Hayward HP21104T HeatPro Review (Titanium 110K BTU)


Hayward HP21104T HeatPro Titanium

With an average rating of 4+ from over 50 reviews in amazon, the Hayward HP21104T HeatPro is a very popular choice amongst above ground pool owners who are looking for a heater.


The HP21104T is compact and round shaped so that it can easily fit into tight spaces. As compared to other heaters, it is relatively lighter with a weight less than 250 lbs (114 kgs). With dimensions of 46 x 31 x 31.5 inches, it is quite compact indeed.


Unlike the ‘Cupro Nickel Heat Exchanger’ present in other heaters, this heater comes with a ‘Titanium Heat Exchanger’  which provides a more superior protection against corrosion caused by chemicals and salt water. This feature helps extend the life of the heater by a great factor by preventing damage to the interior parts of the heater.


Corrosion-Resistive Evaporator Fin

Corrosion-Resistive Evaporator Fin


If you live near the coastline, then you’ll be happy to know that the HP21104T comes with an “ultra gold” Corrosion-Resistive evaporator coil fin. All that jargon basically means that it provides a superior coastal corrosion protection.


Haywards have built a Digital LED control panel right into the heater making it convenient to read and set the temperatures. It also provides additional features like an electronic frost control and temperature lockout capability. The HP21104T provides 110K BTU which is sufficient to heat up to 1000 gallons of water.


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The table below will help you translate the heating capacity, given in terms of BTU, to a more practical term:

BTUGallonsSquare Feet
100,000 – 200,0001,000 – 10,000300
200,000 – 300,00010,000 – 20,000500
300,000 – 400,00020,000 – 40,000800
400,000+40,000 – 80,0001200


Acoustic Compressor Cover

Acoustic Compressor Cover

A common requirement of people looking to buy an above ground pool heater is that it shouldn’t be very loud when operating.

If you’re one of those individuals who want a very peaceful ambiance around your pool, then you should know that the titanium pro boasts an industry leading Quiet Technology. With an improved ‘Profiled Blade design’, it provides better airflow to and from the heater which results in quieter operations. It also has an ‘Acoustic Compressor Cover’ which minimizes the noise created by the heater’s compressor. This heater is also certified by the AHRI (Air-Conditioning, Heating, and Refrigeration Institute).

Other features of the heater include:

  • Heavy-duty and super-quiet scroll compressors for lower noise
  • Durable and injection-molded UV-resistant body panels
  • Stainless steel body
  • A polyethylene screen to protect the evaporator coil from damage



Overall, the Hayward HP21104T HeatPro Titanium 110,000 BTU is an efficient and quiet pool heater which is compact and rugged. It has ton of features and a superior build quality ensuring that it will last for a really long time. I would definitely recommend this to anyone looking for an above ground pool heater.

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If you’d like to explore additional options, then check out my list of the top above ground pool heaters here.

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