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What Size Pool Heater Do I Need?

Domestic Hot Water Systems

A quality pool heater, properly sized, is essential if you want to receive the most use from your home’s pool. You can enjoy your pool during more months of the year outside of summer thanks to an effective pool heater keeping the water warm and pleasurable. If you have a pool, or are planning to construct one, you should arrange for installation of a pool heater.

However, a heater that’s the wrong size for a pool will cause problems. How can you know the correct size of heater? The easiest way is to contact professional installers, like those at Westland Heating and Air Conditioning. We’ve had extensive experience with sizing and installing pool heaters in Westlake, OH during the more the 25 years we have been in business. Call us today to set up an appointment for finding the right pool heater for your comfort. We will handle installation and the necessary maintenance as well.

Determining Pool Heater Size

Although you should leave the actual job of sizing a pool heater to trained professionals, we can give you a quick tour through the factors used in finding out the right size of heater.

One of the first things to know about sizing a pool heater is that water volume isn’t the essential aspect of determining how powerful the heater should be. A pool heater takes on the job of replacing the heat that the pool loses across its surface, so surface area is the most important specification to know about a pool.

The installers first take the average pool temperature you wish for comfort. They then determine the average temperature of the coldest month when you plan to use the pool, and subtract this temperature from the target temperature. This number is the temperature increase at its greatest that the pool needs.

Next, the installers calculate the surface area of the water in the pool in square feet, and use this formula to find out how many BTUs (British Thermal Units) per hour a pool heater must generate to reach the temperature increase: pool area X temperature increase X 12. The last multiplier is based on average heat loss considering wind speed and the rate of outdoor temperature increase, and the installers will adjust the multiplier according to your local conditions.

With the right installers with experience sizing pool heaters in Westlake, OH on the job, you will receive a system with the right BTUs per hour to keep your pool comfortable late into the season. Westland Heating and Air Conditioning has a team to handle this job, one familiar with local weather conditions that will factor into the calculations. Make us your first call for all your home heating needs.

Picture of Westland HVAC Team <sup>Author</sup>

Westland HVAC Team Author

The Westland HVAC Team is made up of experienced heating and cooling professionals serving Westlake, OH and surrounding areas. Specializing in HVAC repair, installation, maintenance, and indoor air quality solutions, the team provides practical, homeowner-focused guidance to help customers improve comfort, efficiency, and system performance year-round.

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