5 Best Swimming Pool Heaters (Reviews Updated 2022)

This post contains affiliate links, and I will be compensated if you make a purchase after clicking on my links, at no cost to you.
With a swimming pool heater, you can make the best of the cold months and warm up with loved ones in your pool. They are designed to raise the temperature of your pool water and allow you to have all the swimming fun against the odds of freezing weather and while most people are dreaming of the warmth that comes with summer. The ideal swimming pool heater should deliver hot water at an impressive flow rate, should be eco-friendly, be highly durable, and should not be too expensive to power.

Best Swimming Pool Heaters

To save you the hassle, we have compiled a list of our top five swimming pool heaters that deliver excellent heating performance without drilling a hole in your pockets.

1. Smartpool S601P SunHeater

Smartpool S601p Sunheater

The Smartpool S601P SunHeater sports a polypropylene heat collector to heat water using sunlight and is one of the most affordable swimming pool heating options on the market. It comes with 80 square feet of heating panels, can be mounted on the roof, and is the ideal eco-friendly option for in-ground pools. It is a great buy for moderately cold regions (not freezing cold) and can lift the temperature of continuously flowing water by up to 6 ºC.

  • Highly affordable and convenient to use.
  • Eco-friendly and highly efficient.
  • Great for mildly cold regions.
Check Price on Amazon


2. FibroPool FH055 In Ground Swimming Pool Heater

Fibropool Fh055 In Ground Swimming Pool Heater

Using heat pump technology, the FibroPool FH055 delivers over 22 kW of heating power while drawing less than a fifth of that in electricity. Its Titanium heat exchanger ensures superior heat conductivity and lasting performance, while its durable housing will keep the unit in optimum condition for years to come. It comes with a digital display and controller for easy programming and is very easy to set up as it seamlessly interfaces with existing pool equipment.

  • Superior heating efficiency and low operation cost.
  • Highly durable and impact resistant.
  • Easy to operate and program.
Check Price on Amazon


3. EcoSmart SMART POOL Tankless Pool Heater

Ecosmart Smart Pool Tankless Pool Heater

The EcoSmart tankless pool heater comes with a flow sensor activation technology and delivers a continuous stream of hot water with over 27 kW of heating power. It is compact and lightweight, is easy to program with smart control, and can handle up to 12 gallons of water per minute. It can be used in series with other pool heaters and is great for both in-ground and above-ground pools.

  • Flow sensor activation for reliable performance.
  • Compact and lightweight with 12 gallons/minute capacity.
  • Easy to program and works well with other heaters.
Check Price on Amazon


4. Hayward W3H150FDP

Hayward W3h150fdp

This pool and spa heater from Hayward is propane powered and packs over 40 kW of heating power into a compact unit. Its cupro-nickel heat exchanger combines excellent heat conductivity with corrosion resistance, while it sports a state of the art hydraulic design to minimize operating costs. It comes with intuitive controls, is easy to maintain, and releases low emissions that meet international standards.

  • Very compact and highly heat efficient.
  • Corrosion-resistant and hydraulic design.
  • Easy control and maintenance, with minimal emissions.
Check Price on Amazon


5. Sta-Rite SR333LP

Sta Rite Sr333lp

The Sta-Rite SR333LP is a highly efficient propane pool heater for small to medium-sized pools. It sports a compact design, cuts down on operation costs, and is highly corrosion-resistant. It is very easy to control and delivers water at a high flow rate while handling the harshest running conditions.

  • Propane-powered and highly efficient.
  • Compact and inexpensive to operate.
  • Easy controls, high flow rate, and corrosion-
Check Price on Amazon


Swimming Pool Heaters Buying Guide

Unless you are a daredevil, you most certainly won’t want to take a dip in your pool during the cold months of winter. But with a swimming pool heater, you can keep your pool cuddly warm and enjoy year-long swimming fun against the odds of cold weather.

Our buying guide compiles a list of the very best swimming pool heaters selected based on their specified features to give you the best options to choose from. We then take it a step further to outline the necessary deciding qualities you should consider in a swimming pool heater before you make a purchase.

Heating Capacity/Power and Flow Rate

One of the most important factors to consider before getting a swimming pool heater is its heating power. This is the rate at which it produces heat and will directly determine how well it does its job. Measured in Btu/hour or Watts, higher heating power will mean shorter heating times before your pool reaches the desired temperature.

Also note that while your pool is being heated, it is also losing heat to the surroundings, more so in cold weather. To reach the desired temperature, your swimming pool heater must be powerful enough to overcome the rate of heat loss.

Heater Type

Swimming pool heaters come as solar heaters, electric heaters, and fuel-powered heaters. Solar heaters use heating panels that absorb the sun’s heat and transfer it to the pool water. In the modern era where emissions standards are stricter than ever, your choice for a swimming pool heater will depend on how ‘pro-earth’ you are. Solar swimming pool heaters offer the cleanest, emission-free operation but are limited in their temperature ranges. They are ideal for mildly cold regions and sure need good sunlight. They also require lots of space to effectively trap the sunlight.

Electric swimming pool heaters are also very clean and offer the advantage of being very compact. They are however very expensive to operate, more so for direct electric heaters. Heat pumps are cheaper and more energy-efficient.

Fuel or gas-powered swimming pool heaters are very affordable but release a lot of by-products into the atmosphere. They are, however, very efficient and are cheaper than electric models.

Pool Size

The size of your swimming pool is another important factor to consider. The larger your pool, the higher the heat capacity of the heater you will need. Larger pools also require higher water flow rates to get filled in a reasonable time frame and so your swimming pool heater must be able to handle the recommended flow rate for your pool.