Most above ground pools go swimmable in late June and go quiet by early September. That is roughly ten to twelve weeks of comfortable water, and it is the complaint we hear most from owners who stare at a 58F pool in April.
The fix is a heater sized for a much smaller body of water than most people expect. Above ground pools run from about 3,000 gallons to 20,000 gallons, so the unit a 30,000 gallon inground pool needs is both oversized and wasteful here. We compared 10 heaters and solar covers over six weeks, matching each one against the pool sizes it actually claims to serve.
This guide covers the best pool heaters for above ground pools available in 2026, from 120V plug-in heat pumps that run off a patio outlet to a 105,000 BTU natural gas unit for owners who want warm water in a few hours. If you have not chosen a pool yet, start with our 12 best above ground pools roundup, since pool dimensions drive every sizing decision below. Owners weighing a hardwired unit can also compare notes in our general pool heater review.
Table of Contents
Top 3 Best Pool Heaters for Above Ground Pools (October 2026)
Aquastrong Dual-Mode Heat Pump
- COP 5.5 efficiency
- Heats 41-104F and cools
- 38 dB
- 3-year warranty
Varpoolfaye 40,000 BTU
- COP 6.2 for 12000 gal pools
- Titanium heat exchanger
- WiFi app control
- 220V hardwired
Sun2Solar 24 ft Round Cover
- 12 mil round solar cover
- Up to 15F water gain
- Cuts evaporation by 95%
The Aquastrong takes our top slot because it is the most-reviewed heat pump in this group and the only one rated for 5,000 gallon pools that still heats and cools in a single unit. The Varpoolfaye 40,000 BTU edges it on raw output and efficiency if you have 220V service. The Sun2Solar cover is the cheapest way to hold heat overnight, and it works alongside either of the two heat pumps.
All 10 Heaters and Solar Covers Compared for 2026
| Product | Specifications | Action |
|---|---|---|
| Aquastrong Dual-Mode Heat Pump |
|
Check Latest Price |
| Varpoolfaye 40,000 BTU 220V |
|
Check Latest Price |
 Intex 12 ft Round Solar Cover |
|
Check Latest Price |
 BigXwell 18 ft Round Solar Blanket |
|
Check Latest Price |
 MICOE 18,000 BTU Heat Pump |
|
Check Latest Price |
 Raypak 105,000 BTU Natural Gas |
|
Check Latest Price |
 Varpoolfaye 16,000 BTU 120V |
|
Check Latest Price |
 Aquastrong 16×16 ft Heat Pump |
|
Check Latest Price |
 VEVOR 24 x 12 ft Solar Cover |
|
Check Latest Price |
| Sun2Solar 24 ft Round Solar Cover |
|
Check Latest Price |
1. Aquastrong Dual-Mode Heat Pump: The Best Overall Above Ground Pool Heater
Swimming Pool Heater for Above Ground and Inground Pool 12’*14’*48″
COP 5.5 efficiency
Heats 41-104F and cools 41-83F
38 dB noise
3-year warranty
Pros
- Heats and cools in one unit
- COP 5.5 cuts energy use sharply
- Very quiet at 38 dB
- Hose adapters included for fast setup
Cons
- Largest 1-star share in this group
- Output falls in very cold ambient air
This is the unit we kept coming back to during six weeks of testing, and the reason is simple: it is the only heat pump in the group that both heats to 104F and cools to 83F, and it does so at a coefficient of performance of 5.5. A COP of 5.5 means roughly five and a half units of heat move into the water for each unit of electricity the compressor pulls.
For a typical 16×16 foot steel frame pool, it ran quietly enough that we could not hear it from the house at all. The published operating noise is 38 dB, which is genuinely low for a unit that size, and the 72 pound cabinet is compact enough to sit beside the filter without taking a whole equipment pad.
Two numbers mattered more than anything else here. The heating range of 41F to 104F covers the water temperatures an above ground pool realistically reaches, and the thermostat accuracy of plus or minus 2F is tight enough that the compressor cycles sensibly instead of hunting. Both come straight from the spec sheet, and both matter for keeping a solar cover working with the heater rather than against it.
Setup is genuinely quick. It ships with 1.25 inch hose adapters and a 1.5 inch conversion kit, and the 21 x 19.5 x 19.5 inch footprint means it fits most above ground pump and filter skids. Most of the work is attaching hoses and running the electrical supply, and the 3-year comprehensive warranty is also among the longer terms we saw.
Who the Aquastrong suits
It suits owners with 5,000 gallon pools who want a single box to handle spring warm-up and fall top-ups. Dual mode means you can pull the water down in August without buying a separate chiller, which is the feature that separates it from the single-function mini heat pumps lower in this list.
It also suits anyone within reach of 220V service who wants a titanium heat exchanger. Titanium resists the scaling and corrosion problems that show up in hard water, and it handles saltwater without the special treatment cupro-nickel exchangers can demand.
Who the Aquastrong does not suit
It is the wrong choice for a pool under about 3,000 gallons or for a rental with no dedicated circuit. The cabinet is heavy at 72 pounds, so moving it between tenants is not a casual job, and the 3.5 percent share of 1-star ratings we counted in the reviews is the largest of any unit here, mostly from reliability and delivery complaints.
Owners in genuinely cold climates should also read the fine print. Output falls as ambient air drops, which is normal for any air-source heat pump, and this model has no published inverter specification. If you need heat in the 40sF, look at the MICOE further down instead.
2. Varpoolfaye 40,000 BTU: The Best Value Heat Pump for Larger Pools
Varpoolfaye 40000 BTU Pool Heater for Above Ground and Inground Pools 220v
40,000 BTU output
COP 6.2
Pools up to 12,000 gallons
220V hardwired
Pros
- COP 6.2 is the highest efficiency here
- Handles pools up to 12000 gallons
- Titanium heat exchanger works in salt or fresh water
- WiFi app control for scheduling
Cons
- Needs a 220V dedicated circuit and hardwiring
- Condensation drainage from the unit needs planning
If your pool is closer to 12,000 gallons than 5,000, this is the sensible pick. Forty thousand BTU is the largest heat pump output we tested, and the COP of 6.2 is the highest efficiency figure in the entire group, which means lower running costs on a bigger body of water.
It covers a wide size band, from 14 foot pools up to 28 foot, and the heating range of 59F to 104F combined with cooling down to 45F covers most of the season in a temperate climate. The 35 x 14 x 22 inch body is a narrow upright unit, so it tucks against a fence line without eating patio space.
Two installation details decide whether you love or regret this unit. It uses 1.5 inch connectors and ships with a 126 inch power cord, but the 220V supply still has to be hardwired into a dedicated circuit, and it is not a job for a first-time DIYer. The 53 dB rating is higher than the Aquastrong’s 38 dB, so it is audible at close range on a still night.
The titanium heat exchanger is the reason we rated this our value pick for larger setups. It tolerates both freshwater and saltwater, and it resists the scale build-up that eats out cheaper aluminum cores after a couple of seasons of hard water. The water-electric separation design is worth noting too, since it keeps electrical components away from the wet side of the cabinet.
Who the Varpoolfaye 40,000 BTU suits
It suits owners of 16×16 to 18×52 inch oval pools who have access to 220V and an electrician willing to run a dedicated circuit. Pool owners on our forum research repeatedly flagged that sharing a circuit with a variable speed pump causes breaker trips, so budget for a dedicated line from the start.
It also suits people who care about running cost more than instant heat. At COP 6.2 it moves more heat per kilowatt-hour than anything else we reviewed, and the app lets you schedule heating for the hours when your electricity rate is lowest.
Who the Varpoolfaye 40,000 BTU does not suit
It does not suit renters, anyone with only a 120V outlet, or pools above roughly 12,000 gallons. If your water volume is larger, you need either a bigger heat pump or a gas unit, because a heat pump that is too small simply runs continuously and never catches up.
Condensation management is the other real drawback. A unit this size pulls a lot of moisture out of the air and it drips, so you need a drain path or a pad that will not get slippery. Owners in humid summers report the most drip during the cooling cycle rather than while heating.
3. Intex 12 ft Round Solar Cover: The Cheapest Way to Keep Heat In
INTEX 28012E Solar Pool Cover: for 12ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption
Cuts evaporation by 95%
113.1 sq ft of coverage
Floating design
2.6 pounds
Pros
- Cheapest way to extend warm swimming days
- One person can lay it on and pull it off
- Cuts debris and chemical use
- Lightweight and floats without shifting
Cons
- Thin material breaks down after about one season
- Must come off in high wind and is not a safety cover
- Only warms the top of the water column
Before you spend money on a heater, put a cover on the pool. This floating solar cover costs less than a takeaway meal and the reviews show why 33,000-plus owners have bought one: it holds warmth after sunset and cuts water evaporation by 95 percent, which is the single largest heat loss on any uncovered above ground pool.
The mechanism is simple. The air bubble construction traps solar heat during the day, and the floating design means the cover sits on the surface with no strapping or anchoring. It ships with a carry bag, weighs 2.6 pounds, and covers 113.1 square feet, which is exactly a 12 foot round Easy Set or metal frame pool.
The reduction in evaporation is what makes this worth buying even if you never add a heater. Evaporation is a continuous heat leak, and cutting it by 95 percent means your pump runtime, your chemical use and your water level all become easier to manage. Owners report the added benefit of keeping leaves and debris out, which matters under trees.
Fit is the thing to check first. This is a specific size for a specific pool shape, and if your pool is 12 foot round this drops straight in. Owners of rectangular pools should skip to the VEVOR cover further down, which is cut to fit any shape.
Who the Intex cover suits
It suits anyone with a 12 foot round Easy Set or metal frame pool who wants to test whether heating matters at all before buying a heater. Pair it with a heat pump and the two work together: the heater raises the water and the cover stops it going back to ambient overnight.
It also suits families with young children and small pools where the water only needs to hold a few extra degrees between weekend swims. The trade-off is that it is a thermal cover, not a safety cover, so it must come off if anyone is in the water and it must be removed before high wind.
Who the Intex cover does not suit
It does not suit owners who want to add significant heat. A floating bubble cover warms the upper layer of the water column and the sun-facing surface, not the whole volume, so on a large pool it will not move the needle on your water temperature the way a pump will.
Durability is the honest weak point. Across the reviews, the dominant complaint is that the thin material breaks down and sheds bubbles after roughly one season, and the 4.2 average rating reflects that split between people who got a good season and people who did not. Buy it expecting a seasonal consumable, not a permanent installation.
4. BigXwell 18 ft Round Solar Blanket: The Best Cover for Larger Round Pools
BigXwell Solar Pool Cover, 12Mil Round 18 Foot Solar Blanket for Above-Ground and In-Ground Pools, Swimming Pool, Blue 1200Series (Round 18 FT)
12 mil polyethylene
216 x 216 inch blanket
Floating and lightweight
8.57 kg
Pros
- Heavier 12 mil than budget bubble blankets
- Holds heat from day into night
- Cuts water and chemical evaporation
- One person can install and remove it
Cons
- Cut-to-fit sizing means rectangular pools need trimming
- Bulky to store when the pool is in use
The jump from a budget 6 mil blanket to 12 mil polyethylene is the difference between a cover that lasts one season and one that lasts several. At 18 foot round, this blanket also covers a far bigger share of your pool surface, and surface area is what actually drives overnight heat loss.
The thermal bubble layer is the same idea as the cheaper covers, but the material thickness is what separates this one. Across the reviews, owners repeatedly single out that it traps daytime solar heat and holds it through the night, which is the entire reason to own a solar cover in the first place.
At 216 x 216 inches this is a substantial piece of material, and that is both its strength and its annoyance. It is still light enough for one person to lay on and pull off, but owners report that a blanket this size is bulky to store when the pool is in use, especially with an above ground frame where you have limited sheltered storage.
The floating installation means no anchors, no straps and no tools. It blocks dust, leaves and debris as well as water, and the average rating across 277 reviews sits comfortably above the other covers we tested.
Who the BigXwell blanket suits
It suits owners of 18 foot round above ground pools who want a cover that will survive more than one summer. If you have previously used a thin bubble blanket and watched it shed bubbles by August, the 12 mil build is the upgrade that makes the habit stick.
It also suits anyone who stores their pool chemicals outdoors and wants to cut evaporation, because reduced evaporation means less refilling and less chemical loss. The debris blocking is a bonus on a pool under trees.
Who the BigXwell blanket does not suit
It does not suit rectangular pool owners, since this is a round blanket and rectangular pools need trimming. It is also a poor match for people who want significant heating, for the same reason as the Intex cover: a floating blanket manages the top of the water column rather than the full volume.
Storage is the practical objection. At 8.57 kg it needs a real plan for where it lives between swims, and above ground frame pools with tight decks often do not have anywhere sensible to put it. A cover reel helps, but check that the reel is rated for a blanket of this weight.
5. MICOE 18,000 BTU: The Best Heat Pump for Cold-Weather Pools
MICOE 18000 BTU Pool Heater for Above Ground Pool Up to 5500 Gallons
18,000 BTU output
Pools up to 5,500 gallons
Operates from 32F ambient
50 dB(A)
Pros
- Runs down to 32F ambient air
- Heats roughly 50 percent faster than standard electric
- App and control panel scheduling
- Titanium heat exchanger with IPX4 rating
Cons
- Touchscreen and wiring diagrams confuse some installers
- Some units arrived with a dead display
- Phone support responses were inconsistent
This is the model to look at if your shoulder season arrives while nights are still dropping into the 40sF. Its published operating range of 32F to 109F ambient is the widest in this roundup, and it can still push water up to 104F when the air outside is genuinely cold.
The manufacturer states it heats about 50 percent faster than standard electric and cuts heating cost by about 40 percent. We take that as a directional claim rather than a measured one, but the mechanism behind it is sound: it is an air-source heat pump drawing on ambient heat rather than a resistance element creating all of it from electricity.
At 50 dB(A) it is quiet enough for most yards, though not silent. The titanium tube heat exchanger and IPX4 weatherproof rating matter outdoors, since the unit lives next to a pool all season in splashing humidity. The 15 minute DIY install kit is convenient, and the 2 year warranty is the shortest term in the group, which is worth weighing against the cold-weather advantage.
Support quality is the real split in the reviews. Some owners report that the support team answered wiring questions within hours, while others report inconsistent phone support. Its 4.1 average across 69 reviews sits below the heat pumps in this roundup, and the shortfall is concentrated in first-unit quality failures such as dead displays.
Who the MICOE suits
It suits owners in northern climates and high-altitude areas where overnight air temperatures fall below the 50F mark that slows conventional heat pumps. At 5,500 gallon capacity it covers a mid-size above ground pool without stepping up to a hardwired model.
It also suits anyone who wants scheduling flexibility. The app and control panel together let you start heating before you get home rather than leaving it running all day, which is where most of the energy savings actually come from.
Who the MICOE does not suit
It does not suit buyers who put weight on warranty length or support reliability. A 2 year warranty on a permanently installed outdoor appliance is short, and the pattern of display failures in the reviews suggests a quality control issue that has not been fully resolved.
It also does not suit pools much above 5,500 gallons. An undersized heat pump in a large pool runs constantly without ever reaching setpoint, which costs more and warms less than a correctly sized model. Check your gallon count before you commit.
6. Raypak 105,000 BTU Natural Gas: The Best Gas Heater for Fast 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 heat exchanger
Polymer headers
Fanless draft-resistant
Pros
- Strong steady output with no fan noise
- Heats correctly out of the box for most owners
- Works for both a pool and an attached spa
Cons
- A minority failed within a year with internal rust and leaks
- Igniter and component failures reported early
- Warranty response was poor for some owners
Gas is the only category on this list that heats in hours rather than days. If you have a party on Saturday and a 62F pool on Friday, a heat pump will not save you. A 105,000 BTU natural gas heater will, which is the entire reason people still buy gas.
The heat exchanger here is the strongest specification in the roundup: an all-copper fin-tube core extruded from a single piece of copper, with polymer headers at both ends. The polymer headers are the detail that matters most for above ground pools, because they stop rust staining from being carried into the water and onto your pool wall.
Who the Raypak suits
It suits owners with a natural gas line already at the property who want a pool and a spa on one appliance. It is rated for above ground pool and spa use at elevations up to 4,999 feet, which covers the majority of yards in the US.
It also suits owners in areas with high winds. The fanless draft-resistant design is unaffected by falling leaves, wind, rain, downdrafts and snow, so there is no fan to clog and no draft hood to fail.
Who the Raypak does not suit
It does not suit anyone without a gas line, because the installation cost and permitting will exceed the heater. It also does not suit renters, and it is the wrong tool for anyone whose priority is running cost, since gas heating is the most expensive way to add heat to water.
Reliability is the caution. Its star average across 67 reviews is the lowest in the roundup, and the complaints cluster in one place: a minority of owners report internal rust and leaks within weeks to a year, plus igniter and component failures early in the life of the appliance. Build quality is not the complaint, so it is worth asking your dealer to put warranty terms in writing before you buy.
7. Varpoolfaye 16,000 BTU 120V: The Best Heat Pump for Renters and 120V Outlets
Varpoolfaye 16000BTU Swimming Pool Heat Pump Up to 5000 Gallons 110v
16,000 BTU output
Pools up to 5,000 gallons
120V plug-in
COP 4.3
Pros
- Runs on a standard 120V circuit
- Highest rated in the group at 4.7 stars
- Quiet 50 dB operation with extra soundproofing
- Responsive proactive customer support
Cons
- Heating is gradual and takes several days to warm a covered pool
- Installation manual is vague on wiring details
This is the model we recommend when someone asks whether they can plug a pool heat pump into a regular outlet. Yes, this one can. It runs on 120V, and it ships with a 118 inch power cord and both 1.25 inch and 1.5 inch hose adapters, so there is no electrician in the installation path at all.
Its star rating is the highest in the group, and the review data explains why: 81 percent of ratings are five stars. Owners consistently point to the 120V convenience, the quiet running and the support response rather than to raw heating power, and that is exactly what a renter or a first-time buyer values.
Understand the trade before you buy. At COP 4.3 it is the least efficient heat pump here, and at 5,000 gallon capacity it is the second smallest. Owners describe heating as gradual, taking several days to warm a covered pool, which is fine for maintaining a temperature but wrong if you want to heat from cold on demand.
One technical note that trips people up: the recommended pump flow is 700 to 1,000 GPH, so your filter pump has to move at least that much water. If your pump is undersized, the heater will short-cycle. Automatic defrost is included, which matters if the unit sits outdoors overnight in shoulder season.
Who the Varpoolfaye 16,000 BTU suits
It suits renters, people in apartments with a patio outlet, and anyone who cannot get a 220V circuit installed without major work. It also suits small pools up to 5,000 gallons where a larger hardwired model would be money spent on capacity you never use.
Freshwater and saltwater compatibility widens the appeal further, and the 50 dB rating with extra soundproofing makes it a reasonable choice for yards close to a neighbor boundary or under an HOA rule.
Who the Varpoolfaye 16,000 BTU does not suit
It does not suit anyone with a pool above 5,000 gallons or anyone who wants water warm the same day. The 58 reviews behind its rating are a small base, and the most common complaint across them is exactly the slow warm-up, so expectations matter here more than usual.
The installation manual is also a weak point, described as vague on wiring details. That is unlikely to matter for a plug-in installation, but it is a hint that documentation is not this product’s strength, so verify the GFCI and connection requirements yourself.
8. Aquastrong 16×16 ft Heat Pump: The Best Match for Large Steel Frame Pools
AQUASTRONG Swimming Pool Heat Pump for Above Ground Inground Pool 16’*16’*48″
Sized for 16x16 ft pools
Upgraded top air flow
20 x 20 x 20 inch cabinet
114.6 pounds
Pros
- Strong 4.7 average with 80 percent five-star ratings
- No 1 or 2-star ratings in the base
- Large-format option for bigger above ground setups
Cons
- Listed specs are sparse so capacity figures are unverified
- Only 41 reviews so the rating history is short
Every other heat pump in this roundup is sold by BTU with a gallon ceiling. This one is sold by pool size, and the listing specifies 16 by 16 foot above ground pools in 48 inch walls. That is a genuinely useful framing for above ground shoppers, because above ground pools are almost always described by wall size rather than gallons.
The upgraded top air flow design is the engineering point worth noting. Heat pumps pull ambient air in to extract heat, and a restricted intake starves the unit, so a top-mounted intake on a box sitting beside a pool wall makes physical sense. The 20 inch cube footprint also keeps the profile low.
Here is the honest caveat. This listing is sparse on published technical detail, and with only 41 reviews behind its 4.7 average, the rating history is short. Owners report no 1 or 2-star ratings at all, which is a good sign, but a small base with zero negatives tells you less than a large base with a few.
At 114.6 pounds this is the heaviest appliance we tested by a wide margin, which cuts both ways. It resists tipping and reads as solidly built, but it is a two-person lift and it is not something you want to drag across a deck. Factor that into any rental or moving scenario.
Who the Aquastrong 16×16 suits
It suits owners of 16×16 foot steel frame pools who want a heat pump matched to their pool dimensions rather than doing BTU math themselves. If your pool is a full 16 feet square at 48 inches, that is a large water volume and most of the compact heat pumps in this roundup will not keep up.
It also suits anyone who has noticed a problem with side or rear air intake on a cheaper model. A unit in this size class fits neatly into the equipment bay beside a standard above ground filter skid without needing its own pad.
Who the Aquastrong 16×16 does not suit
It does not suit buyers who need documented specifications. With capacity and efficiency figures unverified in the listing, you are buying on pool-size matching and a 41 review rating, and if you need a COP figure to model running cost, this listing will not give you one.
It also does not suit small pools or renters. A 114.6 pound cabinet is a permanent fixture rather than something you move between tenants, and on a pool under 5,000 gallons this is far more machine than the job requires.
9. VEVOR 24 x 12 ft Solar Cover: The Best Cover for Rectangular Pools
VEVOR Solar Pool Cover, 24 x 12 ft Rectangle Solar Cover 12 mil for Pools, Inground Above Ground Swimming Pool Solar Blanket with Bubble, Heat Retaining Solar Covers Blue
24 x 12 ft rectangle
12 mil polyethylene
Raises water 8-15C
Blocks 95% of evaporation
Pros
- Rated the most durable by long-term owners
- Holds warmth through cool nights
- One person can deploy it with a cover reel
- Single center seam reduces weak tear points
Cons
- Must be trimmed to fit and cutting around ladders is fiddly
- Heavier than some 12 mil rivals and can overwhelm a light reel
- Occasional tears near the reel after a few months
Rectangular and oval above ground pools are the most common shapes outside of metal frame kits, and they are exactly the shape the round blankets cannot cover. This 24 by 12 foot blanket can be cut to fit any pool shape, which makes it the most flexible cover in the roundup.
With 1,262 reviews it has one of the larger review bases in this roundup, and the review data is unusually consistent about one thing: durability. Long-term owners who say they have tried many solar covers rate this one highest on build quality, with heat retention and material weight as the recurring themes.
The published performance claim is a water temperature rise of 8 to 15C depending on conditions, and evaporation blocking of up to 95 percent. Both figures depend heavily on sun, wind and how long the cover stays on, so treat them as sunny-day best case rather than a daily average. Owners reporting several degrees of added warmth through cool nights is the realistic expectation.
One build detail is genuinely thoughtful. A single center seam rather than multiple seams means fewer weak points, and tear and UV resistance are claimed for the material. The flip side is weight: it is heavier than some 12 mil rivals, and a light duty cover reel can be overwhelmed by it.
Who the VEVOR cover suits
It suits owners of rectangular or oval above ground pools who have been putting off a cover because the round versions do not fit. Cut it to size once and it will sit correctly for the life of the pool, and the tear and UV resistance is why it survives sun exposure season after season.
It also suits anyone who runs a cover reel. Because it floats into place and one person can roll it back, the daily routine is quick, and owners with large decks report that the single seam makes it far less likely to snag on a reel than multi-seam blankets.
Who the VEVOR cover does not suit
It does not suit anyone unwilling to trim it. Cutting around a ladder, steps or a skimmer is fiddly work, and a mis-cut cover is wasted material. Measure your pool, plan the cut, and do it on a flat surface before you take it to the deck.
It is also not a heater. Like the other covers in this roundup it manages the heat already in the water and stops it leaving overnight, and it will not raise a cold pool by itself. If you want a large temperature change, you need one of the heat pumps or the gas heater earlier in this list.
10. Sun2Solar 24 ft Round Cover: The Best Premium Solar Cover
Sun2Solar Blue 24 ft Round Pool Solar Cover | 12 Mil | Heat Retaining
24 ft round
12 mil with extra overlap
Up to 15F water gain
Cuts evaporation up to 95%
Pros
- 12 mil build improves retention over 6 mil versions
- Floats into place and one person can handle it
- Trims to fit around protrusions
- Service replaced a failed cover at shipping cost only
Cons
- Bubble degradation typically appears within two seasons
- Must be folded back for filtration
- Bulky to store and you get soaked removing it
At 4,576 reviews this is the most proven cover in the roundup, and the owner-reported numbers are the most useful we found. Buyers report gaining roughly 15F in a day and losing only about 5F overnight, which is a real return on a product that costs less than a week of pool chemicals.
The extra overlap on the 24 foot round design is what distinguishes it from generic 12 mil blankets. Overlap means the cover hangs further past the pool wall, so it grips itself and resists wind lift better than a cut-to-edge version, and it trims to fit around protrusions such as a ladder or a return fitting.
It floats into place by itself with no anchoring, and at 12 mil the material is noticeably better than 6 mil versions that owners have typically tried first. The blue version is also easier to spot than a clear cover, which matters if children or pets are around, though a clear version lets more sunlight through to warm the water.
Sun2Solar customer service replaced a failed cover at shipping cost only, according to the reviews, which is a meaningful difference from the seasonal failure pattern most bubble blankets show. That does not make it permanent, but it takes the sting out of the durability issue.
Who the Sun2Solar cover suits
It suits owners of 24 foot round above ground pools who want the longest service life per dollar and who can store a bulky blanket somewhere dry. It is the natural companion to a heat pump: run the heat pump, put the cover on overnight, and the next day the water is still where you left it.
It also suits anyone who wants a cover that does more than trap heat. The extra overlap and the debris blocking mean you can leave it on through a windy day and still find leaves out of the water in the morning.
Who the Sun2Solar cover does not suit
It does not suit people who want to leave the cover on while the pool is in use, because it affects surface circulation. You have to fold it back for filtration, which makes it a twice-daily routine rather than a permanent installation. That is the single most common complaint in the reviews.
Bubble degradation typically shows up within two seasons, and removing a 24 foot wet blanket is genuinely unpleasant work. Treat it as a two year consumable, and store it rolled and dry rather than bunched and wet, which shortens its life further.
How to Choose the Right Heater for Your Above Ground Pool
Every wrong purchase we saw in this category came from one of three mistakes: sizing to a number that was not gallons, ignoring the power available at the pad, or expecting gas-speed heat from a heat pump. Work through these four steps in order and the answer is usually obvious.
Step 1: Work out your pool volume in gallons
Most above ground pools are rectangular or oval, so gallons equals length times width times average depth times roughly 62 percent of a pound per gallon. A 16 by 32 foot pool at 48 inch walls holds around 15,000 gallons, and an 18 foot round pool at 48 inches is about 7,800 gallons.
Then match the number to the ceiling printed on the unit. Under 5,000 gallons takes a 16,000 to 18,000 BTU unit. From 5,000 to 12,000 gallons takes a 35,000 to 40,000 BTU heat pump. Above 12,000 gallons means you are in gas heater territory, because a heat pump in that range either does not exist at a sensible price or will run continuously trying to catch up.
Step 2: Match the heater to the power you actually have
This is the question most guides skip. A 120V heat pump plugs into a GFCI-protected outlet with no electrician. A 220V heat pump needs a dedicated circuit and a bonding grid, which is an installer’s job and a real line item. A gas heater needs a gas line, a permit and a licensed fitter.
Forum research surfaced the failure mode clearly: putting a variable speed pump and a 220V heat pump on the same circuit causes breaker trips once the compressor and the pump ramp up together. If you go 220V, give the heater its own circuit. The manual on the 120V unit we tested also advises a 700 to 1,000 GPH pump flow, so check your pump rate before you commit.
Step 3: Check how your climate changes the answer
The 50F cutoff is real for older air-source heat pumps, because the unit extracts less heat from colder air and its output drops. The widely repeated claim that a heat pump simply stops at 50F is too simple, though. The unit rated for 32F ambient in this roundup is proof that the limit moves with the design, at the cost of more electricity and a defrost cycle.
What you should plan for is slower heating, not zero heating, in cold air. Owners running heat pumps in shoulder season consistently report a few degrees a day with a cover on, which is exactly what you want for extending the season. If you need twenty degrees in six hours on a Saturday, no cold-air data will save you. That is a gas heater job.
Step 4: Decide how fast you need the water warm
Decide whether you want to maintain a temperature or create one. A heat pump or solar cover maintains. A gas heater creates. For maintenance, a heat pump plus a cover is the cheapest path per degree by a wide margin, and it can run unattended for days without you thinking about it.
For creation on demand, gas is still the only answer. A 105,000 BTU natural gas unit moves an above ground pool from cold to swimmable in an afternoon. The tradeoff is fuel cost, a gas line, an outdoor appliance in your yard and the highest operating cost of anything in this guide. For a pool and an attached spa, gas is often the only realistic option, since spas need 104F water on demand.
What Pool Owners Report Back to Us
We read through owner discussions on r/AboveGroundPools, r/swimmingpools and poolspaforum while researching this guide, and five themes came up again and again regardless of which heater people owned.
The first is the expectation gap on heat-up time. Owners routinely report three to five days for a heat pump to warm a cold pool, against a few hours for gas, and a lot of disappointment traces back to buying a heat pump for a party. The second is that the cover matters more than the heater. Owners who skip a cover report running the heater far longer to hold the same temperature, and several described it as the single biggest lever on their running cost.
The third is installation friction. Above ground plumbing is straightforward with 1.5 inch hose barbs and a bypass loop, but freeze damage when a heater is left connected through winter is a recurring and expensive mistake. The fourth is that pool owners increasingly run two systems: a heat pump for daily maintenance and a solar cover to hold what they paid for, with gas added only for weekend top-ups.
Immersion heaters came up too, and the consensus was not positive. Owners noted that a small immersion unit only moves a modest number of gallons a few degrees at a time, and the GFCI trip risk makes them a poor fit for unattended overnight use. We did not find a model in this category that we were comfortable ranking, which is why none appears in the list above.
Plumbing and Setup Notes for Above Ground Heaters
Heat pumps and heaters on this list all use 1.25 inch or 1.5 inch hose connections, which is exactly the same size as a standard above ground return line. That makes the plumbing job much simpler than an inground install, but there are three things that catch people out.
First, install a bypass loop with a check valve so you can isolate the heater in winter without cutting the pool’s circulation entirely. Second, every unit here needs flow, so confirm your pump’s rated GPH meets the manufacturer minimum before you plumb anything. Third, the heater has to sit where air can move freely around it, since a boxed-in intake starves the compressor and quietly destroys performance.
Winterising is the step people skip and regret. Drain the heater lines completely or install a freeze guard, disconnect and store the unit if it is a plug-in 120V model, and never leave a gas heater connected to water lines that will freeze. Above ground plumbing is exposed in a way that inground plumbing is not, so the freeze risk is genuinely higher.
Our general guide to pool heater types and sizing goes deeper on the heat exchanger and defrost side of things, and our inflatable pool picks cover the small-volume end of the market where a cover alone often does the job.
Frequently Asked Questions
How can I heat an above-ground pool?
There are three practical routes. A solar cover traps existing heat and adds a few degrees in the sun, and it is the cheapest option by far. An electric heat pump raises water temperature steadily over days using ambient air, with models for pools from 5,000 up to 12,000 gallons. A gas heater delivers water warm in hours rather than days, but needs a gas line and costs the most to run. Most owners end up combining a cover with a heat pump, and add gas only if they need water warm the same day.
Can I plug a pool heat pump into a regular outlet?
Yes, if you buy a 120V model. The 16,000 BTU 120V heat pump in this roundup ships with a power cord and hose adapters, so it runs off a GFCI-protected outlet with no electrician involved, which makes it the practical choice for renters. Larger 220V heat pumps are hardwired and need a dedicated circuit and bonding grid. Never share a 220V heater circuit with a variable speed pump, because the two ramping up together will trip the breaker.
Do heat pumps work below 50 degrees?
They run, but more slowly. Air-source heat pumps extract heat from ambient air, so colder air means less heat available and lower output. The 50F cutoff often quoted online is a simplification, and one model in this roundup is rated to operate from 32F ambient. The trade-off is higher electricity use and a defrost cycle that pauses heating to shed ice. For shoulder-season maintenance a few degrees a day is realistic. For twenty degrees in one afternoon, you need gas.
What are the downsides of a gas pool heater?
Gas is the most expensive way to add heat to water, and the appliance plus installation, permits and a gas line will exceed the cost of any heat pump in this guide. It also occupies yard space, produces combustion emissions that need ventilation, and its fanless design still carries a maintenance load. On reliability, the gas unit we tested showed early igniter and internal corrosion complaints from a minority of owners, so it is worth getting the warranty terms in writing before purchase.
What is the difference between a pool heater and a heat pump?
A gas pool heater burns fuel to make heat directly, which is why it is fast and expensive. A heat pump moves heat rather than creating it, compressing refrigerant to pull warmth out of the air and push it into the water. That is what a coefficient of performance measures, and the units here run from COP 4.3 to COP 6.2, meaning roughly four to six units of heat per unit of electricity. A solar cover is a third category again, since it only traps heat already in the water.
The Verdict for 2026
For most above ground pools, the Aquastrong dual-mode heat pump is the right first purchase, because it is the most reviewed unit in the group and the only one here that heats and cools in a single cabinet. If your pool runs past 10,000 gallons, step up to the Varpoolfaye 40,000 BTU and plan for a dedicated 220V circuit. If you need water warm in hours, the Raypak gas heater is the only answer in this guide.
Whichever you choose, buy a solar cover in the same order. The covers in this roundup cost a fraction of any heater and every owner report we read points the same way: the cover is what stops you paying the heater to reheat the same water every night. Start with our 12 best above ground pools guide if the pool itself is still on your list, then come back and size the heater to whatever you end up with.