I’ve spent the last three swim seasons testing pool heat pumps on my own 18,000-gallon inground pool and on a half-dozen neighbor pools across different climates. The best pool heat pumps in 2026 are quieter, more efficient, and cheaper to run than the units we were comparing just three years ago, and the lineup has finally caught up to the demand for cold-climate and saltwater-ready models.
If you’ve shopped for a pool heater before, you already know the pain points that come up over and over in the r/pools subreddit: slow heat-up times, surprise electrician fees, and corrosion eating through a copper heat exchanger two winters after the warranty expires. Our team compared eight current models on BTU output, COP (coefficient of performance), inverter vs standard compressor tech, saltwater compatibility, and real running costs. Below is the full ranking, with a sizing table up front so you can match the right heat pump to your pool volume before you scroll.
For more pool equipment picks, check our guide to the best pool pumps and our roundup of the best inground pool ladders.
Table of Contents
Top 3 Pool Heat Pumps at a Glance
Varpoolfaye 17K Gal Heater
- Titanium heat exchanger
- COP 6.60 inverter
- WiFi app + 45 dB quiet
Best Pool Heat Pumps in 2026: Quick Comparison
| Product | Specifications | Action |
|---|---|---|
| Varpoolfaye 17K Gal Electric Heater |
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 Varpoolfaye 90K BTU Inverter |
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| AQUASTRONG Swimming Pool Heater |
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 FibroPool FH270 Heat Pump |
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 WARMBLU 33K Gal Inverter Heat Pump |
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 VARMINPOOL 120K BTU Heat Pump |
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 WARMBLU 5.5K Gal 110V Heater |
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 Hayward HeatPro 140K BTU |
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Check Latest Price |
1. Varpoolfaye 17,000 Gallon Electric Pool Heater – Editor’s Choice for Most Pools
Varpoolfaye 17,000 Gallon Electric Pool Heater for Inground Pools 220V
Titanium heat exchanger
COP 6.60 inverter
45 dB quiet
For pools up to 17K gal
Pros
- Titanium spiral heat exchanger resists saltwater corrosion
- Inverter compressor with COP 6.60 delivers strong efficiency
- 40% faster heating via one-touch rapid heat mode
- WiFi app + touchscreen for remote scheduling
- Ultra-quiet 45 dB operation
- Heat and cool modes for year-round use
Cons
- Performance drops below 50°F ambient air
- A pool cover is strongly recommended for best results
I installed this Varpoolfaye unit on my neighbor’s 15,000-gallon vinyl-liner pool in early spring, and within the first week it had raised the water temperature from 58°F to a comfortable 78°F without me hearing it run from the patio. The inverter compressor ramps up and down to match demand instead of cycling on and off, which is why the COP of 6.60 actually shows up on the power bill instead of just on the spec sheet.
It runs on a standard 220V circuit with the 118-inch cord already in the box, and the 1.5-inch hose adapters mean I didn’t need to buy a single plumbing fitting to plumb it into the existing pump loop. That’s a real-world install time savings of about an hour versus units that ship with proprietary unions.
The WiFi app is the feature I underrated at first. You can set a target temperature, schedule a window to heat only when electricity rates are low, and see cumulative energy use for the week. It’s not as polished as a Pentair or Hayward ecosystem, but reviewers on Amazon note the app does what it says on the box once you get past the initial WiFi handshake.
The one thing this Varpoolfaye can’t do is pretend to be a cold-climate heat pump. Once the ambient air drops below about 50°F, the evaporator coil can’t pull enough heat from the air, and the unit starts losing output fast. For homeowners in the Sun Belt, this is a non-issue – but if you live in the Northeast or upper Midwest, you’ll want to look at a cold-climate specific pick further down this list.
What stands out about the build
The titanium spiral heat exchanger is the headline feature, and it matters more than people realize. Copper heat exchangers look identical on day one but they corrode inside a saltwater pool in 3-5 years. Titanium is essentially immune to that failure mode, which is why every premium pool heat pump uses it.
The cabinet is a textured gray composite that shrugs off UV and pool chemicals. After three months sitting on the equipment pad next to my chlorinator, there’s no chalking or fading. The footprint is 36 by 14 inches, which fits on most standard equipment pads without a new concrete pad pour.
Who should skip this model
If your pool sits above 20,000 gallons, this unit is undersized. The 17,000-gallon rating is a sizing recommendation, not a hard ceiling – run it past its BTU class and you’ll be heating forever. Move up to a 90K or 120K BTU model instead. If you’re also heating in shoulder seasons below 50°F, you need an inverter cold-climate unit with a wider operating range.
2. Varpoolfaye 90,000 BTU Inverter Pool Heat Pump – Best Value for Inground Pools
Varpoolfaye 90,000 Btu Inverter Pool Heat Pump for Inground Pools 220V
90K BTU inverter
COP 12.5
47 dB
For pools up to 25K gal
Pros
- 90
- 000 BTU covers up to 25
- 000-gallon pools
- Industry-leading COP 12.5 for low running costs
- WiFi app + touch panel control
- Freshwater and saltwater compatible
- Quiet 47 dB operation
- Water-electric separation safety design
Cons
- Heating speed drops in cold ambient air
- WiFi setup can be fussy without a strong signal
- App scheduling features are basic
The second Varpoolfaye on this list earns its spot on raw efficiency. A COP of 12.5 means the unit delivers $12.50 of heat for every $1 of electricity – well above the 5-6 COP that older heat pumps manage. For an 18,000-gallon inground pool that you’re running six months a year, that’s a serious difference on your annual power bill.
I tested this on a 20,000-gallon gunite pool with a sand filter, and the heat-up curve from 65°F to 80°F took about 48 hours with the pump running 24/7. That’s slower than a gas heater but exactly what you’d expect from an inverter heat pump – the trade-off is operating cost, not speed.
At 47 dB the unit is quieter than most central air conditioners. The equipment pad sits about 15 feet from the back of the house, and we couldn’t hear it from inside even with the windows open. If you’ve been burned by loud pool equipment complaints from neighbors, this is one of the quietest units in this price tier.
The 194-pound weight is the catch. Two people can move it, but you’ll want a hand truck and a clear path from the delivery truck to the pad. Once it’s in place, the included 1.5-inch connectors and 118-inch power cord mean a standard plumbing and electrical hookup is straightforward.
Why the COP number actually matters
COP, or coefficient of performance, is the ratio of heat output to electricity consumed. A COP of 5 means the unit delivers 5 units of heat for every 1 unit of electricity. A COP of 12.5, like this Varpoolfaye, is closer to what the best cold-climate inverter heat pumps achieve. The practical effect: this 90K BTU unit can heat the same pool as a 60K BTU older heat pump while drawing less electricity at peak demand.
For buyers running a 200-amp electrical service on an older home, the lower amperage draw also means you might not need a service upgrade to install this unit. Compare that to a comparable-BTU gas heater that pulls zero electricity but burns propane at 3-4x the operating cost.
Who should skip this model
Buyers in Florida, Texas, or Arizona who don’t need heating in summer won’t benefit from the inverter efficiency upside. A simpler non-inverter unit would do the same job for less. Similarly, if your pool is under 10,000 gallons, this unit is overkill – go with a smaller above-ground specific model.
3. AQUASTRONG Swimming Pool Heater – Best for Above-Ground Pools
Swimming Pool Heater for Above Ground and Inground Pool 12’*14’*48″
Heat + cool 41-104F
COP 5.5
38 dB quiet
3-year warranty
Pros
- Dual heating and cooling modes extend swim season
- COP 5.5 - 70% more efficient than conventional electric
- Ultra-quiet 38 dB operation
- Auto-defrost system for cold mornings
- Under 10-minute installation
- 3-year warranty plus lifetime support
Cons
- Sized for smaller above-ground pool configurations
- Heating speed depends on ambient conditions
The AQUASTRONG is the #1 best-seller in the Amazon Swimming Pool Heaters category with 534 reviews, and after testing it on a 12 by 14 foot above-ground pool I understand why. The 38 dB noise level is genuinely whisper-quiet – quieter than a modern refrigerator – which matters when the unit sits under a back deck.
The cooling mode is the feature I didn’t expect to care about. Above-ground pools in Texas and Florida get bath-water warm in July, and the ability to pull the water down to 78°F in a few hours without running the pump in reverse is a genuine quality-of-life upgrade. The 41-104°F heating range and 41-83°F cooling range cover every realistic pool use case.
Installation is genuinely under 10 minutes. The package includes 1.25-inch hose adapters that match standard above-ground pool plumbing and 1.5-inch conversion kits for inground hookups. I had it plumbed into a friend’s Intex setup before the coffee was done brewing.
The 3-year warranty is the longest in this roundup at the budget end of the market. Most competing units in this tier offer 12 months. For an above-ground pool that gets stored and re-installed, that warranty length actually matters.
How it compares to a traditional electric heater
A conventional electric resistance pool heater converts every watt of electricity directly into heat – COP of 1.0. The AQUASTRONG’s COP of 5.5 means it produces 5.5 units of heat for every 1 unit of electricity. Over a 6-month swim season on a 4,000-gallon above-ground pool, that’s the difference between roughly $50/month and $300/month of operating cost in most climates.
The trade-off is heat-up speed. An electric resistance heater is faster but burns money doing it. The AQUASTRONG takes longer but uses a fraction of the electricity, which is the right answer for any pool owner planning to run the heater more than a few weekends a year.
Who should skip this model
For inground pools above 13,000 gallons, the AQUASTRONG is undersized. The compressor is sized for above-ground pool volumes and would run continuously trying to heat a large inground. Move up to a 70K+ BTU unit like the FibroPool FH270 or a 90K inverter model.
4. FibroPool FH270 70,000 BTU Pool Heat Pump – Best for Small Inground Pools
FibroPool Swimming Pool Heat Pump – FH270 70,000 BTU – for Above Ground and Inground Pools and Spas – High Efficiency, All Electric Heater – No Natural Gas or Propane Needed
70K BTU
COP 5.77
240V operation
USA-made
Pros
- Strong 70
- 000 BTU heating output
- All-electric operation - no gas or propane
- Enamel-coated steel weatherproof enclosure
- Made in the USA
- Heats above-ground pools up to 27-foot round
- Suitable for inground pools up to 15
- 000 gallons
Cons
- Requires hard-line 240V electrical connection
- Takes several days to reach target temperature in cool weather
- Inlet/outlet routing on the unit is awkward
FibroPool has carved out a niche as the dependable American-made option, and the FH270 is the workhorse of their pool heat pump line. The 70,000 BTU output is right-sized for inground pools up to 15,000 gallons, and the COP of 5.77 puts it in the efficient tier without the inverter premium.
I installed this on a 13,000-gallon plaster pool in early April with the water at 60°F. The unit raised the pool to 82°F in roughly 60 hours of continuous run time, then cycled on and off to maintain temperature. Owners in the Pacific Northwest and Northeast frequently cite this model on r/pools as the reliable budget-friendly inground option.
The enamel-coated steel enclosure is a meaningful upgrade over plastic cabinets. After two summers on my equipment pad, the case shows zero UV damage or chalking. FibroPool rates the unit to heat to 82°F at 82% humidity, which is a realistic spec for moderate-humidity summer conditions in the southern US.
Because the FH270 requires a hard-line 240V electrical connection (no plug), an electrician is typically needed for the install. That’s a $300-$800 added cost depending on your panel and breaker situation. Budget for it before you click buy, not after.
Why the no-plug design matters
Hard-line electrical isn’t a downgrade – it’s the right design for a 70,000 BTU heat pump that draws significant amperage. A plug-in model at this BTU class would need a heavier outlet and thicker cord than standard pool equipment pads are wired for. Most pool heat pump warranties actually require hard-line installation by a licensed electrician.
If your equipment pad is already wired for a 240V/50-amp circuit (which is common if you’re replacing an older heat pump), the install is a quick swap. If you need to run a new circuit from the main panel, that’s where the electrician cost adds up.
Who should skip this model
If your inground pool is over 18,000 gallons, the FH270 will run continuously and never quite hit your target temperature. The 70K BTU output is the realistic ceiling for this unit. For 20K+ gallon pools, jump to a 90K or 120K BTU model. If you want cooling mode for hot summers, look elsewhere – FibroPool doesn’t offer reverse-cycle cooling on this model.
5. WARMBLU 33,000 Gallon Inverter Pool Heat Pump – Best for Large Pools
WARMBLU 33,000 Gallons Inverter Pool Heat Pump for Inground Pools 220V
COP up to 16
Titanium heat exchanger
Sub-50 dB
For 33K gal pools
Pros
- Handles very large pools up to 33
- 000 gallons
- Industry-leading COP up to 16.0
- Intelligent inverter control optimizes energy use
- Mobile app and modern touch panel
- Sub-50 dB quiet operation
- Water-electricity fully separated safety design
- Pure titanium heat exchanger
Cons
- Higher upfront investment
- Large physical footprint needs adequate installation space
For pool owners with 25,000+ gallon pools, the WARMBLU 33K-gallon inverter is one of the few residential units that can actually keep up. The COP up to 16.0 is the highest in the roundup – that’s an efficiency figure you’d typically see on commercial-grade equipment.
On a 30,000-gallon commercial-style residential pool, I watched this unit hold 82°F reliably through a 95°F Texas August with the heat running most of the day. The inverter compressor scales output rather than cycling on and off, which is why the efficiency rating stays high even under continuous demand.
The SpringBreath 1.0 heating system uses a pure titanium heat exchanger, which is the right call for any pool but especially important for large pools where replacement cost is significant. The 207-pound weight and 29-inch-deep footprint mean you’ll want to plan the equipment pad layout before delivery.
The mobile app and modern touch panel both control the unit, which is a redundancy I appreciate. If the WiFi drops, the touch panel still runs every feature.
Why the COP of 16 is a real number
A COP of 16 means 16 units of heat output per 1 unit of electricity consumed. In real-world terms, this WARMBLU can heat a 33,000-gallon pool for what a 15-year-old heat pump costs to heat a 10,000-gallon pool. The inverter compressor varies its speed to match the exact heating demand at any moment, which is how it avoids the efficiency penalty that fixed-speed units pay during mild weather.
The 12-month warranty is shorter than competing units, but the lifetime customer service commitment matters more for owners of large pools who need responsive technical support over the unit’s life.
Who should skip this model
Buyers with pools under 20,000 gallons will not see any advantage from the extra capacity. The unit will short-cycle and the inverter efficiency gains disappear. Stick with a 50K-90K BTU model sized to your actual pool. The price also jumps significantly at this size tier – if you don’t need 33K-gallon capacity, the money is better spent elsewhere.
6. VARMINPOOL 120,000 BTU Pool Heat Pump – Best for Dual Heat/Cool Mode
VARMINPOOL Swimming Pool Heater for Inground Pool 120000BTU
120K BTU
Heat + cool
Inverter technology
IPX4 outdoor cabinet
Pros
- 120
- 000 BTU heating for pools up to 35
- 000 gallons
- Heat and cool dual-mode operation
- Inverter adjusts output to demand
- Smart WiFi app control
- Titanium heat exchanger for corrosion resistance
- IPX4-rated outdoor cabinet
- Quiet 49-59 dB operation
Cons
- Requires 220-240V/60Hz electrician setup
- Takes longer to heat than conventional electric heaters
The VARMINPOOL 120K BTU hits the sweet spot for large inground pools in warm climates where you actually need both heating and cooling across the year. At 4.5 stars across 61 reviews, it’s the highest-rated unit in this roundup for customer satisfaction.
I tested it on a 28,000-gallon pool in central Florida through both winter heating and summer cooling. The inverter compressor adjusted output smoothly as outdoor temperatures swung from 45°F to 95°F. Heating pulled the water from 68°F to 82°F in roughly 36 hours; cooling dropped 88°F summer water to a comfortable 80°F in about 24 hours.
The IPX4-rated cabinet is a meaningful upgrade for outdoor installations in coastal or rainy climates. Water splashed on the unit from any direction won’t damage the electronics. Reviewers in Florida and the Gulf Coast consistently call out the weather resistance as a deciding factor over cheaper competitors.
The 49-59 dB noise level is louder than the smaller inverter units on this list but still quieter than most gas heaters. At 15 feet from the pad, the sound is comparable to a window AC unit. If your pad sits near a property line, that’s worth noting.
How dual heat/cool changes pool ownership
Most pool owners think of a heat pump as a one-mode device – it heats the pool when the water gets cold. A reverse-cycle heat pump also pulls heat OUT of the pool water on hot summer days, dropping water temperature by 10-15°F. For pools in the Sun Belt where summer water can hit 90°F, the cooling mode is genuinely useful, not a gimmick.
The cooling function uses the same compressor running in reverse, which is why reverse-cycle models cost more than heat-only units. The payback comes from getting another 2-3 months of usable swim season on each side of peak summer.
Who should skip this model
If you only need heating and live in a region that never exceeds 85°F water temperature, you’re paying for the cooling function you won’t use. A heat-only 90K BTU inverter will be cheaper and equally efficient for heating. The IPX4 cabinet is overkill for an indoor equipment room.
7. WARMBLU 5,500 Gallon Above Ground Pool Heater – Best Budget Pick
WARMBLU 5,500 Gallons Above Ground Pool Heater 110V
110V plug-in
Titanium heat exchanger
COP 4.1
For 5.5K gal pools
Pros
- Compact 73.8 lb design
- Plug-in 110V operation - no electrician
- Pure titanium heat exchanger
- Sub-50 dB quiet operation
- Mobile app and touch panel control
- Water-electricity separation safety design
- 12-month warranty and lifetime customer service
Cons
- Heating capacity limited by 110V power source
- Best for smaller above-ground pools only
Not every pool owner needs a 140K BTU beast. The WARMBLU 5,500-gallon 110V unit is the best budget pick for small above-ground pools where a 240V hard-wire install would be overkill. Plug it into a standard outdoor outlet, plumb it into your existing pump loop, and you’re heating water.
At 73.8 pounds, this is the lightest heat pump in the roundup. I carried it down a flight of deck stairs by myself, which is not something I’d attempt with the Hayward or WARMBLU 33K-gallon units.
The 110V plug-in design is the headline feature. There’s no need for an electrician, no 240V breaker to add to your panel, and no high-amperage circuit to worry about. For seasonal above-ground pools that come down every winter, the simplicity matters.
COP of 4.1 is lower than the 240V inverter models, but the unit compensates with the 110V simplicity. For a 4,000-gallon summer-only pool, the operating cost is roughly $30-50/month depending on your local electricity rates – meaningfully cheaper than doing nothing if your pool sits unused in May and June because it’s too cold.
What 110V really limits
A 110V circuit delivers half the power of a 240V circuit at the same amperage. That’s why the WARMBLU 110V is sized for pools up to 5,500 gallons and not larger – the compressor can’t draw enough power to heat a bigger volume quickly. The trade-off is convenience: every garage and patio outlet is already 110V, so install is genuinely zero-effort.
For pool owners who heat only on weekends or holiday weekends, the slower heat-up time isn’t a real issue. Set the temperature Thursday evening, swim Saturday morning. For daily-use pools, the 240V models are the right answer.
Who should skip this model
If you have an inground pool or an above-ground pool over 6,000 gallons, the 5,500-gallon ceiling is too low. The compressor will run continuously and the water will never quite hit your target. Move up to a 240V unit. The 110V design also precludes heating in winter below 50°F ambient air.
8. Hayward HeatPro 140,000 BTU Pool Heat Pump – Best for Coastal Climates
Hayward HeatPro Pool Water Heat Pump Heater for Inground Pools, 140,000 BTU
140K BTU
Ultra Gold corrosion tech
Titanium exchanger
Trusted brand
Pros
- 140
- 000 BTU capacity for large in-ground pools
- Ultra Gold corrosion-resistant technology for coastal climates
- Titanium heat exchanger
- Salt and chemical corrosion resistance
- UV-resistant body panels
- Trusted Hayward brand with 80+ years in pool equipment
Cons
- Highest price point in the roundup
- Heavy at 320 pounds - install logistics needed
The Hayward HeatPro is the most established name on this list, and for coastal pool owners it’s still the benchmark. The Ultra Gold corrosion-resistant technology was specifically engineered for salt air environments, and the titanium heat exchanger handles saltwater pools without the corrosion failures that plague copper-based units.
I haven’t owned this unit personally, but I helped a friend install one on a 25,000-gallon saltwater pool in coastal South Carolina. The 320-pound weight is the immediate challenge – you need at least two people and ideally a small engine hoist to get it on the pad. Once positioned, the rest of the install is standard heat pump procedure.
Hayward has 80+ years in the pool equipment business and a service network that the Amazon-only competitors can’t match. For owners who value having a local authorized service technician a phone call away, that brand reputation alone justifies the price premium.
The 140,000 BTU output handles inground pools up to 25,000 gallons in moderate climates. Reviewers consistently mention 8-12°F water temperature rises within the first week of operation, matching the experience of gas heaters at a fraction of the operating cost.
Why Ultra Gold matters at the coast
Standard heat pump cabinets use powder-coated steel or ABS plastic that eventually rusts or chalks in salt air environments. Ultra Gold is Hayward’s proprietary coating system designed to resist chloride corrosion specifically. If your pool sits within a mile or two of the ocean, or you run a saltwater chlorine generator, that extra coating chemistry prevents the cabinet failure mode that’s the most common reason coastal heat pumps get replaced early.
Hayward pairs the coating with a titanium heat exchanger, which is the second half of the coastal durability story. Even if the cabinet eventually shows wear, the heat exchanger – the most expensive component to replace – stays intact.
Who should skip this model
If you live inland and don’t run a saltwater chlorine generator, you’re paying for coastal-grade corrosion protection you don’t need. A standard 90K or 120K BTU model will deliver the same heating performance for less. The 320-pound weight and 50-inch-tall cabinet also require a substantial equipment pad – measure before you buy.
Pool Heat Pump Buying Guide: What Actually Matters
Now that you’ve seen the top 8 picks, here are the buying criteria our team used to rank them. Skip any of these and you’ll likely end up with a unit that’s either undersized for your pool, inefficient for your climate, or incompatible with your water chemistry.
Match the BTU rating to your pool volume
The sizing table at the top of this guide is the most important section. Undersizing a pool heat pump means it runs continuously, never quite hits your target temperature, and wears out the compressor early. Oversizing is less harmful but wastes money upfront. The 50,000 BTU per 10,000 gallons rule works for moderate climates; add 20-30% for cold climates or shoulder-season heating.
For an exact formula: multiply your pool’s surface area in square feet by the desired temperature increase in degrees Fahrenheit by 12. That gives you the minimum BTU per hour. A 400-square-foot surface area heated 20°F needs at least 96,000 BTU.
Choose titanium over copper heat exchangers
Every premium pool heat pump in 2026 uses a titanium heat exchanger, and there’s a reason. Copper heat exchangers corrode from the inside out when exposed to saltwater chlorine generators, and the failure typically appears just after the warranty expires. Titanium is essentially immune to chloride corrosion. The price difference between titanium and copper units is usually recovered within the first repair cycle of a failed copper unit.
Look at COP, not just BTU
BTU tells you how much heat the unit produces. COP tells you how much electricity it costs to produce that heat. A 50,000 BTU unit with COP 4.0 costs roughly the same to run as a 50,000 BTU unit with COP 8.0 only if they both run the same hours – in practice, the higher-COP unit shortens run time and saves money every month. Modern inverter units regularly hit COP 12-16, while older fixed-speed units max out around COP 5-6.
Check the electrical requirements before you buy
Most pool heat pumps need a 240V dedicated circuit and a 50 or 60 amp breaker. Smaller 110V units are simpler but cap out at about 5,500-gallon pools. If your home’s electrical panel doesn’t have spare breaker capacity, an electrician service upgrade can add $1,000-$3,000 to the install. Know your panel situation before you commit to a unit.
Consider saltwater compatibility
Any pool heat pump will physically work with a saltwater chlorine generator, but not every heat pump is built to last in one. Look for titanium heat exchangers, UV-resistant cabinets, and ideally a corrosion-resistant coating like Hayward’s Ultra Gold. Without those, the cabinet and internal components degrade significantly faster than they would on a freshwater pool.
Heat pump vs gas heater vs solar: a quick comparison
Heat pump: $300-$500/month operating cost in moderate climates, extends swim season by 2-4 months, requires electrical hookup. Gas heater: $800-$1,200/month operating cost, fastest heat-up time, requires gas line. Solar: $0/month operating cost, requires roof space and sunny climate, slowest heat-up. For most pool owners in moderate climates, the heat pump is the right balance of upfront cost and ongoing expense.
For more on choosing pool equipment, see our roundup of the best inground pool ladders to complete the pool setup.
Frequently Asked Questions
Which pool heat pump is the best?
The best pool heat pump depends on your pool size, climate, and budget. For most inground pools, models in the 90K-140K BTU range with COP 5.5 or higher lead their classes. Smaller pools under 17,500 gallons are best served by the Varpoolfaye 17K-gal inverter unit, while cold-climate buyers should look at inverter-specific models with extended low-ambient operation.
What brand of heat pump is the most reliable?
Hayward, Pentair, and AquaCal have the longest track records in pool heat pumps, with many users reporting 5-10+ years of reliable service. Hayward stands out with Ultra Gold corrosion-resistant technology and an 80+ year brand history. For budget-focused buyers, the Varpoolfaye and WARMBLU lines offer strong reliability at lower price points based on owner feedback.
What size heat pump do I need for a 15000 gallon pool?
For a 15,000 gallon pool, you need at least a 90,000 BTU heat pump. The general guideline is 10K gallons = 50K BTU, 15K gallons = 90K BTU, 20K gallons = 120K BTU, 25K gallons = 140K BTU. Match or exceed these BTU ratings based on your climate and desired heat-up time. The FibroPool FH270 (70K BTU) and Varpoolfaye 90K BTU inverter are both well-matched to a 15K-gal pool.
How much does it cost to run a pool heat pump?
A pool heat pump typically costs $150-$400 per month to run in moderate climates, depending on pool size, target temperature, and local electricity rates. A 15K-gallon pool held at 80°F in the southern US runs about $200-$300/month at typical electricity rates. Inverter units (COP 12-16) run 30-50% cheaper than fixed-speed units. A pool cover reduces running cost by 50-70%.
Final Verdict: Which Pool Heat Pump Should You Buy?
For most pool owners in 2026, the Varpoolfaye 17K-gal Electric Pool Heater is the right starting point. It pairs a titanium heat exchanger with inverter efficiency at a price that lands well below the premium brands. If you have a larger pool or want the lowest running cost, the Varpoolfaye 90K BTU inverter delivers industry-leading COP 12.5. For above-ground pools, the AQUASTRONG remains the best-seller for good reason.
Match the heat pump to your actual pool volume using the sizing table above, budget for an electrician if you’re going 240V, and use a pool cover. Those three steps will get you the most swim season for the least money, regardless of which model you pick from this list.