Finest pool heaters 2021

With the very best pool heaters you’ll by no means have to fret about ready for the water to warmth up earlier than you go for a swim. As an alternative, you’ll be able to profit from the hotter months by setting your optimum temperature upfront, after which having fun with your pool worry-free. This intelligent equipment will make your pool extra inviting on your company too, as, in any case, no person desires to plunge right into a freezing chilly pool. 

We’ve gathered collectively the very best pool heaters so that you’ve got the selection of the top-rated choices round, together with picks from Pentair, Hayward, and extra. If you’re trying to find the proper heater on your pool, look out for precisely how a lot energy every one has, and make your alternative between gas-powered or electrical fashions, with the latter being the extra sustainable possibility.

The most effective pool heaters are an funding on your house, however like the remainder of the work concerned in sustaining a pool, they don’t essentially come low cost. In the event you’re working inside a funds, ensure that to spotlight precisely which options are important on your heater, to keep away from getting carried away with extras. For extra methods to get pleasure from water remedy at house, take a look at our information to the greatest scorching tubs and the greatest swim spas

1. Pentair 460737 MasterTemp: Finest propane pool heater

Best pool heaters: Pentair 460737 MasterTemp

(Picture credit score: Pentair )

Pentair 460737 MasterTemp

The most effective power environment friendly propane gasoline pool heater


Dimensions: 36 x 25 x 30-inches | Gasoline kind: Propane Gasoline | Weighs: 128 kilos

Causes to Purchase

Finest-in-class power effectivity

Low NOx emission

Digital show

Causes to Keep away from

This propane gasoline pool heater heats up rapidly so that you gained’t have to attend round for hours earlier than taking the plunge. It’s licensed for low NOx emission and outperforms business requirements. It has a rotating digital show so it’s simple to view, and user-friendly indicator lights assist make it simple to each function and monitor efficiency. 

The powerful, rustproof exterior is designed to resist all weathers, extending its longevity. The compact design and quiet operation imply you’ll be able to swim in peace – it hardly makes a sound, so it gained’t intrude in your poolside enjoyment.

2. EcoSmart Sensible Pool 18: Finest electrical pool heater

Best pool heaters: EcoSmart SMART POOL 18

(Picture credit score: EcoSmart )

EcoSmart Sensible Pool 18: Finest electrical

The most effective electrical, tankless water heater


Dimensions: 6 x 14 x 17-inches | Gasoline kind: Electrical | Weighs: 24.5lb

Causes to Purchase


Digital temperature management


Causes to Keep away from

Complicated to put in

This differs from different electrical pool heaters in as far as it’s an electrical tankless heater. As an alternative of conventional stress swap activation, the EcoSmart Sensible Pool 18 makes use of movement sensor know-how, which will increase its reliability and longevity and likewise reduces the danger of components burning out. 

The EcoSmart Sensible Pool 18 electrical pool heater has a digital temperature show and dial that allows you to set your most well-liked water temperature in 1-degree increments. It may be used as a substitute for a warmth pump or as a booster. It’s compact and light-weight, and it’s energy-efficient – it doesn’t matter what the ambient temperature.

3. Hayward HeatPro HP21404T: Most economical pool heater

Best pool heaters: Hayward HeatPro HP21404T

(Picture credit score: Hayward)

Hayward HeatPro HP21404T

Save as much as 80% in your pool working prices


Dimensions: 32 x 43 x 40-inches | Gasoline kind: Electrical | Weighs: 250 kilos

Causes to Purchase




Causes to Keep away from

Not as quick as a gasoline heater

This HeatPro electrical warmth pump is right if you happen to’re in search of an electrical pool heater that may help you lengthen your pool season. It makes use of the surface air along with a titanium warmth exchanger and profiled fan blade to generate warmth for a fraction of the price of gasoline pool heaters. 

The producers say you can save as much as 80% in your pool working prices. In addition to being power environment friendly, it’s additionally simple to put in and quiet to run, so you’ll be able to get pleasure from your pool and yard with out the intrusion related to a loud pool heater.

4. Hayward H-Collection H250FDN: Finest pure gasoline pool heater

Best pool heaters: Hayward H250FDP Universal H-Series 250,000

(Picture credit score: Hayward )

Hayward H-Collection H250FDN

Excessive efficiency pure gasoline pool heater with low NOx emissions


Dimensions: 29.5 x 24 x 25-inches | Gasoline kind: Pure gasoline | Weighs: 165lb

Causes to Purchase

Low NOx emissions

Salt water and chemical corrosion resistance

Causes to Keep away from

The Hayward H-Collection H250FDN is an power environment friendly, excessive efficiency pure gasoline pool heater. The hydraulic design reduces circulation pump run time. It’s an environmentally pleasant possibility for a gasoline heater because it produces low NOx emissions. 

This heater has a regular cupro nickel warmth exchanger and affords final set up flexibility on new or current tools pads. The pressured draft system strikes air by the combustion chamber at a exact movement fee, eliminating the surface climate variables that may have an effect on the efficiency of a gasoline pool heater.

5. SmartPool SunHeater S120U: Finest photo voltaic pool heater

Best pool heaters: SunHeater S120U

(Picture credit score: SunHeater)

SmartPool SunHeater S120U

Warmth your pool with the facility of the solar


Dimensions: 120 x 27.5 x 16-inches | Gasoline kind: Photo voltaic | Weighs: 17.5lbs

Causes to Purchase

Simple to put in 

Causes to Keep away from

Requires lengthy hours of daylight

In the event you’re in search of an eco-friendly, cost-effective technique to warmth your pool, we expect that is it. The common system is appropriate for in-ground or above floor swimming pools, and this photo voltaic pool heater couldn’t be simpler to put in – it’s designed to be positioned in your roof, floor or fence, and it really works at the side of your current pool pump. 

This photo voltaic pool heater captures warmth from the solar’s rays and may increase the temperature of the water in your pool by 6-10 levels Fahrenheit, including weeks to your pool season.

Finest pool heaters FAQ

Which sort of pool heater must you select?

Understanding how every kind of pool heater works isn’t rocket science however a primary grasp of the logistics will allow you to select the very best heater on your pool. There are three major varieties of pool heaters; gasoline pool heaters, electrical pool heaters (together with warmth pumps) and photo voltaic powered pool heaters. 

The distinction between them is the facility supply they use, however this impacts every little thing from the set up course of to the operating prices, in addition to which climates they’re acceptable for.

Gasoline pool heaters

A gasoline pool heater runs in the same technique to your property’s scorching water heater – it burns pure gasoline or propane in a combustion chamber and transfers that warmth to the water because it circulates by the heater. It must be linked to a gasoline line by an underground gasoline pipe. Which means that whereas the preliminary upfront price could also be decrease than different varieties of pool heater, the set up prices are often greater. And relying on the placement of your nearest gasoline supply, set up may even be prohibitively expensive. 

Along with the added set up price, the continuing operating price of a gasoline pool heater is greater. The value of gasoline, which fluctuates, will decide the precise ongoing price of operating a gasoline pool heater.

Gasoline pool heaters are extra highly effective than different varieties of pool heater, in order that they’re good for heating larger swimming pools that maintain a big quantity of water, and helpful if you wish to warmth your pool in a rush. They’re additionally ultimate if you happen to stay in a cooler local weather, or if you happen to intend to warmth the pool sometimes and for brief intervals. In the event you’re in search of an eco-friendly technique to warmth your pool, nevertheless, a gasoline pool heater will not be the reply.

Photo voltaic Pool Heaters

A photo voltaic pool heater is essentially the most planet-friendly technique to warmth your pool. Not like different varieties of pool heater, photo voltaic pool heaters use pure power sources, making them essentially the most economical possibility. A photo voltaic pool heater makes use of photo voltaic collectors to switch the thermal power of the solar to the water within the pool. 

You place the photo voltaic collectors close to to the pool pump, so the warmth is transferred to the water because it’s pumped into the pool. When you’ve put in a photo voltaic pool heater, you’ll have nearly no upkeep prices and no month-to-month working prices. As soon as the panels are in place, you’ll be able to sit again and let the solar do its job.

A photo voltaic pool heater may be very simple to put in. They don’t must be linked to any form of power outlet, so that you gained’t want to rent an installer. They work slowly in comparison with a gasoline pool heater, however as soon as the pool reaches the specified temperature, it’s simple to maintain it there – simply bear in mind to make sure that each your pool and the photo voltaic collectors get loads of daylight and aren’t situated in a shaded space. 

This sort of heater is greatest suited to hotter climates that get loads of solar. If you wish to use the pool at night time with out experiencing colder water, chances are you’ll have to buy a diverter, so issue within the extra price of this.

Electrical Pool Heaters

As you would possibly anticipate, electrical pool heaters are the preferred kind of pool heater, and arguably essentially the most environment friendly. In addition to performing persistently year-round, an electrical pool heater is the quickest technique to warmth your pool. You’ll clearly have month-to-month prices with an electrical pool heater – consider that your electrical energy invoice will go up – however you’ll spend much less per thirty days if you happen to go for an energy-efficient electrical pool heater, in comparison with one which’s cheaper to purchase however has greater operating prices.

Electrical warmth pumps are extra eco-friendly than gasoline pool heaters as they use the ambient temperature to warmth the water. They don’t must be linked to a gasoline line, in order that they’re additionally simpler to put in than gasoline pool heaters. Electrical warmth pumps increase your pool’s temperature much less rapidly than gasoline pool heaters, however they are often stored operating longer for much less cash, in order that they’re less expensive if you wish to use your pool day-after-day.

How does local weather have an effect on your pool heater?

Local weather is already an enormous consider how typically you’ll use your pool, however how does it apply to your heater? Effectively, some varieties of pool heater rely closely on the ambient temperature of the pool, or daylight within the case of photo voltaic fashions, as a way to perform. So, there’s a really dependent relationship between some fashions and local weather. 

Ensure you issue this into any of your shopping for selections and calculations in terms of pool heaters. In the event you stay in a area with a gradual, scorching local weather, you then’ll be fantastic to go for a heater that’s reliant on the ambient temperature. If the local weather the place you reside tends to be slightly extra temperamental, then chances are you’ll wish to keep away from these sorts of fashions, so you will get extra out of your pool, and luxuriate in it even on days when the solar doesn’t shine. 

What dimension pool heater must you get?

Whether or not you need a gasoline, electrical or photo voltaic pool heater, selecting the right dimension heater on your pool is essential. Gasoline and electrical heaters are measured in BTU, or British Thermal Items. That’s the quantity of power it takes to boost one pound of water by one diploma. 

The extra it’s a must to increase the temperature by, the extra power you want. It’s value trying out one of many useful calculators on-line that will help you calculate the BTU you want in a pool heater. Seek the advice of a pool professional for extra particular steerage.

What are pool heater thermal items?

As with different family and out of doors merchandise that generate warmth, akin to gasoline ranges, for instance, all pool heaters are sized by British Thermal Unit (BTU). As a tough calculation, it takes one BTU to extend the temperature of 1lb of water by one diploma Fahrenheit.

The most effective pool heaters range from 75,000 BTU as much as a whopping, business grade 450,000 BTU for actually huge swimming pools, and clearly the upper the BTU, the dearer the pool heater. 

How lengthy do pool heaters final?

Investing in a pool heater is usually a expensive enterprise, and also you’re in all probability making an attempt to consider simply how a lot use you will get from this buy over time. The excellent news is that pool heaters are designed to final between seven to 10 years, so that you shouldn’t should fork out on a brand new one anytime quickly. Nonetheless, the lifespan of your pool heater is in fact depending on how properly it’s maintained, in addition to how wholesome your pool water is. Entering into a very good routine with pool cleansing is important, in addition to keeping track of chemical ranges under the floor. 

What’s the very best pool heater for you, and are they value it?

Your ultimate pool heater shall be dictated by the place you reside and what warmth supply you will have accessible, akin to gasoline, an electrical heater or a photo voltaic pool heater – a sensible choice if you happen to stay in sunnier climes with common sunshine. 

Pool heaters with photo voltaic covers are often cheaper in the long term and will help hold your prices down over time to return, although the preliminary outlay is often slightly pricier in comparison with a regular electrical pool heater.

Are pool heaters value it? In our opinion, sure. Even if you happen to stay in a state that’s fairly heat and sunny for many of the yr, there’ll nonetheless be days when the water temperature is lower than inviting. pool heater will guarantee your property pool stays open yr spherical, so you’ll be able to get pleasure from it way more and get your cash’s value.