Top 8 Best Pool Heaters 2021 Reviews : Perfect For In Ground and Above Ground Pools

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Welcome to Best Pool Heaters Reviews feature. The swimming pool in your yard is one of life’s wondrous luxuries. The pool itself is essential, but you need to consider how you are going to heat your pool. Pool heaters allow you to take a dip even when the climate is cool, so you can enjoy more holiday time and family time. If you live in colder weather, then you need the heater which can increase the temperature of your swimming pool by a lot.

There are many things to consider before you by the best pool heater. You need to understand how much you are heating your pool by, power of the heater, power supply, and whether you want the best above ground pool heater or an in-ground model. We have included a buying guide, which will guide you during the process. See our recommendations Best Pool Slides and Best Robotic Pool Cleaners.

Types Of Pool Heaters

There are many different types of pools. Each has its own benefits and issues. Let’s take look at the various types of pool heaters that are available.

Electric Pool Heater: The electric pool heaters are one of the most popular pool heaters on the market. These heaters run off of an electric connection. They are very fast and can offer fast heat-up year-round. The more energy-efficient heater you pick, the less money you will pay per month.

Electric Pool Heat Pump: These are electric heaters but work differently from electric pool heaters. However, they don’t generate heat but move it from the air in the surroundings to your pool. They cost less than regular electric heaters, but your monthly operational pay will be more. The benefit of an electric pool heat pump is that they have great durability and will outlast almost any other heater. 

Solar Pool Heater: As the name suggests, this pool heater is powered by the sun. This type of heaters work pretty slowly and depend on how bright the sun is. The great news is that there are no maintenance costs once you have the heater installed. The bad news is solar pool heaters are the most expensive pool heaters to buy and install. Solar pool heater are the best in terms of eco-friendliness.

Natural and Propane Gas Heater: These types of heaters used to be most popular in the past. The rising gas prices have reduced their demand nowadays. These pool heaters are the most cost-effective to buy and will last the long time, but they’re currently the most costly to run on a monthly basis.

Comparison of Table

Preview Product Price
Hayward HP21404T HeatPro In Ground 140,000 BTU Heat Pump Hayward HP21404T HeatPro In Ground 140,000 BTU Heat Pump $8,100.99
Hayward H150FDP Universal H-Series 150,000 BTU Pool and Spa Heater, Propane, Low Nox Hayward H150FDP Universal H-Series 150,000 BTU Pool and Spa Heater, Propane, Low Nox
Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel Ray-014941 Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel Ray-014941 $2,889.49
Digital Heater BTUs: 250000 BTUs, Fuel Type: Propane Digital Heater BTUs: 250000 BTUs, Fuel Type: Propane
EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self Modulating Technology EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self... $857.89
FibroPool FH055 In Ground Swimming Pool Heater FibroPool FH055 In Ground Swimming Pool Heater $1,929.95
GAME 4721-BB SolarPRO Curve Solar Pool Heater, Made for Intex & Bestway Above-Ground and Inground Pools, Includes Intex Adapters, 2 Hoses & Clamps GAME 4721-BB SolarPRO Curve Solar Pool Heater, Made for Intex & Bestway Above-Ground and Inground... $239.98

Best Pool Heaters

Below are the Best Pool Heaters to buy in 2021.

#Hayward HP21404T HeatPro Titanium Heat Pump

This heater from Hayward is engineered for powerful performance. It stands out for its quiet operation, due to an acoustic compressor cover and scroll compressor with profiled fan blades for decreased wind resistance and noise.

The evaporator fin is made from corrosion-resistant materials, making this heat pump a good choice for pools that are in a tropical or coastal area with a lot of salt in the air. The heater is equipped with a titanium heat exchanger that ensures maximum heat transfer.

The body is sturdy so it will keep going for years to come. It comes with 140,000 BTU of heating power, it earns plenty of praise for its ability to instantly raise pool temperatures and extend swimming seasons. This heater comes with 3 different sizes.

Overall, this pool heater is perfect for new pools and existing system upgrades.

Hayward HP21404T HeatPro In Ground 140,000 BTU Heat Pump
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  • Acoustic compressor cover
  • Profiled fan blades
  • Ultra Gold corrosion-resistant evaporator fin
  • Round Design
  • UV-resistant body panels
  • Titanium heat exchangers
  • Polyethylene screen

  • Easy to install.
  • Extremely powerful.
  • Sturdy.

  • Heavy.

#Sta-Rite SR400LP Max-E-Therm Pool and Spa Propane Heater

If you are looking for a propane pool heater then Sta-Rite SR400LP is a great choice for you. It is one of the lightest heaters in its class. It heats fast and rated No. 1 in LP gas pool heater energy efficiency (84%).

This pool heater is enclosed in a matte black enclosure which is made from Dura-Glass. It is deemed to be rustproof, and it has pretty much resistance against corrosion. It has a compact design that is considered to be ideal for retro-fit installation.

It comes with PMG burner technology that alleviates the requirement for an outdoor draft hood. It features a digital temperature panel that makes it easy to check the temperature at a glance before changing the dual thermostat controls.

This pool heater is available in 3 different sizes.

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  • 84% efficiency rating
  • Rustproof housing made from Dura-Glass
  • PMG burner technology
  • Perfect for retro-fit installation
  • LED temperature readout
  • 6-position control panel
  • Temperature safety lockout

  • Compact design.
  • Lightweight.
  • Efficient.

  • High installation cost.

#Hayward H150FDP Universal H-Series Pool and Spa Heater

The H150FDP pool heater from Hayward is perfect for big pools and cold areas. The design is elegant that it looks like a small printer or photocopier. It has a heat exchanger made of Cupro Nickel which is supposed to be a sign of ultimate reliability.

This pool heater features bypass valve design and polymer header that increases hydraulic efficiency. It uses propane gas for carrying its operation. This propane heater is environment-friendly and guarantees low NOx emissions.

It comes with an LED control panel that provides digital temperature readout, diagnostics as well as electronic lock-out of temperature set-point. This pool heater is ideal for medium-sized in-ground pools as well as large above ground pools.

It is a universal fit so you can use it for existing installation as well as go for a new one.

Hayward H150FDP Universal H-Series 150,000 BTU Pool and Spa Heater, Propane, Low Nox
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  • Hayward Universal design
  • Standard Cupro nickel heat exchanger
  • Environmental friendly low NOx emissions
  • Patented polymer header
  • Bypass valve design
  • Forced draft combustion system
  • LED Control Panel
  • Available in different sizes

  • Easy to install.
  • Compact.
  • Fast action.

  • It may feel a bit noisy.

#Raypak 406,000 BTU Natural Gas Pool Heater

This pool heater from Raypak is great value for money and perform at optimum levels for long time. The high-quality Cupro-nickel fin tube can stand up to toughest of water conditions such as low pH, high flow, or heavy use.

The Capron resin headers prevent rust, helping to keep your pool clean. This pool heater maintains thermal efficiency over 83 percent and utilizes its Unitherm Governor to keep the water temperature above 105 F.

The temperature selection and heater settings are performed through digitally control LCD. The operating status is monitored with inbuilt diagnostic readout in a smart microprocessor.

The connection are easy with PVC 2 inch threaded union.

Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel Ray-014941
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  • Cupro nickel fin tube
  • Capron resin headers
  • Thermal efficiency above 83%
  • Temperature settings
  • Digital LCD controls
  • Smart microprocessor controls

  • Easy to install.
  • Silent
  • Powerful.

  • Heavy.

#Pentair 460733 250000 BTUs Propane Pool Heater

This propane pool heater from Pentair comes with a compact design. It is equipped with a cupro-nickel heat exchanger that ensures maximum heat transfer.

The pre-mixed air and gas mixture system provide MasterTemp to heat up fast. This pool heater is eco-friendly which is certified for low NOx emissions. It is powered at 250,000 BTU which is perfect for medium to large size pools.

This pool heater features digital display allows easy access to temperature settings with five LED system indicator lights. The company offers a 1-year warranty.

Digital Heater BTUs: 250000 BTUs, Fuel Type: Propane
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  • Cupro-nickel heat exchanger
  • Eco-friendly heater
  • Fully pre-mixed air and gas mixture system
  • Rotating digital display
  • Digital controls
  • Temperature settings
  • 1-year warranty

  • Easy to install.
  • Fast.
  • User friendly.

  • No cons.

#EcoSmart SMART POOL 27 Electric Tankless Pool Heater

The smart pool 27 tankless pool heater from Ecosmart has space saving design makes it perfect for small or large pools. This pool heater offers fast and efficient heating of pools up to 15,000 gallons.

If you pick an electric pool heater, keep in mind the required voltage to accurately and safely install the heater. It requires service from a 200 amp electrical panel, and you will need to connect it to 2 or 3 50 amp breakers.

This pool heater can raise water temperature by 10 degrees in the 15,000-gallon pool in 13.5 hours. It features digital thermostat control so you can easily set the temperature where you want it.

It is compatible with eco-smart remote control.

EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self Modulating Technology
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  • Flow sensor technology
  • Made of stainless steel
  • Efficient heating up to 15,000 gallons.
  • Digital thermostat control
  • Eco smart Remote Control

  • Compact.
  • Silent
  • Inexpensive.

  • Customer support is limited.

#FibroPool FH055 In Ground Pool Heater

The FH055 pool heater from Fibroheat is perfect for an in-ground pool. It has a footprint of 40×16-inches. It has an output of 55,000 BTUs, and while it is defined as an in-ground pool heater, also it can be used to heat above ground pools.

It heats in-ground pools up to 10,000 gallons or above-ground pools up to a 21′. This pool heater has Copeland high-pressure differential compressed and titanium heat exchanger. With two components, you can maximize energy efficiency and achieve COP of 5.92.

This pool heater works on electric power. It uses the 220V energy to offer a large amount of heat to the pool water in order to keep it hot. It features a digital display and controller.

FibroPool FH055 In Ground Swimming Pool Heater
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  • 16″ x 40″ footprint
  • Output of 55,000 BTU
  • Titanium heat exchanger
  • Copeland high-pressure differential compressor
  • Efficient Electricity
  • Digital control
  •  25 cents per hour
  • 17 Amps power-220 volts

  • Compact.
  • Excellent.
  • Excellent customer service.

  • No cons.

#GAME 4721-BB SolarPRO Solar Pool Heater

This solar pool heater from Game specifically comes with a design for most of them in and above ground swimming pools. It can efficiently enhance the water temperature of an 8000-gallon pool by almost 5 Degrees within 4 days. This heater is composed of high standard components that can hold up against regular exposure to solar power and other outdoor elements.

The exclusive curve shape of this machine maximizes the heat collection and distribution throughout the entire swimming area. There are trading posts present for versatile plumbing alternatives that offer efficient and natural temperature rise of the pool water. The heater is compatible with Bestways, Intex, and most of pool cleaners. The product comes in a package that includes Intex adapters, clamps, and two hoses.

The foldable and adjustable leg allows the machine to settle down for the highest sun exposure. The product also comes with a transparent cover that locks in the solar heat for enhanced performance efficiency. This pool heater delivers the highest heating output with maximum space-saving footprints. This 44.88X27.56X5.91 inches (HXWXL) dimensioned product is also exceptionally lightweight, with only 18.3 lbs of weight.

GAME 4721-BB SolarPRO Curve Solar Pool Heater, Made for Intex & Bestway Above-Ground and Inground Pools, Includes Intex Adapters, 2 Hoses & Clamps
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  • Heats 8000 gallon pool water by 5 Fahrenheit degrees
  • The runtime of 4 days
  • Foldable and adjustable legs
  • Cover for locking up the heat
  • Exclusive curve shape

  • Perfect for 18 inches pool.
  • Great job in maintaining the temperature.
  • Easy to setup.

  • Little flimsy.

Buying Guide: Best Pool Heaters

Before you decide to purchase the best pool heaters consider the following factors carefully.

Size: It is important to know how large your swimming pool is. Several models of pool heaters are meant for pools of different sizes. The larger your swimming pool is, the more BTUs are required to heat it efficiently. While more BTUs come at a higher price, you’ll save money in the long run.

In-Ground or Above Ground: Make sure that the type of pool heater you take is suitable for your pool type. Many pool heaters are specially designed to be used with either above ground or an in-ground pool. This is largely due to the different types of pools need different types of heaters. Not only the size of these heaters varied, but the connections also vary. Many pool heaters are compatible with all types of pools.

BTUs: British Thermal Units, measure the amount of heat a machine can produce. The pool heater with a high BTU can raise the pool water’s temperature quick, meaning less wait time to take a dip. The high-BTU pool heater uses more power than the low-BTU model. You must get a heater with sufficient BTUs to support the size of your pool.

Noise: There is nothing more disturbing that loud pool heater when you’re trying to unwind in style. Many companies address this issue by introducing noise-dampening elements into their pool heaters. If peace and quiet are essential to you, make sure that you pick a pool heater that runs almost silently.

Budget: There are many things to think than upfront costs when choosing a pool heater because each comes with its individual costs to maintain. You can get a heater from as little as $1000, and as much as $4000. The gas model is the cheapest of the bunch to buy, but if natural gas or propane costs in your region are high, then it could end up costing more each month.


The pool is becoming an affordable luxury, but there are certain things that are overlooked. After the pool filter system, the pool heater is definitely the best accessory for your swimming pool, no matter you have an above ground pools or in-ground pools. The pool heater can be expensive, but if you’re going to have a pool in your backyard and want it heated, then you want to make that investment. Electric, gas, and solar pool/spa heaters are intended to efficiently raise pool/spa temperatures. There are heaters that won’t cost as much money and others heaters which will cost you less in long-run, by costing you less on the monthly basis. Our buying guide will tell you everything which you need to know. We hope you found the Best Pool Heaters for your needs.


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