Short answer: for most above ground pool owners the best pool heaters for above ground pools are a heat pump sized to your gallons, paired with a solar cover. A 110V or 120V plug-in model avoids electrical work entirely and suits small and mid-size pools, a 220V inverter unit fits pools past 8,000 gallons, and solar only makes sense in a sunny yard with no shade. A gas heater heats fastest but needs a gas line and a licensed fitter.
We spent weeks reading spec sheets, owner reviews and forum threads on this topic, then sorted the field by the three things that actually decide the outcome: how many gallons your pool holds, what power you have available at the pad, and how many hours of sun your yard gets. Those three answers remove almost every wrong purchase before you spend anything.
That matters more than usual for above ground pools. Above ground water sits in a thinner wall with no deep dug-in heat sink, so it warms fast in the sun and cools fast at night. Owners on pool forums consistently report the same thing: the heater is the easy part, the cover is what decides whether the season runs three months or six.
Table of Contents
Top 3 Picks for Above Ground Pool Heating (October 2026)
AQUASTRONG HEX016 Heat Pump
- COP 5.5 efficiency
- Heats and cools on one unit
- 38 dB quiet operation
- Adapters for 1.25 and 1.5 inch hose
Varpoolfaye 30,000 BTU Heat Pump
- 30K BTU at COP 5.8
- Pools up to 8000 gallons
- 120V plug-in
- Heats and cools
ECOPOOLTECH 5,000 Gallon Heat Pump
- COP 5.62 efficiency
- Pools to 5000 gallons
- Quick-connect hookup no tools
- Pure titanium heat exchanger
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Best overall: AQUASTRONG HEX016. Why it’s great: COP 5.5 efficiency, 38 dB operation, a genuine heat and cool unit, dual-mode thermostat accuracy within plus or minus 2 degrees, and both 1.25 inch and 1.5 inch hose adapters in the box. Best for: nearly any above ground pool up to about 12 by 14 feet, with a simple two-hose hookup.
Best value for medium pools: Varpoolfaye 30,000 BTU. Why it’s great: 30,000 BTU output at COP 5.8 from a standard 120V outlet, with a titanium heat exchanger and heating and cooling modes. Best for: 5,000 to 8,000 gallon pools that need faster heat-up than a small plug-in unit gives.
Most compact pick for small pools: ECOPOOLTECH 5,000 gallon. Why it’s great: COP 5.62, a pure titanium heat exchanger and a tool-free quick-connect hookup. Best for: pools up to 5,000 gallons, including 15 foot round and 9 by 18 foot rectangular setups.
Best solar: Goplus 2.5 by 10 foot collector. Why it’s great: 25 square feet of collector area that adds up to 10.8 degrees with no electricity or gas at all. Best for: sunny yards with small pools that only need a few extra degrees on a swim afternoon.
Best gas for fast heat-up: Raypak PR106AENC. Why it’s great: 105,000 BTU of natural gas heat from a single-piece extruded copper fin-tube exchanger. Best for: cold climates and opening-day heat-ups, if you already have gas capacity at the pool.
All 12 Above Ground Pool Heaters Compared Side by Side
| Product | Key Features | |
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AQUASTRONG HEX016 Heat Pump
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Varpoolfaye 30,000 BTU Heat Pump
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ECOPOOLTECH 5,000 Gallon Heat Pump
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 TURBRO Beluga 50,000 BTU Inverter
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 Raypak PR106AENC 105,000 BTU Gas
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 Varpoolfaye 40,000 BTU 220V Heat Pump
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 WARMBLU 5,500 Gallon 110V
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Check Latest Price |
 MICOE 18,000 BTU Heat Pump
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 Varpoolfaye 3,500 Gallon 110V
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 TURBRO Manatee M18 18,000 BTU
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 Bestway Solar Heating Pad
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 Goplus 2.5 by 10 ft Solar Collector
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1. AQUASTRONG HEX016 – the most complete all-round heater for above ground pools
Swimming Pool Heater for Above Ground and Inground Pool 12’*14’*48″
- COP 5.5
- Heats 41-104F, cools 41-83F
- 38 dB
- 1.25 and 1.5 inch adapters
Pros
- Heats and cools on one dual-mode thermostat
- COP 5.5 efficiency rating
- Runs quietly at 38 dB
- Automatic defrost clears ice on its own
- Adapters and conversion kit included for a fast install
Cons
- Output scales with ambient air temperature
- Sizing is tied to one specific pool dimension set
- Cooling band stops at 83F
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This is the model we kept coming back to while comparing the group. It is a 120V heat pump rated for a 12 by 14 foot above ground pool at 48 inch depth, which covers a very large share of what people actually own. Owners describe a unit that heats and cools in the same cabinet, holds temperature to within plus or minus 2 degrees, and disappears acoustically next to a filter pump at 38 dB.
The 5.5 COP rating is the number that matters most over a season. A heat pump does not create heat, it moves it, so that is roughly 5.5 watts of heat moved into the water for every watt of electricity consumed. That figure falls as the air cools, which is why we treat it as a ceiling rather than a guarantee.
The install story is unusually good for an above ground pool. The box includes 1.25 inch hose adapters and a 1.5 inch conversion kit, so most soft-sided pools connect without a trip to the hardware store. Assembly is under ten minutes according to the manufacturer, and the whole cabinet is 21 by 19.5 by 19.5 inches, small enough to tuck beside a filter.
Two things to weigh before buying. First, output is tied to ambient air temperature, so a cold snap means a cold slow week. Second, the sizing is specific to those pool dimensions, so measure your pool rather than eyeballing it. The 74 percent five-star share across 534 ratings is the strongest review base in this group, and the 11 percent one-star block is mostly people who bought it for the wrong pool size.
Who the AQUASTRONG HEX016 suits
It suits small to mid-size above ground pool owners who want one appliance to do heating and cooling across the shoulder season. The cooling mode is genuinely useful in August evenings when the water is warmer than the air.
It also suits anyone who wants heating without hiring anyone. A standard 120V circuit and two hose fittings are the whole installation, which is the single most common reason small-pool owners pick a heat pump over gas.
Who should buy something else
Skip it if your pool runs past about 8,000 gallons, because a larger compressor will pull heat down faster than this cabinet can. Owners of big rectangular pools consistently report multi-day climbs rather than overnight jumps.
Skip it too if you expect to heat through genuinely cold weather.
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2. Varpoolfaye 30,000 BTU – the fastest heat-up from a standard outlet
Varpoolfaye 30,000 BTU Electric Above Ground Pool Heater for 8,000 Gallon
- 30,000 BTU
- COP 5.8
- Pools to 8,000 gal
- 120V plug-in
- Titanium exchanger
Pros
- COP 5.8 keeps running cost far below gas
- Heats and cools from one 120V plug
- Quiet enough to vanish under a filter pump
- App control for temperature and schedules
- Titanium exchanger handles saltwater pools
Cons
- Factory water adapters can leak until torqued
- App is thinner than the physical control panel
- Much slower than a gas heater on a cold start
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If your pool sits between 5,000 and 8,000 gallons and you want heat-up speed without an electrician, this is the one. The 30,000 BTU compressor output with a COP of 5.8 is a strong pairing, and it runs on 120V with a 126 inch power cord, so most owners plug it straight into an existing outdoor circuit.
Reviewers describe big jumps in water temperature over a day or two of runtime, and 80 percent of its 150 ratings sit at five stars. At 52 dB it is a touch louder than the AQUASTRONG but still below normal conversation at the poolside.
The titanium heat exchanger works for both fresh and saltwater pools, which is worth noting if you plan to convert later. It heats from 46 to 104 degrees and cools from 46 to 82 degrees, giving you useful shoulder-season cooling rather than heat-only operation.
Real drawbacks exist. Some units arrive with loose factory-installed water adapters that leak until they are properly torqued, so budget ten minutes with a wrench before first fill. Condensation dripping from the base during heat exchange and defrost looks alarming but is normal, and it trips up more than one new owner.
When this heat pump earns its place
It earns its place on pools where a 13,000 BTU unit would feel like an uphill fight. Owners of 16, 18 and 21 foot pools report the difference between a usable weekend and a usable season.
It also suits saltwater setups, because a titanium exchanger resists chlorinated salt water far better than the copper alternatives used in budget heaters.
Where the limitations show
The limitation is cold-weather speed. Owners comparing it against gas describe it as patient rather than fast, and that gap widens sharply when ambient air falls into the 50s.
The second limitation is the app. Several reviewers say the physical control panel handles more settings than the app does, so treat the phone as a convenience rather than the primary interface.
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3. ECOPOOLTECH 5,000 gallon – the cleanest install for small pools
ECOPOOLTECH Swimming Pool Heater, Pool Heat Pump, Smart WiFi Control, Fits 8/11/15 Foot Pools, Electric Heat Pump Pool Heaters, Pool Warmer for Above groung and inground Pools (7000 Gallons)
- COP 5.62
- Pools to 5,000 gal
- Quick-connect hookup
- Pure titanium exchanger
Pros
- COP 5.62 efficiency
- Tool-free quick-connect hookup
- Titanium exchanger is saltwater safe
- Built-in flow sensor syncs to pump timing
- 3-year warranty outlasts most rivals
Cons
- Ceiling of 5000 gallons
- Output falls as ambient air cools
- App setup adds another device to maintain
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The COP of 5.62 is one of the higher efficiency figures among the plug-in units we reviewed. It handles above ground pools up to 5,000 gallons, which the manufacturer maps to a 15 foot round pool or a 9 by 18 foot rectangular one.
The install is the standout feature for this audience. Owners report a quick-connect hookup that needs no tools and no plumber, plus a built-in water flow sensor that syncs heating to the pump schedule rather than running against a dry system.
Operating range runs from 40 degrees ambient to 105 degrees, with pool water handled up to 100 degrees. That leaves headroom for most temperate climates without asking the compressor to work at its limit.
The pure titanium heat exchanger is the safer long-term choice if you ever add salt, and the 3-year warranty is longer than most rivals in this price band. Sixty-eight percent of its 286 ratings are five stars, with an 11 percent one-star group focused on the app rather than the heating.
Why small pool owners pick this one
Because it removes every reason to hire anyone. Hose fittings, a 120V outlet and about ten minutes cover the whole install, which is exactly what people running 8, 10 and 12 foot pools tell us they want.
The flow sensor is the detail most buyers overlook and most appreciate, because it stops the common failure where a heat pump runs with no water moving through it.
Where it falls short
The 5,000 gallon ceiling is real. Beyond that, the compressor cycles rather than catching up, and owners end up running it continuously, which erases the efficiency advantage.
The app is another thing to maintain, set up and keep updated. For a heater that changes twice a season, the physical controls alone would serve most owners fine.
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4. TURBRO Beluga 50,000 BTU – capacity and COP for very large pools
TURBRO 50,000 BTU Inverter Pool Heater, Up to 15,000 Gallons, 220-240 V
- Up to 75,000 BTU
- COP up to 16.2
- Pools to 21,100 gal
- 220-240V hardwired
Pros
- Inverter compressor modulates output for steadier water
- COP up to 16.2 cuts energy cost sharply
- Handles pools and spas to 21100 gallons
- Titanium exchanger safe for saltwater
- Full sensor suite with error codes and auto-shutdown
Cons
- Needs a certified electrician for 220-240V
- Best efficiency above 60F ambient
- Hoses valves filters and pumps not included
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The Beluga series is the outlier in this group for one reason: it uses a full DC inverter compressor rather than a conventional fixed-speed one, which is the single biggest engineering jump in this roundup. Everything else about the design follows from that choice.
Heat capacity reaches 75,000 BTU at a quoted COP of up to 16.2, a far higher figure than the 5.5 COP plug-in units, and the inverter compressor modulates rather than cycling.
Capacity is the other headline. It covers pools and spas up to 21,100 gallons, equivalent to a 28.3 foot round pool or a 20 by 40 foot oval.
The inverter compressor modulates heating power rather than cycling full blast, which is what holds water temperature steady instead of overshooting. A built-in sensor suite watches inlet and outlet water temperature, ambient temperature, current, voltage, pressure and flow, and shuts down on a fault with an error code rather than running damaged.
Be realistic about the install. It needs a 220-240V hardwired connection installed by a certified electrician, and it is the heaviest model here at 146.7 pounds across a 25.9 by 15.7 by 38.5 inch cabinet. Hoses, valves, filters, pumps and chlorinators are all separate purchases.
Where the inverter design pays off
It pays off on long holds. Once the pool reaches temperature, the compressor throttles back instead of switching off, so the heater holds a setpoint for hours at much lower energy draw. Two programmable timer periods on the panel or app let you schedule around swimming hours.
It also suits saltwater and chemical-heavy water, since the titanium exchanger is rated corrosive to both.
Where buyers get caught out
Efficiency falls below its best level once ambient air drops under 60 degrees, which the manufacturer states plainly. In genuinely cold weather this unit is efficient, not powerful.
Two more honest caveats: it is not recommended for inflatable pools because of low water pressure, and with only 34 ratings behind it, this is the thinnest review base in the group. The spec sheet is excellent; the long-term durability record is still building.
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5. Raypak PR106AENC – the gas heater for fast opening-day heat
Raypak PR106AENC 105,000 BTU Natural Gas Pool Heater for Above Ground Pool and Spa Elevations 0–4,999 ft (014779)
- 105,000 BTU natural gas
- All-copper fin-tube exchanger
- 0-4,999 ft elevation
Pros
- Adds heat far faster than any heat pump in this group
- Runs so quietly owners barely notice it
- Single-piece copper exchanger resists corrosion
- Polymer headers help prevent rust staining
- Draft-free design shrugs off wind and rain
Cons
- Internal rust and leaks reported inside the first year
- Igniter failures reported soon after purchase
- Front panel damage on delivery happens
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Nothing heats water faster than 105,000 BTU of burning gas. When you need the pool swimmable the same afternoon, a gas burner is doing something no air-source heat pump in this group can match, because it does not depend on ambient air temperature at all.
The heat exchanger is a single extruded copper piece with all-copper fin tubing, and the polymer headers are designed to avoid rust staining on pool and spa surfaces. Rated for elevations from 0 to 4,999 feet, so it covers most of the country.
Draft-free combustion is the underrated feature. There is no fan to counter downdrafts and updrafts, so the unit keeps working in wind, rain, sleet and snow, and owners note it shrugs off leaves and airborne debris without shutting down.
The negative side is heavier than the performance praise. Some owners report internal rust and leaking within the first year of light use, igniter failures shortly after purchase, and damage to the front panel on arrival. Support experiences vary widely. Plumbing connections sit close together, so one side needs extra straight pipe.
Who a gas heater genuinely suits
It suits cold-climate owners who want reliable heat when the thermometer drops below what any heat pump can work with. It also suits people whose yard is in partial shade all day, where owners report solar is effectively useless and gas is the only consistent answer.
If you already have a gas line run to the pool, the economics shift a long way in this heater’s favour compared with installing one from scratch.
Where gas falls short
It falls short on running cost and on installation. A line set, meter capacity and a licensed fitter are all required, and heat pumps simply cost far less per hour of heat once they are running.
It also falls short on feedback volume. Sixty-seven ratings is a thin base for a durable-goods purchase, and the one-star share of 19 percent points to a meaningful early-failure group worth researching before you commit.
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6. Varpoolfaye 40,000 BTU – a 220V heat pump for pools up to 12,000 gallons
Varpoolfaye 40000 BTU Pool Heater for Above Ground and Inground Pools 220v
- 40,000 BTU
- COP 6.2
- Pools to 12,000 gal
- 220V
- 53 dB
Pros
- COP 6.2 is strong efficiency for a 220V model
- Wide heating and cooling band in one appliance
- Quiet at 53 dB
- Titanium exchanger works with saltwater
- App control for temperature and scheduling
Cons
- 220V supply needs the right breaker and circuit
- Efficiency drops as outdoor air cools
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This is the middle rung between the plug-in units and the commercial-size inverter. Forty thousand BTU of heating output at a COP of 6.2 covers above ground or inground pools up to 12,000 gallons across pool sizes from 14 to 28 feet.
The COP of 6.2 at 220V is the interesting part. Higher voltage supplies let the compressor draw more current, which is how you get real heat output without a much larger cabinet. Seventy-eight percent of its 149 ratings sit at five stars.
Heating runs from 59 to 104 degrees and cooling from 45 to 86 degrees, so it can actually pull a pool down on a hot afternoon rather than merely holding it. At 53 dB it stays in the range where conversation is not interrupted.
The constraint is the supply itself. A 220V circuit needs a properly sized breaker, and if your panel does not have a spare slot, that is an electrician visit before the heater ever arrives. Condensation dripping from the base during defrost is normal, not a leak.
Why 12,000-gallon owners pick this
Because it closes the gap between a slow small unit and a gas burner without leaving the electric side. The titanium exchanger also means a saltwater conversion stays a simple chemistry change rather than a heater replacement.
App-based scheduling works well here, letting you start heating before you get home rather than burning afternoon hours.
Where it will disappoint
It will disappoint anyone expecting gas-speed warm-up. Owners describe heat pumps generally as a slow steady climb rather than an event, and this is squarely in that category.
The second disappointment is efficiency in autumn. As ambient air drops, so does the COP, and the running cost per degree of heat rises even though the BTU figure on the box does not change.
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7. WARMBLU 5,500 gallon – a compact 110V unit with a titanium exchanger
WARMBLU 5,500 Gallons Above Ground Pool Heater 110V
- Pools to 5,500 gal
- 110V operation
- Pure titanium exchanger
- COP 4.1
Pros
- Runs on a standard 110V outlet
- Titanium exchanger resists corrosion
- Quiet under 50 dB
- App plus touch panel control
- Compact body suits tight setups
Cons
- COP 4.1 trails several 110V rivals
- Only a 12-month warranty
- Output drops in cold ambient air
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This is the answer when yard space is tight and the circuit is 110V. The cabinet measures 17 by 16 by 17.8 inches and weighs 73.8 pounds, which makes it the easiest of the group to move around an above ground pool setup.
It handles pools up to 5,500 gallons with a pure titanium heat exchanger on the SpringBreath 1.0 system, and water and electrical components are fully separated for safety. An inverter chip with a dynamic algorithm handles the control side.
Owners highlight three things consistently: the 110V convenience, quietness under 50 dB comparable to a refrigerator hum, and a clean installation. Seventy-three percent of its 135 ratings are five stars.
Now the honest part. The COP of 4.1 is the lowest efficiency figure among the 110V heat pumps we compared, which means more electricity per degree of heat than the AQUASTRONG or ECOPOOLTECH. A 12-month warranty is also the only one-year term stated anywhere in this group.
Where the compact footprint helps
It helps on small decks and against a vinyl wall where a 35 inch wide unit simply will not fit. The touch panel plus app combination also means you can check water temperature without walking over.
For a first heat pump purchase on a modest pool, the simplicity of a single 110V outlet and two hoses is worth a great deal.
Where the lower COP costs you
It costs you in electricity over a full season. A COP of 4.1 means roughly 4.1 watts of heat for every watt of power in good conditions, so the same pool takes noticeably more energy than a 5.5 COP unit reaches.
The 12-month warranty is the other concern. On a durable-goods purchase expected to last many seasons, one year of cover is thin compared with the three years offered by several rivals here.
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8. MICOE 18,000 BTU – the widest ambient operating range
MICOE 18000 BTU Pool Heater for Above Ground Pool Up to 5500 Gallons
- 18,000 BTU
- Pools to 5,500 gal
- 32F to 109F ambient
- 50 dB(A)
Pros
- Owners report pools reaching the upper 80s in under two days
- Quiet at 50 dB(A)
- App is quick to set up
- Support answers fast and sends parts
- Includes a 15-minute DIY install kit
Cons
- Wiring diagrams are confusing
- Flimsy plastic cover plate over the terminals
- A share of units arrived dead with a blank screen
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The distinguishing spec is the operating range. This unit runs from 32 degrees ambient up to 109 degrees and handles pool water to 104 degrees, which makes it the most tolerant of shoulder and early-spring conditions in this roundup.
Owners frequently describe dramatic results, with pools reaching the upper 80s in under two days. The manufacturer claims air-source technology heats 50 percent faster than standard electric heaters and cuts heating cost by 40 percent.
Build quality is mixed at the details. The titanium tube heat exchanger carries an IPX4 weatherproof rating, but owners single out the flimsy plastic cover plate over the electrical connections and say the wired remote is not durable enough for daily handling, recommending the app instead.
Support is a genuine strength. Owners report quick answers and parts shipped promptly, including a grounding modification piece. The 15-minute DIY install kit helps offset confusing wiring documentation, and the 2-year warranty sits mid-pack.
Who benefits from the wide operating range
Northeast and upper Midwest owners who want usable water earlier in the season and later in autumn. The lower ambient floor means the compressor keeps working when other units are already struggling.
It also suits anyone who plans to keep the pool going later into shoulder season without wanting a second gas appliance.
What to watch for
Quality control. Fifteen percent of its 69 ratings sit at one star, and a recurring theme is units arriving dead with a blank screen that needed replacing. Check the unit on arrival rather than assuming.
The documentation is the other weak spot. Reviewers find the wiring diagrams confusing, particularly on higher-voltage variants, so budget more time on electrical connections than the fifteen-minute claim suggests.
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9. Varpoolfaye 3,500 gallon – the right call for the smallest pools
Varpoolfaye 3500 Gallon Electric Pool Heat Pump for Above Ground Pool 110V
- 13,000 BTU
- COP 4.3
- Pools to 3,500 gal
- 110V plug-in
Pros
- Standard 110V outlet with no wiring work
- Light at 65.9 pounds and easy to move
- Heats and cools for long season use
- Universal connectors and a 118 inch cord
- App control for temperature and modes
Cons
- Lowest rating in the group at 3.7 stars with a 22 percent one-star share
- COP 4.3 means longer heating times
- Needs a pump moving about 700 GPH
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For a 600 to 1,000 gallon kiddie pool or a 10 foot round above ground pool, a big heater is wasted money and wasted floor space. This one covers pools up to 3,500 gallons with 13,000 BTU of heat and cooling output.
Owners of very small pools tell us the whole decision is simplicity. It runs on 110V, weighs 65.9 pounds so you can reposition it seasonally, and ships with DN32-38 mm universal connectors and a 118 inch cord.
We are going to be direct about the ratings here. At 3.7 stars with a 22 percent one-star share, this is among the weaker-reviewed products here, and that is worth understanding before you buy. Feedback is genuinely split: people like the plug-in convenience and the compact size, while a large group report underperformance on heating.
The COP of 4.3 also means longer heating times, and the unit needs a pump pushing roughly 700 GPH to circulate water properly, so a smaller filter pump will hurt heating performance.
When a small heater is the right buy
When your pool is genuinely small. Owners running sub-1,000-gallon setups say the pool is small enough that a simple setup or short heat pump runtime covers everything they need, and a larger cabinet would just be taking up space.
The 110V plug-in also means no electrician, which is the deciding factor for most people at this pool size.
When to spend more instead
If your pool is anywhere near 3,000 gallons and you want heat in a hurry, step up to the ECOPOOLTECH or AQUASTRONG. The higher compressor output and better COP there will shorten a multi-day climb considerably.
Also step up if you want cooling in hot weather, because this model bottoms out at 46 degrees and tops out at 104 degrees, a narrower band than the units above it.
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10. TURBRO Manatee M18 – built for inflatable pools on 120V
TURBRO 18,000 BTU Swimming Pool Heat Pump, up to 6,000 Gallons, 110-120V
- 18,000 BTU
- COP 5.5
- 110-120V GFCI plug
- Pools to 6,000 gal
Pros
- Plugs into a standard outlet with no hardwiring
- COP 5.5 trims energy use versus gas
- Titanium exchanger tolerates saltwater
- Works with inflatable pools which most models exclude
- Clamps connectors and drain adapter included
Cons
- Weakest average rating here at 3.5 stars
- Reaching target temperature can take several days
- Water hoses and pool filters not included
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The headline feature is compatibility. This unit is listed for inflatable pools, frame pools, small spas and inground pools up to 6,000 gallons, either round pools to 16 feet or rectangular to 12 by 20 feet. Several competing heat pumps carry the same caveat, and are not recommended for inflatable setups because of water pressure concerns.
Specification-wise it looks right for the job. Eighteen thousand BTU output at a COP of 5.5, 110-120V operation with a GFCI plug, heating from 59 to 104 degrees and cooling from 46 to 82 degrees.
The warranty is among the best in the group: 2 years full machine and 5 years on the compressor. The kit includes hose clamps, connectors and a drain outlet adapter, and the IPX4 rating plus auto-defrost and safety sensors are all welcome outdoors.
The reality is more mixed. At 3.5 stars this is the lowest-rated product we reviewed, with only 36 percent of ratings at five stars, a broad block at four stars, and an 18 percent one-star share. That pattern usually means inconsistent real-world heating rather than a broken product.
Why inflatable pool owners should look here
Because it is one of the few models in this category that explicitly supports inflatable pools, which are otherwise hard to heat without damaging the liner. The GFCI plug also removes any wiring conversation.
The included clamps and connectors make a same-day setup realistic if your pump is already plumbed nearby.
Where the rating spread shows up
In heating consistency. Owners report reaching target water temperature can take several days, and that output falls off in cool weather without a pool cover doing its job.
Note also that water hoses and pool filters are not included, so budget for those separately. Given the rating spread, we would buy this only for an inflatable or frame pool, not for a permanent installation where we have alternatives.
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11. Bestway solar heating pad – adding a few degrees for free
Bestway | Solar-Powered Pool Heating Pad
- Solar powered
- 5-9F rise
- Two hose outlets
- 1.25 and 1.5 inch adapters
Pros
- Free solar energy with no electricity or gas
- Two hose hookup to an existing filter pump
- Weather-resistant construction
- Pairs well with a solar pool cover
- Adds several degrees on a sunny afternoon
Cons
- Some pads arrive with pinhole leaks
- Gaskets are too few for chaining mats
- Gain depends entirely on sun
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If your goal is the cheapest way to heat an above ground pool, this is the honest answer alongside a cover. The Bestway pad uses no electricity and no gas, circulating pool water through a solar surface and back, with two hose outlets for closed-loop circulation.
Manufacturer-claimed gain is 3 to 5 degrees Celsius, which is 5 to 9 degrees Fahrenheit, depending on weather. Owners running it with a solar pool cover report noticeably warmer water, which is the pairing that makes solar worth doing at all.
Compatibility details are specified clearly, which saves guesswork. It works with cartridge filter pumps of 2,500 gallons per hour and above, and sand filter pumps of 2,200 gallons per hour and above. Adapters for both 1.25 inch and 1.5 inch hose fittings come in the box.
The complaints are consistent and fixable. Some pads arrive with pinholes that leak, and the included gaskets are insufficient for chaining several mats together. Owners also report the pad can slow filter flow if the pump is not properly sized, and the heat gain is entirely dependent on sun.
When solar alone is enough
Solar alone is enough for small pools in sunny climates where you only want comfortable water on a swim afternoon rather than temperature you control precisely. Owners of small sub-1,000-gallon pools say exactly this is all they need.
It is also the only category here with no ongoing energy cost, which changes the maths entirely over several seasons.
When solar will not deliver
It will not deliver on an overcast day, and shaded-yard owners report solar is essentially useless for them. Expect meaningful gain only in direct sun.
Do not expect overnight heating. Without a cover, heat leaves overnight and the pad starts from scratch each morning, which is why the cover pairing is not optional in our view.
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12. Goplus 2.5 by 10 foot collector – the larger solar panel option
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)
- 2.5 by 10 ft collector
- Pools to 3,408 gal
- Up to 10.8F rise
Pros
- No electricity or gas needed at all
- Owners report strong gains in full sun
- Runs at no energy cost after install
- Roll-up design moves with the seasons
- Illustrated setup instructions
Cons
- Fitting leaks are the most common complaint
- Mismatched panel lengths bow when linked
- Full filter flow forces you to add a bypass
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This configuration gives you two 2.5 foot wide collector panels running to a total length of 10 feet, which is a bigger collector footprint than a single small pad offers. Stated capacity is pools up to 3,408 gallons with a temperature rise of up to 10.8 degrees.
Owners report large gains in full sun, with pools rising by around 20 degrees on good days. The roll-up design is genuinely useful, since you can move the collector to follow the sun through the season rather than fixing it in one spot.
The material is PE rated from minus 20 degrees Celsius to 90 degrees Celsius, which covers extreme outdoor conditions. End caps, hose clamps, connector hoses, elbow connectors and hose adapters are all included, and the setup instructions use clear illustrations.
The recurring complaint is fittings. Leaks at connections are the most frequently reported issue, the included clamps are described as flimsy, and some owners replaced rubber fittings with PVC and cement. Several also found panel lengths within a unit did not match, causing them to bow when linked.
Who should buy the larger collector
Anyone with a sunny yard who wants more solar surface area than a small mat offers, and who is comfortable with a hands-on plumbing job. A bypass loop, which several reviewers added as a fix, is the key to controlling flow and stopping leaks.
The 0.75 HP pump minimum matters. If your filter pump is smaller, you will need to add one, and the pump is not included.
What to fix before you start
Budget for stainless steel clamps. Owners who swapped the included hardware report that this single change removes most of the fitting complaints, and it matches advice repeated across pool forums about budget solar hardware.
Also buy mounting brackets separately, since none are included, and add a bypass valve rather than pushing full filter flow through the panels. Skip this one if your yard is shaded or if you dislike plumbing work.
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How to choose a pool heater for an above ground pool
Step 1: work out your pool volume in gallons
For a round pool, gallons equal pi multiplied by the radius squared, multiplied by average depth, multiplied by 7.48. A 15 foot round pool at 4 feet average depth works out to roughly 5,300 gallons. A 12 foot round pool at 3.5 feet is around 2,900 gallons.
For a rectangular pool, multiply length by width by average depth by 7.48. A 16 by 32 foot pool at 4 feet average depth is about 15,300 gallons. Measure average depth rather than using the wall height, because most above ground pools have a sloped bottom.
Step 2: match BTU output and COP to your pool size
A workable rule for above ground pools is roughly 100,000 BTU of heat pump output per 10,000 gallons, but with a caveat: that is a comfort figure, not an opening-day figure. Above ground water gains and loses heat faster than an in-ground pool, so most owners run a heater to hold temperature rather than to recover from cold.
Match the product ceiling to your gallons. The AQUASTRONG HEX016 targets a 12 by 14 foot pool. The Varpoolfaye 30,000 BTU covers up to 8,000 gallons. The Varpoolfaye 40,000 BTU and TURBRO Beluga cover up to 12,000 and 21,100 gallons respectively. The Goplus solar collector is stated for pools up to 3,408 gallons.
Read COP as the efficiency multiplier and expect the real figure to be lower. A unit rated at COP 5.5 will deliver closer to 4 or less on a damp 55 degree morning. Anything claiming COP 16.2, like the TURBRO Beluga, is quoting a best-case laboratory number rather than a seasonal average.
Step 3: check your power or gas supply before you buy
This is the step that decides most above ground pool purchases, and it is the one most often skipped. A 120V heat pump needs an outdoor GFCI outlet, which many above ground setups already have near the filter pump. The AQUASTRONG, ECOPOOLTECH, Varpoolfaye 30,000 BTU, WARMBLU, MICOE, Varpoolfaye 3,500 gallon and TURBRO Manatee M18 all run on 110 or 120V.
A 220V unit needs a properly sized breaker and a panel with spare capacity. The Varpoolfaye 40,000 BTU and TURBRO Beluga fall into this group, and the Beluga explicitly calls for a certified electrician. Factor that labour into the decision, because it is often larger than the difference between two heaters.
A gas heater needs more than a purchase. It needs a line set sized for the BTU load, adequate meter capacity, and a licensed fitter. If none of that exists at the poolside already, the installation cost can exceed what you saved on the appliance.
Solar needs no new supply at all, which makes it the only option with no permitting, no electrician and no fitter. It needs a pump of sufficient capacity, which is the hidden requirement people forget.
Gas vs heat pump vs solar: which one fits your yard
Choose gas when speed is the priority, your climate is cold, or your yard is shaded. Choose a heat pump when running cost matters most, your pool is under 12,000 gallons and you have 120V or 220V available. Choose solar when the yard is sunny, the pool is small, and you want zero energy cost.
The hybrid pattern comes up constantly on owner forums and it is worth stealing. Cold-climate owners report firing the gas heater at opening to reach roughly 77 degrees, then letting solar or a heat pump hold that temperature for the rest of the season. You get the fast recovery once and the cheap running cost every day after.
On climate, the honest ranking is that gas performs identically everywhere, heat pumps perform well in mild and shoulder conditions and lose ground in cold damp air, and solar collapses to near zero without direct sun. Shaded-yard owners consistently report that solar is useless for them and gas is the only reliable answer.
Why a pool cover is not optional
Because most heat leaving an above ground pool leaves through the surface, and a cover is the cheapest way to stop it. Owners running solar plus a solar cover report noticeably better overnight retention and describe it as cutting heating costs significantly.
A solar blanket does two jobs at once. It reduces evaporation, which is the single largest heat loss in an open pool, and it adds heat from the sun for free during the day. Together they turn a modest daytime gain into something you keep overnight.
If your budget only stretches to one accessory this season, spend it on a cover rather than on a bigger heater. Heat pumps in this list all note that output falls in cool weather, which is exactly when a cover matters most.
Frequently Asked Questions
What is the cheapest way to heat an above-ground swimming pool?
Solar plus a solar cover is the cheapest route, because the energy is free and the cover stops most of what you collect from escaping overnight. On a small sunny pool, a Bestway solar pad or a Goplus collector can add 5 to 12 degrees on a sunny afternoon for no running cost. In shaded yards solar does almost nothing, and the cheapest effective option becomes a 120V heat pump on a timer.
What is the best heat pump for an above-ground pool?
For most above ground pools, the AQUASTRONG HEX016 is the best all-round heat pump, pairing a COP of 5.5 with heating and cooling modes, 38 dB operation and included 1.25 inch and 1.5 inch hose adapters. For pools past 8,000 gallons, step up to the Varpoolfaye 30,000 BTU or 40,000 BTU models, which pull water down faster from a standard circuit.
Is a heat pump better than a gas heater for a pool?
For running cost, yes by a wide margin: a heat pump moves roughly four to six watts of heat for every watt of electricity, while a gas burner converts fuel at a far lower rate. For speed and cold-weather reliability, gas wins decisively, since it heats 1 to 3 degrees per hour in any weather and does not depend on ambient air temperature. Many owners run gas for opening day and a heat pump for the rest of the season.
How many BTU do I need to heat a 10,000 gallon pool?
Above ground pools need less than you would think for holding temperature, because the goal is maintaining a setpoint rather than recovering from cold. A rule of thumb is about 100,000 BTU of heat pump output per 10,000 gallons, which points to a 30,000 to 40,000 BTU unit. To size precisely, measure your pool volume, then check the manufacturer gallons ceiling before choosing.
What are the downsides of using a heat pump pool heater?
Heat pumps are slow. They typically need one to three days of runtime to raise temperature meaningfully, compared with a few hours for gas. Their output and COP both fall as ambient air temperature drops, so performance in cold damp weather disappoints many owners. They also need a dedicated circuit, a working pump supplying adequate flow, and they do nothing for a shaded yard that solar also cannot reach.
Final Verdict for Above Ground Pool Heaters in 2026
The AQUASTRONG HEX016 is our pick for the best pool heaters for above ground pools overall. It hits the combination that matters most: a high COP of 5.5, genuine heating and cooling, the quietest operation in the group at 38 dB, and included adapters for both common above ground hose sizes, all on a standard outlet with a three-year warranty and the strongest review base we saw.
If your pool runs past 8,000 gallons, the Varpoolfaye 30,000 BTU or 40,000 BTU pulls water down faster. If your pool is very small, the ECOPOOLTECH gives you a COP of 5.62 in a tool-free install. If you need dependable heat in freezing weather, the Raypak PR106AENC gas heater is the practical choice. If your yard is sunny and quiet, the Goplus collector gives you free heat with no supply work at all.
Before any of them, buy the cover. It is the cheapest efficiency gain available to an above ground pool owner, and it is what turns a three-month season into five or six. Measure your gallons, check your circuit, and pick the heater that matches the answer you already have.