Home Pool Heaters Over 125K BTUs + Inground

Pool Heaters

Swimming Pool Heaters - Heat Pumps and Gas Heaters for Every Pool

This collection covers every pool heater we carry - electric heat pumps and gas heaters for above-ground pools, in-ground pools, and spas. Heat pumps use electricity to pull heat from the air and are the most efficient choice for pools used regularly in warm climates. Gas heaters burn propane or natural gas for immediate full-output heating at any air temperature, making them the right choice for fast heat-up, cold climates, or pools that sit unused for long stretches. Use the table below to find the right fit, or use the quiz to get a recommendation based on your specific setup.

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All Pool Heaters - Full Lineup by Pool Size

Pool Size	Unit	BTUs	Type / Mode	Price
Up to 5,000 gal	FibroPool FH120	20,000	Heat/Cool	from $975
Up to 5,000 gal	FibroPool FH220	20,000	Heat/Cool	$1,146
Up to 7,500 gal	FibroPool FH135	35,000	Heat/Cool	from $956
	FibroPool FH235-i	35,000	Heat/Cool Inverter	$1,470
	Madimack InverECO 32K	32,000	Heat/Cool Inverter	$2,110
Up to 10,000 gal	FibroPool FH255	55,000	Heat/Cool	from $1,853
Up to 10,000 gal	Madimack InverECO 40K	40,000	Heat/Cool Inverter	$2,450
Up to 12,000 gal	Madimack InverECO 50K	50,000	Heat/Cool Inverter	$2,680
Up to 12,000 gal	Hayward HeatPro 50K	50,000	Heat/Cool	$2,999
Up to 15,000 gal	FibroPool FH270	70,000	Heat/Cool	from $1,935
	AquaCal T70 TropiCal	63,000	Heat/Cool Inverter Spa mode	$3,311
	Madimack InverECO 66K	66,000	Heat/Cool Inverter	$3,115
	GulfStream HE110 RA	115,000	Heat Only Spa mode	$3,895
Up to 17,500 gal	FibroPool FH285-i	85,000	Heat/Cool Inverter Spa mode	from $2,386
Up to 20,000 gal	Hayward HeatPro 100K	100,000	Heat/Cool	$5,499
	Madimack InverELITE 84K	84,000	Heat/Cool Inverter Spa mode	$6,230
	Madimack InverTitan 90K	90,000	Heat/Cool Inverter Spa mode	$5,000
	GulfStream HE125 TA	118,000	Heat/Cool Spa mode	$4,695
Up to 23,000 gal	GulfStream HE125 RA	125,000	Heat Only Spa mode	$4,095
Up to 25,000 gal	Hayward HeatPro 140K	140,000	Heat Only	$6,999
	AquaCal SQ140R	114,000	Heat/Cool Inverter Spa mode	$4,652
	AquaCal T100 TropiCal	108,000	Heat/Cool Inverter Spa mode	$4,770
	Madimack InverELITE 116K	116,000	Heat/Cool Inverter Spa mode	$6,900
	Madimack InverTitan 112K	112,000	Heat/Cool Inverter Spa mode	$5,790
	Hayward H135 (Natural Gas)	135,000	Gas Heat Only Spa mode	$2,399
	Hayward H135 (Propane)	135,000	Gas Heat Only Spa mode	$2,399
Up to 27,000 gal	GulfStream HE150 RA	142,000	Heat Only Spa mode	$4,495
Up to 30,000 gal	AquaCal T130 TropiCal	123,000	Heat/Cool Inverter Spa mode	$5,519
Up to 30,000 gal	GulfStream HE150 TA	137,000	Heat/Cool Spa mode	$5,095
Up to 30,000 gal	AquaCal SQ160R	128,000	Heat/Cool Inverter Spa mode	$5,316
Up to 30,000 gal	AquaCal SQ200R	138,000	Heat/Cool Inverter Spa mode	$6,450
Up to 35,000 gal	Hayward H150 (Natural Gas)	150,000	Gas Heat Only Spa mode	$2,999
Up to 35,000 gal	Hayward H150 (Propane)	150,000	Gas Heat Only Spa mode	$2,999
Up to 45,000 gal	Hayward H200 (Natural Gas)	200,000	Gas Heat Only Spa mode	$3,699
Up to 45,000 gal	Hayward H200 (Propane)	200,000	Gas Heat Only Spa mode	$3,699
Up to 50,000 gal	Hayward H250 (Natural Gas)	250,000	Gas Heat Only Spa mode	$3,999
Up to 50,000 gal	Hayward H250 (Propane)	250,000	Gas Heat Only Spa mode	$3,999
Up to 80,000 gal	Hayward H400 (Natural Gas)	400,000	Gas Heat Only Spa mode	$5,099
Up to 80,000 gal	Hayward H400 (Propane)	400,000	Gas Heat Only Spa mode	$5,099

Heat pumps require a 220-240V circuit (smaller FibroPool models: 110-120V). No gas line needed. Gas heaters require a propane tank or natural gas line plus a 120/240V circuit. Heat/Cool units both heat and chill. Heat Only costs less upfront. Inverter models run quieter and use less electricity. Cold-climate buyers should size up one tier on heat pumps. Spa mode units can heat to 104°F for spa/hot tub use.

How to Choose the Right Pool Heater

Heat Pump Best for pools used regularly in warm climates. 70-80% lower monthly operating cost than gas. Many models also cool. No gas line needed.

Gas Heater Best for fast heat-up, cold climates, or pools that sit unused for stretches. Full output at any air temperature. Requires a gas line or propane tank.

Inverter vs. Standard Inverter heat pumps vary their output based on demand - quieter, more efficient, longer lifespan. Standard models are simpler and cost less upfront.

Above-Ground vs. In-Ground Most products here work for in-ground pools. The smaller FibroPool and Hayward H135 models are designed for above-ground pools and spas.

Questions? We Match Buyers to the Right Heater Every Day

Not sure where to start? Call us at 800-809-3741 or use the quiz above. We'll help you match a heater to your pool size, climate, fuel availability, and budget. We also connect you with licensed local installers through our installation support program.

Pool Heater FAQs

What is the difference between a pool heat pump and a gas heater?

A heat pump uses electricity to extract heat from the surrounding air and transfer it into the pool water. It does not generate heat - it moves it - which is why operating costs are so much lower than gas. The tradeoff is recovery speed and cold-weather performance. A gas heater burns propane or natural gas to generate heat directly, which works at any air temperature and heats the pool faster from cold. For most pools used regularly in warm climates, a heat pump is the better long-term value. For fast heat-up, cold climates, or pools used occasionally, gas is the right tool.

What size pool heater do I need?

Use the table above as a starting point based on your pool volume. For heat pumps, sizing is about temperature maintenance - match the BTU range to your pool size and climate. In colder climates, size up one tier. For gas heaters, sizing is about recovery speed - a bigger unit heats your pool faster. If you are unsure, call us at 800-809-3741 or use the quiz at the top of this page.

Why do some higher-BTU heat pumps cover a smaller pool than lower-BTU models?

BTU output is only one part of the sizing equation for a heat pump. Manufacturers also factor in the efficiency of the heat exchanger design, the compressor type, and the operating conditions each unit is rated for. An inverter heat pump with 115,000 BTUs may be rated for a smaller pool than you would expect because the manufacturer has tested and rated it conservatively based on real-world conditions - accounting for heat loss, overnight temperature drop, and sustained heating demand over a full season. A standard (non-inverter) unit with a similar BTU rating may carry a higher pool size rating because it runs at full capacity continuously, while the inverter model modulates down. This is not a flaw - inverter units are quieter, more energy-efficient, and have a longer lifespan precisely because they do not run flat-out. If your pool sits at the boundary between two models, sizing up is always the safer call, particularly in climates where nighttime temperatures fall below 60 degrees.

Can a pool heater also cool the pool?

Most heat pump models in this collection include cooling capability, letting you lower pool temperature in summer. This is particularly useful in Florida, Texas, and Arizona where water temperatures can reach the low 90s in August. Gas heaters cannot cool the pool.

Does a pool heater need a gas line?

Only if you buy a gas heater. All heat pump models in this collection run on electricity only - no gas line required. Gas heaters require either a natural gas supply line or a propane tank, plus a small electrical connection for the control system.

Do you offer installation?

Yes. Visit our installation support page for details on connecting with a licensed installer in your area. Gas heater installation requires a licensed contractor in most jurisdictions.