG IID ASME ENERGYRITE CN HEATER ERN402-A-8009 100143241 400K | 100143241
    SKU: 100143241
    $4,599
    $8,940
    In stock
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    LOCHINVAR CORPORATION CAST IRON ASME HEATER ERN-302-A 100143227 300KBTU NG | 100143227
    SKU: 100143227
    $3,896.65
    $5,845
    Out of stock
  • Save 33% Out of stock
    LOCHINVAR ENERGYRITE-399K BTU - NAT GAS ASME
    SKU: 100143240
    $4,583.11
    $6,875
    Out of stock
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    LOCHINVAR CORPORATION ENERGYRITE HTR W/ CU-NI EXCH ERN202-A-8009 199K BTUH | ERN202-A-8009
    SKU: ERN202-A-8009
    $3,929.67
    $5,895
    Out of stock