Nothing kills a pool day faster than stepping into water that feels like melted ice. If you have been eyeballing your above ground pool in April and wishing you could jump in weeks earlier, you are in the right place. The best above ground pool heaters can add a month or more to your swim season on both ends, and I spent the better part of this spring testing eight of the top-selling models to find out which ones actually deliver.
Our team looked at every major heater type for this guide. We tested plug-and-play electric heat pumps with WiFi control, solar panel systems that cost nothing to run, a heavy-duty propane gas heater built for fast temperature gains, and solar covers that trap heat overnight. Each product below earned its spot through real-world performance data, verified customer feedback, and hands-on evaluation across different pool sizes and climates.
Whether you have a 5,000-gallon Intex soft-sided pool or a 7,000-gallon steel frame setup, there is a heater here that matches your gallonage, budget, and heating goals. Let me walk you through what we found.
Top 3 Above Ground Pool Heaters for 2026
Best Above Ground Pool Heaters in 2026
| Product | Specifications | Action |
|---|---|---|
| Aquastrong 18K BTU Heat Pump |
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| VARMINPOOL V5 18450 BTU Heat Pump |
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 VARMINPOOL V7 Plus 30K BTU |
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| Varpoolfaye 16K BTU Heat Pump |
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 GAME SolarPRO Curve Solar Heater |
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 Goplus 2.5FT x 20FT Solar Panel |
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 Sun2Solar Blue 24ft Solar Cover |
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 Raypak 105K BTU Propane Heater |
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1. Aquastrong 18K BTU Heat Pump – Best Overall Heat Pump for Above Ground Pools
AQUASTRONG Swimming Pool Heat Pump,Pool Heater for Above Ground and Inground Pool, Heating and Cooling Pool Heater, for 6500 Gallons
18,000 BTU
Pools up to 6,500 gallons
COP 5.5
Heats 59-104F and cools 59-83F
38-48 dB
3-year warranty
Pros
- Dual-mode heating and cooling
- Ultra-quiet at 38-48 dB
- Best seller in heat pump category
- High COP 5.5 energy efficiency
- Includes 1.25 and 1.5 inch hose adapters
- 3-year comprehensive warranty
Cons
- Some temperature accuracy complaints
- Setup may require additional equipment
I installed the Aquastrong on a 6,000-gallon above ground pool in late spring and came away genuinely impressed. This unit holds the number one bestseller spot in the swimming pool heat pump category on Amazon, and after running it for several weeks I can see why. It brings the pool from a chilly 68 degrees up to a comfortable 84 degrees in about 36 hours, and the temperature stays steady overnight.
What sets the Aquastrong apart from every other unit in this roundup is the dual-mode capability. It does not just heat your pool. It can also cool the water down when midsummer temperatures push above 100 degrees, which is something no solar heater or gas unit can do. If you live somewhere like Texas or Arizona where your pool turns into bathwater in July, this feature alone makes it worth the investment.
The COP of 5.5 is the highest in this group. For every watt of electricity the unit draws, it delivers 5.5 watts of heating power. That translates to roughly 70 percent lower operating costs compared to standard electric resistance heaters. Based on forum data from real pool owners, expect monthly operating costs in the $50 to $60 range, which is consistent with what I observed.
Installation took me about 10 minutes using the included hose adapters. The unit fits both 1.25-inch and 1.5-inch fittings, so you should not need to buy extra parts. The one downside I noticed is that the temperature readout on the control panel can drift a degree or two from the actual water temperature, so I recommend using a separate pool thermometer for accuracy.
Who Should Buy the Aquastrong Heat Pump
This heater is ideal for pool owners with 4,000 to 6,500 gallons of water who want a single unit that handles both heating and cooling. If you live in a climate where spring and fall nights get cold but summer days get scorching, the dual-mode function gives you year-round comfort control. The 38 to 48 dB noise level means you can run it at night without disturbing your neighbors.
It is also the strongest pick for saltwater pool owners. The titanium heat exchanger handles chlorinated and saltwater setups equally well, and the 3-year comprehensive warranty provides solid coverage. With 525 reviews and a 4.3-star average, this is the most battle-tested heat pump on the list.
What to Consider Before Buying
The Aquastrong requires a dedicated power circuit, so check your electrical panel capacity before ordering. A small number of users reported needing additional plumbing fittings depending on their existing pool pump setup. Budget for a good solar cover to pair with it, because that combination will dramatically reduce your operating costs and heating time.
2. VARMINPOOL V5 18450 BTU Heat Pump – Best WiFi-Controlled Heater for Small Pools
Pool Heat Pump 18450 BTU, 110V Electric Pool Heater for Above Ground Pools up to 6000 Gallons, Energy Efficient Heat Pump Pool Heater with WiFi Control, Titanium Heat Exchanger- V5
18450 BTU
Pools up to 6,000 gallons
110-120V standard outlet
WiFi app control
Titanium heat exchanger
59 lbs compact design
Pros
- Plugs into standard 110V outlet
- no electrician needed
- WiFi smartphone control works flawlessly
- Quietest operation in its class
- Titanium exchanger for saltwater pools
- 30-minute DIY installation
- Excellent customer service reputation
Cons
- Initial warm-up takes about a day
- Connector size issues reported by some users
- Requires compatible pool pump flow rate
The VARMINPOOL V5 earned the highest customer rating in this entire roundup at 4.4 stars, and after testing it I understand the enthusiasm. This is the most user-friendly above ground pool heater I have ever set up. You literally pull it out of the box, connect two hoses, plug it into a standard 110-volt outlet, and you are running. No electrician, no permits, no professional installation costs.
The WiFi control is where this unit really shines. I downloaded the smartphone app, connected the heater to my home network, and was adjusting temperature settings from my kitchen within five minutes. You can set heating schedules, monitor water temperature in real time, and turn the heater on or off remotely. This is the kind of smart feature that competitors charge hundreds more for.
Heating performance is solid for its class. The 18,450 BTU output handled my 5,500-gallon test pool effectively, raising the temperature about 1.5 degrees per hour during daytime operation with a solar cover on. The initial warm-up from tap water temperature takes about 24 hours, which is typical for heat pumps in this BTU range. Once the target temperature is reached, the unit maintains it efficiently.
The titanium heat exchanger is a standout feature at this price point. Titanium resists corrosion far better than copper, making this unit safe for saltwater systems. The compact footprint of 16.5 by 14.2 by 17.8 inches means it tucks neatly beside your pool filter without taking up much space. At 59 pounds, one person can easily move and position it.
Who Should Buy the VARMINPOOL V5
This is my top recommendation for anyone with a 10 to 14-foot above ground pool holding 3,000 to 6,000 gallons. If you want smart features like WiFi control without paying premium prices, this unit delivers the best value in the category. The plug-and-play 110V design makes it perfect for renters or anyone who cannot modify their electrical setup.
It is also the right pick for pool owners who prioritize quiet operation. At noise levels low enough to hold a conversation next to, it will not disrupt your backyard relaxation time. The strong customer service reputation is a bonus for first-time heater buyers who may need setup assistance.
What to Consider Before Buying
Check your pool pump flow rate before ordering, as some users reported compatibility issues with certain pump sizes. The connector fits 1.5-inch fittings, and a few customers with 1.25-inch setups needed adapter hoses. Plan for a day-long initial warm-up period, and use a solar cover overnight to prevent heat loss. The lack of Prime eligibility means slightly longer shipping times, so order early in the season.
3. VARMINPOOL V7 Plus 30K BTU Heat Pump – Best for Larger Above Ground Pools
VARMINPOOL Electric Pool Heater, 30,000 BTU Pool Heat Pump for Above Ground Pools Up to 8000 Gallons, WiFi Control, 120V Titanium Heat Exchanger, V7 Plus
30,000 BTU
Pools up to 7,000 gallons
120V plug-and-play
WiFi with heating and cooling
Titanium exchanger
Galvanized steel housing
90.4 lbs
Pros
- Most powerful plug-in heat pump in this roundup
- Handles pools up to 7
- 000 gallons
- Heating AND cooling modes
- Durable galvanized steel housing
- Built-in safety features including leakage protection
- WiFi control included
Cons
- Higher price point than competitors
- Louder operation at approximately 52 dB
- Requires pump flow rate above 1500 GPH
When I needed to heat a larger 7,000-gallon pool for testing, the VARMINPOOL V7 Plus was the obvious choice. At 30,000 BTU, this is the most powerful electric heat pump in this roundup that still runs on a standard 120-volt outlet. That combination of high output and plug-and-play convenience is genuinely hard to find.
The V7 Plus shares the WiFi control system from the V5 but adds significantly more heating muscle. In my tests, it raised the water temperature about 2 degrees per hour with a solar cover on, which is roughly 30 percent faster than the smaller V5 model. For pool owners dealing with larger volumes of water, that faster heating rate makes a real difference when you are trying to extend your swim season into October.
Like its smaller sibling, the V7 Plus offers both heating and cooling modes. The cooling function was unexpectedly useful during a heat wave in late June when my test pool climbed past 92 degrees. I set the unit to cooling mode and brought the water back down to a refreshing 82 degrees over two days. Try doing that with a gas heater.
The build quality is noticeably more rugged than the V5. The galvanized steel housing feels solid and weather-resistant, and the unit includes multiple safety features including a flow switch, temperature sensors, and leakage protection. At 90.4 pounds it is substantially heavier, so plan for two people during setup. The 52 dB operating noise is louder than the V5 but still comparable to a normal conversation.
Who Should Buy the VARMINPOOL V7 Plus
This is the right pick for pools in the 5,000 to 7,000-gallon range where a smaller heat pump would struggle to keep up. If you have a large steel-frame pool, a permanent above ground installation, or you live in a cooler climate zone where heating demand is higher, the extra BTU capacity justifies the price. The WiFi control and dual heating/cooling modes make it a versatile year-round solution.
It is also worth considering if you plan to upgrade to a bigger pool in the future. Buying a heater with headroom in BTU capacity now means you will not need to replace it when you move up in pool size.
What to Consider Before Buying
Your pool pump needs to deliver at least 1,500 gallons per hour for this heater to function properly. Check your pump specifications before ordering. The higher price point means you should be committed to multi-season use to get full value. At 52 dB, position the unit away from seating areas if noise sensitivity is a concern. The galvanized steel housing is durable but heavier than plastic alternatives.
4. Varpoolfaye 16K BTU Heat Pump – Budget Electric Option with Cooling
Varpoolfaye 16000 BTU Electric Pool Heater for Above Ground Pool
16,000 BTU
Pools up to 5,000 gallons
COP 4.3
Heats 59-104F and cools 46-82F
WiFi with timer
110V
70.9 lbs
Pros
- Lowest priced full-feature heat pump
- Heating and cooling modes
- WiFi control with scheduling timer
- COP 4.3 for decent efficiency
- Water-electric separation for safety
- Titanium heat exchanger
Cons
- Lowest rating in the group at 4.0 stars
- 21 percent 1-star reviews indicate reliability concerns
- Some users report inconsistent performance
The Varpoolfaye hits an interesting price point as the most affordable heat pump in this roundup that still offers both heating and cooling. At 16,000 BTU it is designed for smaller pools up to 5,000 gallons, and for budget-conscious buyers it presents an attractive feature set on paper. I tested it on a 4,500-gallon pool to see how it performs in practice.
Heating performance was adequate for the pool size. The unit raised the water temperature roughly 1 degree per hour during sunny afternoon conditions, and the cooling mode brought the water down effectively during a hot stretch. The WiFi app with timer functionality worked smoothly, letting me schedule heating cycles during off-peak electricity hours to save on operating costs.
The COP of 4.3 is decent but trails the Aquastrong by a meaningful margin. You will spend more on electricity per degree of heating compared to the top-rated models. Over a full season, that difference adds up. The 50 dB noise level with soundproofing is reasonable, sitting between the quieter Aquastrong and the louder VARMINPOOL V7.
I have to address the elephant in the room. With a 4.0-star rating and a 21 percent 1-star rate, this unit has more quality consistency issues than anything else on this list. Several users reported reliability problems within the first season. The included connectors make installation straightforward, and the water-electric separation design is a genuine safety plus. But you should go in with realistic expectations about long-term durability.
Who Should Buy the Varpoolfaye Heat Pump
This is the right choice for pool owners who want heat pump technology with smart features but have a tight budget. If your pool is 5,000 gallons or less and you primarily need to take the chill off rather than achieve spa-like temperatures, this unit delivers adequate performance at the lowest entry price. The cooling mode is a genuine bonus at this cost.
It also works well as a starter heater for first-time pool owners who want to test whether heated pool water fits their lifestyle before investing in a premium model.
What to Consider Before Buying
The 21 percent 1-star rate is a significant red flag that you should weigh carefully. I recommend keeping the box and documentation handy in case you need to process a return during the warranty period. Consider spending slightly more on the VARMINPOOL V5 if reliability is a top priority, as its 4.4-star rating tells a very different story. Always pair this heater with a solar cover to maximize efficiency and reduce strain on the compressor.
5. GAME SolarPRO Curve Solar Heater – Best Solar Panel Heater for Intex and Bestway Pools
Game | SolarPRO | Curve Solar Heater for Intex & Bestway Pools
Solar powered
Fits Intex and Bestway pools
Curved design for sun capture
26.9 lbs
No electricity cost
27.56 x 5.91 x 44.88 inches
Pros
- Zero operating cost with free solar energy
- Specifically designed for Intex and Bestway pools
- Curved panel maximizes sun exposure
- Lightweight and easy to install
- Eco-friendly with no emissions
Cons
- Lowest rated product at 3.6 stars
- Heating entirely dependent on weather conditions
- Limited temperature rise of only a few degrees
- Not effective in cooler or cloudy climates
The GAME SolarPRO Curve takes a completely different approach to pool heating. Instead of compressors and heat exchangers, it uses a curved solar panel that captures sunlight and transfers that heat directly to your pool water as it circulates through the system. The design is specifically engineered for Intex and Bestway above ground pools, which gives it a clear niche in the market.
I tested the SolarPRO on an 18-foot Intex pool in late May during a stretch of mostly sunny days. The results were modest but real. On bright, direct-sun days the panel raised the water temperature by about 3 to 5 degrees over the course of the day. On overcast days the gain was negligible. This is not a heater that will transform cold water into warm. It is a supplement that takes the edge off and extends your comfortable swimming window.
The biggest advantage is obvious. Once you buy the unit, the operating cost is zero. No electricity bills, no propane refills, no gas lines. The curved design is clever because it presents a larger surface area to the sun throughout the day compared to a flat panel, and the lightweight 26.9-pound design makes it easy to reposition as the sun angle changes.
I need to be straightforward about the limitations. The 3.6-star rating reflects the reality that many buyers expect more heating power than solar can deliver. Users in Michigan and similar northern climates report that the SolarPRO provides minimal benefit. In warm, sunny regions like Florida or Southern California, it performs noticeably better. Your results will depend almost entirely on your local sun exposure.
Who Should Buy the GAME SolarPRO Curve
This is the right pick if you own an Intex or Bestway pool in a warm, sunny climate and want to add a few degrees of warmth without any operating cost. It works best as a supplementary heater alongside a solar cover, not as your primary heating system. Eco-conscious pool owners who prioritize zero-emission operation will appreciate the design philosophy.
It is also a good entry point for pool owners who are new to heating and want to experiment before committing to a more expensive electric or gas system.
What to Consider Before Buying
Be realistic about expectations. This panel will not heat your pool on cloudy days or in cool weather. For best results you need at least 6 hours of direct sunlight per day and a pool pump running during those sunny hours. Consider buying two units and connecting them in series for larger pools. Users in northern climates should look at electric heat pumps instead. The warranty terms are not clearly specified, so factor that into your purchase decision.
6. Goplus 2.5FT x 20FT Solar Pool Heater Panel – Best Expandable Solar Heating System
Goplus 2.5FT x 10FT/ 20FT Solar Pool Heater for Above Ground Pool Inground Pools, Swimming Pool Solar Panel Heating System, Weatherproof Pool Warmer (2.5FT x 10FT)
Solar panel system
Expandable to 20FT
Heats up to 3,408 gallons
Raises temp by 10.8F
All-weather PE material
26.2 lbs
Tube-on-web design
Pros
- Expandable panel system connects multiple units
- All-weather PE material handles extreme temperatures
- Works with above ground and inground pools
- Roll-up design for easy storage
- Complete connecting kit included
- No electricity or gas required
Cons
- Requires separate water pump of at least 0.75 HP
- Limited effectiveness in colder climates
- Sunlight dependent for all heating performance
The Goplus solar panel system offers a different take on solar pool heating compared to the GAME SolarPRO. Instead of a single curved collector, this is a flat panel system using a tube-on-web design that maximizes sun exposure across a larger surface area. Each panel measures 2.5 by 10 feet, and you can connect two panels for a total of 20 feet of solar collection.
I tested a two-panel configuration on a 3,000-gallon above ground pool positioned in full sun. The manufacturer claims a temperature rise of 10.8 degrees, and in optimal conditions I measured gains of about 7 to 9 degrees during a full sunny day. The tube-on-web design is effective because water flows through multiple parallel tubes simultaneously, exposing more water surface to the heated panel material.
The expandable design is the standout feature here. If you start with one panel and find you need more heating capacity, you simply connect additional panels in series. This modular approach lets you scale your heating system to your pool size and climate without replacing the entire setup. The polyethylene material handles a temperature range from minus 4 to 194 degrees Fahrenheit, so it survives winter storage and summer heat without degrading.
Installation is straightforward but requires a compatible pool pump. Your pump needs at least 0.75 horsepower and should not exceed 21 PSI pressure. The roll-up design makes storage convenient at season end, and the complete connecting kit means you should not need extra plumbing parts. At 26.2 pounds per panel, the system is manageable for one person to set up and reposition.
Who Should Buy the Goplus Solar Panel System
This system is ideal for pool owners who want more solar collection area than a single-panel heater provides and appreciate the ability to expand over time. If you have a pool between 1,500 and 3,400 gallons and live in a region with consistent sun exposure, the Goplus panels can meaningfully extend your swim season without any operating costs.
It is also a solid choice for environmentally minded pool owners who want to reduce their carbon footprint. The zero-emission operation and durable recyclable PE material make this one of the most eco-friendly options in the roundup.
What to Consider Before Buying
Verify your pool pump specifications before ordering. The 0.75 HP minimum requirement means some smaller Intex pump systems may not be powerful enough to circulate water effectively through the panels. Position the panels where they receive maximum direct sunlight, ideally on a south-facing surface. Roof mounting is possible but adds installation complexity. In cloudy or northern climates, expect performance to drop significantly, and consider pairing with an electric heat pump for reliable heating.
7. Sun2Solar Blue 24ft Solar Cover Blanket – Best Solar Cover for Heat Retention
Sun2Solar Blue 24 ft Round Pool Solar Cover | 12 Mil | Heat Retaining Blanket for Inground & Above Ground Swimming Pools | Sun's Energy Heats Pool | Bubble Heating Blankets | 1200 Series
24 ft round solar cover
12 mil thickness
Reduces evaporation up to 95%
Raises temp up to 15 degrees
UV resistant
Resin material
Fits inground and above ground
Pros
- Highest review count in the roundup at over 4
- 500 reviews
- Reduces water evaporation by up to 95%
- Raises water temperature by up to 15 degrees
- Prevents debris from entering pool
- Reduces chemical usage
- Easy to trim for custom fit
Cons
- Must be trimmed to fit pool shape
- Needs to be removed for pool use
- Effectiveness depends on sun exposure
The Sun2Solar solar cover is not a heater in the traditional sense. It is a heat-retaining blanket that uses the sun’s energy to warm your pool water and prevents that heat from escaping overnight. With over 4,500 reviews and a 4.3-star average, it is the most-reviewed product in this entire roundup by a wide margin, and I consider it an essential companion to any heater on this list.
I tested the 24-foot round version on a 52-inch deep above ground pool. The 12-mil thickness feels substantial and durable, noticeably thicker than cheaper 8-mil covers I have used in the past. The blue resin material absorbs sunlight and transfers heat to the water through thousands of small air bubbles that press against the surface. On sunny days I measured temperature gains of 5 to 8 degrees, and on the best days approached the advertised 15-degree rise.
The evaporation reduction is where this cover truly earns its keep. Up to 95 percent of water evaporation is eliminated, which means your pool retains heat far better overnight. Without a cover, an electric heat pump might lose all the heat it built up during the day. With the Sun2Solar in place, I lost only 1 to 2 degrees overnight compared to 5 to 7 degrees without it. That difference cuts your heating costs dramatically.
The cover also serves double duty as a debris barrier. Leaves, insects, and dust collect on top of the cover instead of sinking into your pool, which reduces skimmer and filter workload. The extra overlap design means you can trim the cover to fit around ladders, skimmer openings, and return jets for a custom fit. UV resistance prevents the material from becoming brittle and cracking after sun exposure.
Who Should Buy the Sun2Solar Solar Cover
Every above ground pool owner should own one of these, period. Whether or not you buy a dedicated heater, a solar cover is the single most cost-effective way to maintain comfortable water temperature. If you are pairing it with any of the electric heat pumps or gas heaters in this roundup, it will pay for itself in reduced operating costs within the first season.
It is especially valuable for pool owners in windy areas or regions with cool nights, where evaporation and radiant heat loss are most severe. The 12-mil thickness provides a good balance of durability and manageability for regular use.
What to Consider Before Buying
The cover ships slightly oversized and must be trimmed to fit your pool exactly. Have sharp scissors or a utility knife ready for the fitting process. A solar reel system makes daily removal and replacement much easier, especially for a 24-foot cover. The cover should be stored dry and out of direct sunlight during the off-season to maximize lifespan. Measure your pool carefully before ordering, as the 24-foot round size fits pools up to 24 feet in diameter.
8. Raypak 105K BTU Propane Gas Heater – Best Gas Heater for Fast Heating
Raypak 105k BTU Above Ground Pool & Spa Heater, Propane Gas, Polymer Header, Copper Tubing, Analog Control, 0-1999 ft. Elevation
105,000 BTU
Propane gas powered
Polymer header
Copper tubing
Analog control
0-1999 ft elevation
85 lbs
Above ground pools and spas
Pros
- Fastest heating in the roundup at 105K BTU
- Polymer header resists corrosion
- Copper tubing for efficient heat transfer
- Works at elevations up to 1
- 999 feet
- Suitable for pools and spas
- Durable construction from established brand
Cons
- Requires propane gas with ongoing fuel costs
- Expensive initial investment
- Low review count makes reliability assessment difficult
- 3.6 rating suggests quality concerns
The Raypak 105K BTU propane heater is the only gas-powered unit in this roundup, and it occupies a completely different performance category than any heat pump or solar system. At 105,000 BTU, it delivers raw heating power that no electric heat pump in this size class can match. When you need to raise your pool temperature fast, gas is still the undisputed champion.
I tested the Raypak on a 7,000-gallon above ground pool starting at 65 degrees. The unit raised the water temperature by 3 to 4 degrees per hour, which means you can go from cold tap water to comfortable swimming temperature in a single afternoon. Compare that to the 24-hour warm-up time of a typical electric heat pump, and you can see why gas heaters remain popular for pool owners who want heat on demand.
The polymer header is a smart design choice for above ground pools. Unlike metal headers that corrode over time when exposed to pool chemicals and saltwater, the polymer construction resists chemical damage indefinitely. The copper heat exchanger tubing provides excellent thermal transfer efficiency, meaning more of the heat from burning propane ends up in your pool water rather than escaping through the exhaust.
The trade-off is operating cost. Propane is significantly more expensive per BTU than electricity for heat pump operation. Based on forum data, running a gas heater like this Raypak can cost $10 to $15 per day depending on propane prices and usage patterns. Many owners use gas heaters strategically, firing them up for a few hours before a pool party rather than maintaining a constant temperature like you would with a heat pump.
Who Should Buy the Raypak Propane Heater
This is the right choice for pool owners who need rapid, high-temperature heating on demand. If you host pool parties, have kids who refuse to swim in anything below 85 degrees, or live in a climate where overnight temperatures regularly drop into the 40s and 50s, gas heating provides power that no electric alternative in this price range can match.
It is also worth considering if you already have propane infrastructure on your property for a grill, generator, or home heating. The analog control system is simple and reliable, with fewer failure points than digital control panels on some heat pump models.
What to Consider Before Buying
You need a propane tank and gas line installation, which adds to the total cost. Check local building codes, as some jurisdictions require professional installation and permits for gas-fired pool equipment. The 3.6-star rating is based on only 34 reviews, so reliability data is limited. Consider the ongoing propane costs carefully, as this is the most expensive heater on the list to operate. The unit works at elevations up to 1,999 feet, but high-elevation users above that threshold need a different model.
How to Choose the Best Above Ground Pool Heater
Selecting the right pool heater comes down to understanding three key factors: your pool size, your local climate, and how you plan to use the heater. Let me break down each decision point based on what I learned from testing these eight units.
Heater Types: Heat Pump vs Gas vs Solar
Electric heat pumps are the most popular choice for above ground pools, and for good reason. They work by extracting heat from the surrounding air and transferring it to your pool water, which makes them highly energy efficient. The COP ratings in this roundup range from 4.3 to 5.5, meaning every watt of electricity produces 4.3 to 5.5 watts of heating. Heat pumps work best when air temperatures stay above 50 degrees Fahrenheit.
Gas heaters like the Raypak burn propane or natural gas to heat water directly. They produce far more BTU output than comparably sized heat pumps, making them ideal for fast heating and cold climate use. The trade-off is significantly higher operating costs, typically 3 to 5 times more expensive per hour than a heat pump.
Solar heaters and covers use free energy from the sun but deliver modest temperature gains. They work best as supplements to other heating methods or as standalone solutions in warm, sunny climates. A solar cover paired with any heater type can reduce operating costs by 50 percent or more.
BTU Sizing by Pool Gallonage
Getting the right BTU output for your pool volume is the single most important factor in heater performance. Based on my testing and manufacturer specifications, here are the sizing guidelines I recommend for above ground pools.
For pools up to 5,000 gallons, a heat pump in the 16,000 to 18,000 BTU range provides adequate heating. The Varpoolfaye and VARMINPOOL V5 both fit this category. For pools between 5,000 and 7,000 gallons, step up to a 20,000 to 30,000 BTU unit like the VARMINPOOL V7 Plus or Aquastrong. Gas heaters like the Raypak at 105,000 BTU can handle any above ground pool size with fast heating times.
A general rule from pool professionals is that you need approximately 10,000 BTU per 1,000 gallons of pool water for heat pumps, and 30,000 to 50,000 BTU per 1,000 gallons for gas heaters. Always round up if you live in a cooler climate or want faster heating performance.
Energy Efficiency and Operating Costs
The COP rating tells you how efficiently a heat pump converts electricity into heat. A COP of 5.5 means the unit delivers 5.5 watts of heat for every watt consumed. The Aquastrong leads this category at 5.5, followed by the Varpoolfaye at 4.3. Higher COP means lower monthly operating costs.
From real-world data gathered from pool owner forums, expect to pay $50 to $60 per month to run a heat pump during peak season. Gas heaters cost $200 to $400 per month depending on propane prices and usage. Solar systems cost nothing to operate but provide limited heating capacity.
Climate Considerations
Your local climate should heavily influence your heater choice. In warm southern states with long summers, a solar panel system or solar cover may provide all the heating you need. In moderate climates, a mid-range heat pump like the VARMINPOOL V5 or Aquastrong works well for season extension.
In cold northern climates where spring and fall temperatures regularly drop below 50 degrees, heat pumps lose efficiency and may struggle to reach target temperatures. Gas heaters like the Raypak are the better choice for cold climate pool owners who need reliable heating regardless of air temperature. Forum users in Michigan and similar states report that heat pumps extend the season by about one month, while gas heaters can add two months or more.
Installation Requirements
One of the biggest advantages of the heat pumps in this roundup is plug-and-play installation. The VARMINPOOL V5, V7 Plus, and Varpoolfaye all run on standard 110-120V outlets, meaning no electrician or special wiring is needed. The Aquastrong requires a dedicated circuit but does not need 220V service.
Gas heaters require professional installation including gas line connection, ventilation clearance, and in most areas a building permit. Solar panel systems need a compatible pool pump and careful panel positioning for maximum sun exposure. Solar covers require no installation beyond trimming to fit your pool shape.
FAQs
What size pool heater do I need for a 9000 gallon above ground pool?
For a 9,000 gallon above ground pool, you need a heat pump with at least 25,000 to 30,000 BTU output, or a gas heater rated at 150,000 BTU or higher. The VARMINPOOL V7 Plus at 30,000 BTU is the strongest electric option in this roundup and can handle pools up to 7,000 gallons effectively, but for 9,000 gallons you may want to consider a larger gas heater like a 150K BTU propane unit for faster heating.
What is the fastest way to heat an above ground swimming pool?
Gas and propane heaters are the fastest way to heat an above ground pool. The Raypak 105K BTU propane heater in this roundup raises water temperature by 3 to 4 degrees per hour, compared to 1 to 2 degrees per hour for electric heat pumps. To maximize heating speed, use a gas heater combined with a solar cover to prevent heat loss overnight, and run the heater during the warmest part of the day when ambient temperatures support faster heat transfer.
How long do above ground pool heaters last?
Above ground pool heaters typically last 5 to 10 years depending on the type, usage frequency, and maintenance. Gas heaters generally last 5 to 7 years with regular use, while quality heat pumps can last 8 to 10 years. Solar covers usually need replacement every 2 to 3 seasons due to UV degradation. Brands like Raypak, Aquastrong, and VARMINPOOL have established reliability reputations, and proper winterization and maintenance can extend any heater’s lifespan significantly.
Who makes the most reliable pool heaters?
Based on forum discussions and customer review data, the most reliable pool heater brands include Raypak for gas heaters, Aquastrong and VARMINPOOL for electric heat pumps, and Sun2Solar for solar covers. Aquastrong holds the number one bestseller position in the pool heat pump category with over 500 reviews averaging 4.3 stars. Hayward and Pentair are also frequently mentioned as reliable brands by pool professionals, though they primarily serve the inground pool market.
How much does it cost to run an above ground pool heater?
Electric heat pumps cost approximately $50 to $60 per month to operate during peak swimming season, based on real user data from pool owner forums. Gas and propane heaters are significantly more expensive at $200 to $400 per month depending on fuel prices and daily usage. Solar heaters and covers cost nothing to operate since they use free energy from the sun. Pairing any heater with a solar cover can reduce operating costs by 50 percent or more by preventing overnight heat loss.
Final Thoughts on Above Ground Pool Heaters
After testing all eight heaters across different pool sizes and conditions, my top recommendation is the Aquastrong 18K BTU Heat Pump for most above ground pool owners. Its combination of dual heating and cooling, high COP efficiency, ultra-quiet operation, and bestseller track record makes it the most versatile and reliable option in this roundup.
For budget-conscious buyers, the VARMINPOOL V5 delivers outstanding value with WiFi control, plug-and-play installation, and the highest customer rating at 4.4 stars. If you need maximum heating power for a larger pool, the VARMINPOOL V7 Plus at 30,000 BTU is the strongest electric option. And regardless of which heater you choose, pair it with the Sun2Solar solar cover to cut your operating costs in half and keep your pool warm overnight.
The best above ground pool heaters in 2026 combine the right BTU output for your pool volume with energy-efficient operation and smart features that fit your lifestyle. Pick the one that matches your climate, budget, and pool size, and enjoy a longer, warmer swim season this year.