Hayward Pool Heaters:
Advantages, Disadvantages, and Models to Consider

Hayward Pool HeatersHayward Pool Heater

Explore Hayward pool heaters; models, features, benefits, and top sellers. The wide selection of Hayward models allows you to choose the suitable model for your above-ground or in-ground pool, utilizing electric, gas, or heat pump technology. You can also buy a pool heater with the highest energy efficiency and innovative technology, or one that fits your budget, install it in a new or old pool, and reap benefits year-round.

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The main reason to buy a pool heater is to extend the swimming season, but as there are many brands and models, and with many options to select, the expected positive journey can quickly turn into a negative shopping experience.

Here we will present you one of the most popular brands in the swimming pool industry – Hayward; what the company offers, what you will get in return, and its best-selling pool and spa heaters.

Hayward pool heaters: Buying tips

How to choose the right type and size

Before looking into different types and models, first, you need to know the size of the heater. No matter the shape of the pool, select the model that corresponds with a pool's surface area (equal or greater). For a start, use this article to see how to calculate the surface area of the pool.

Type review

The Hayward manufacturer offers two types of pool heaters; gas-powered and electric heat pumps, designed for in-ground and above-ground swimming pools. There are also electrically-powered spa heaters, but they are mostly used in hot tubs and spas due to their lower power.

Gas pool heaters are recommended if fast water heating is required and where the stable water temperature is needed no matter the climate and weather temperatures. If planning to heat the water occasionally with steady performance, choose the gas pool heater.

For the most energy-efficient water heating, especially in warmer areas, heat pumps are the best option. They use electric heating elements and heat pump technology resulting in quiet, efficient, and slow water heating. They do not generate heat but move it from one place to another; heat pumps take the heat from the surrounding warm air and deliver it to water, increasing its temperature. Heating elements are used to improve the power and speed up the heating process.

Popular models

  • Hayward H250FDN – gas pool heater for in-ground pools
  • Hayward HP21404T – electric heat pump for in-ground pools
  • Hayward H100ID – pool and spa heater for above-ground pools

Hayward in-ground pool heaters review

Universal H-Series

Gas-powered pool heaters for in-ground pools come from the Universal H-series, offering models for different pool sizes (from small to large) and utilizing natural gas and propane. One of the top features - a cupro-nickel heat exchanger, comes standard in all models and is designed to offer high-efficiency heat transfer, including superior protection against corrosion and early deterioration when dealing with the wide variety of water chemicals and elements.

The Hayward manufacturer offers seven models to choose from, ranging from 150,000 to 500,000 BTU of power, ensuring fast water heating even in large pools of up to 1,500 sq. feet, increased comfort, performance, and reliability.

Except for efficient operation and lots of power it provides, the gas burner is also environment-friendly because the products of combustion have reduced NOx gas emission.

They heat water quickly while maintaining the set temperature regardless of the surrounding air temperature. Buy a pool heater based on the following sizing tips:

H500FD H400FD H350FD H300FD H250FD H200FD H150FD
Power (BTU) 500,000 399,900 350,000 300,000 250,000 199,900 150,000
Efficiency (%) 83 84 83 82.7 83 83 82.7
Surface area (sq.ft) 1,500 1,200 1,050 900 750 600 450

HeatPro heat pumps

HeatPro heat pumps could save up to 80% on energy costs when compared to gas models. They use electric heating elements for direct water heating and heat pump technology to extract the heat from the surrounding warm air. The heat pump uses a heavy-duty scroll compressor, ensuring efficient but silent, durable, and reliable operation.

Unlike gas models that utilize heat exchangers made of copper-nickel alloy, HeatPro heat pumps are designed for a harsh environment. It is equipped with the Ultra Gold corrosion-resistant evaporator and heat exchangers made of titanium. Such excellent quality of materials allows installation of the heat pumps in coastal regions.

There are seven models for you to choose from, offering power from 95,000 BTU to 140,000 BTU and efficiency up to 6.0, where the energy cost reduction goes up to 70-80%.

Due to the significant savings, heat pumps are recommended for pools that are used daily in warmer areas but are not recommended to extend the swimming season in other cooler seasons.

While most models are designed for a warm climate, the HeatPro Low Ambient models can heat the pool even when the weather gets colder.

Electric spa heaters

Electric spa heaters from the Hayward CSPA series are small and lightweight appliances designed for heating water, mainly in hot tubs and spas. Two models are available with heating elements that can produce up to 11 kW of power, operate on 240 V, and heat up to 1000 gallons of water.

Summit XL heat pumps

Hayward pool heaters from the Summit XL series come with commercial-grade components, innovative technologies, and long-lasting warranties. They are ideal for families who want more, add value and are not constrained by the budget.

They offer three types of Expert Line pumps, all high efficient and powerful.

As the HeatPro heat pumps, the Summit XL model also comes with Titanium heat exchangers for improved heat transfer and corrosion resistance and electronic temperature control to maximize savings and ensure convenient operation. Models are AHRI certified, so you are getting a model with the highest quality and value.

There are two models available with 112,000 and 140,000 BTU power, where the maximum C.O.P. is 5.7.

Hayward above-ground pool heaters review

There are two groups of Hayward pool heaters designed for the above-ground pools:

  • H-Series
  • Heat pumps


Pool heaters from the Hayward H-series are recommended for above-ground pools and spas and can deliver the power of 100,000 BTU (model H100ID) and 135,000 BTU (model H135ID).

With induced draft technology, they can provide the highest performance no matter the weather condition. They are much smaller than the heaters for in-ground pools due to their lightweight design of up to 100 pounds, which is several times lighter than the models from the Universal H-series.

A smaller model - H100ID is simpler; it offers the On/Off switch for temperature control, while the H135ID model comes with an easy-to-use control panel and digital thermostat.

The H100ID model uses the copper heat exchanger and direct electronic ignition, while the larger unit utilizes a heat exchanger made of cupro-nickel alloy and hot surface ignition (silicon nitride) for better performance and reliable operation. Also, the H135ID models can reduce the pump run time, therefore controlling the water flow to maximize the performance. They are equipped with an eco-friendly gas burner made of stainless steel resulting in low NOx gas emission and long life.

Heat pumps

Heat pumps HP50TA and HP50HA are recommended for spas and above-ground pools with a maximum capacity of up to 13,000 gallons.

There are two sizes available, 45,000 and 50,000 BTU, operating in both natural gas and propane. Like its big brothers, they are equipped with a titanium heat exchanger and electronic temperature control, ensuring better protection, accurate control, and savings.

Except heating, heat pumps can also decrease the water temperature, so great comfort is guaranteed even during hot days.

Features to consider

Speed pump

Hayward pool heaters that include the variable speed pump are the best choice, as they don't work with full power all the time. There is no additional equipment to buy. The system can be automated for more savings and convenience, allowing full programmability using the 24-hour time clock and up to 8 custom speed and timer functions.

The EcoStar feature can save up to 90% on energy costs or up to $1500 per year.

If you prefer a cheaper model but still would like to save, a TriStar 2-speed pump is also something to check out, as the energy savings are up to 70%.


An automation control, known as ProLogic, allows you to save more when paired with the pump, reduce the use of chemicals, program filtration, and other functions. When used with the Universal ColorLogic, you can have both pools and spas illuminated for an excellent visual experience.


The SwimClear cartridge filter could save up to 92% of energy as it eliminates backwashing.

Environment-friendly design

Environment-friendly design in gas pool heaters allows low NOx gas emission and reduced carbon footprint.

Heat exchanger

Cupro-nickel heat exchangers are standard, but those made of titanium ensure the quality and longest operation.

LED digital control panel

A digital control panel is a neat feature to have as it provides an easy way to set and control the temperature, check the status, and diagnose if there is a problem. The benefits of using the control panel are better accuracy, water, time and money savings, and better overall comfort.

Top selling online models

Hayward H250FDN pool and spa heater

Feature highlights:

  • 250,000 BTU of power and 83% thermal efficiency.
  • Cupro-nickel heat exchanger ensures durable and long-lasting work.
  • Patented polymer header provides amazing hydraulic performance and protection.
  • Hydraulic design reduces circulation pump run time which guarantees energy savings.
  • Forced draft combustion system ensures perfect gas combustion no matter the outside weather conditions.
  • Control panel provides easy temperature control and readout, including diagnostics.
  • Eco-friendly stainless steel gas burner guarantees low NOx gas emission.
  • Silicon nitride hot surface igniter offers durable and reliable ignition.

Hayward HP21404T – electric heat pump for in-ground pools

Feature highlights:

  • 140,000 BTU of power and C.O.P. of 5.7.
  • Titanium heat exchanger ensures long life and high efficiency even in severe weather conditions.
  • Ultra Gold corrosion-resistant evaporator allows installation in coastal regions.
  • Heavy-duty scroll-type compressor lasts long and provides quiet operation.
  • Acoustic compressor cover and specially designed fan blades for the reduced noise level.
  • Electronic temperature control.

Hayward H100ID – pool and spa heater for above-ground pools

Feature highlights:

  • 100,000 BTU of power, so it is recommended for pools less than 450 sq. ft.
  • Induced draft technology for reliable operation even in windy conditions.
  • Equipped with the direct electronic ignition.
  • Jet-ported burners and FireTile combustion chamber ensure quick heating and long life.
  • Lightweight – only 75 pounds.


Hayward swimming pool heaters are designed for efficient and long-term water heating without hassle, worries, and unreliable swimming experience. All the models mentioned above are not only equipped with the most advanced features for a fancy look and simple water heating, but they help in reducing pollution, energy use and save you money.

The Universal H-series provide reliable pool water heating with a steady temperature year-round, while HeatPro heat pumps ensure efficient and cost-effective solutions in warm areas.

No matter if you are going to select a heat pump or gas-powered type, rest assured that you can now swim and enjoy pool parties not only in the summer but in other seasons as well.

How to contact Hayward:

Official website: hayward-pool.com

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