Category Archives: pool heat pumps

What Size Swimming Pool Heat Pump Do I Need?


It is still warm outside but in another couple of months temperatures will start to drop. Now is the time to consider purchasing a pool heater if you don’t already own one.

A common question that consumers ask us when shopping for swimming pool heat pumps is: “How big does my heat pump need to be?” You should have a trained swimming pool professional size your swimming pool heat pump, as its size will depend on many factors. There are, however, general formulas we provide to our customers to approximate heat pump size. We explain how to use these formulas in this article.

Heat pumps are sized according to required BTU (British Thermal Unit) per hour of the swimming pool. Consumer often make the mistake of purchasing under-sized units – units with insufficient BTU output per hour. Under-sized units must run longer in order to heat swimming pools. These longer run times translate to decreased efficiency and higher operating costs. Use the following instructions to approximate the BTUs per hour your heat pump will require.

  1. Determine your desired water temperature in °F.
  2. Determine the average air temperature of the coldest month during which you plan to use your swimming pool in °F.
  3. Subtract the average air temperature from your desired water temperature to calculate the required temperature rise.
  4. Calculate the surface area of your swimming pool in ft2:
    1. Circular pools: radius x radius x 3.14
    2. Kidney-shaped pools: length x width x 0.75
    3. Oval-shaped pools: (0.50 x length) x (0.50 width) x 3.14
    4. Rectangular pools: length x width
  5. Calculate the required BTU output per hour: surface area x temperature rise x 12


By following these steps, you can quickly and easily approximate your required heater size. Remember, however, that only a licensed swimming pool professional such as Brother’s Pools can perform a proper sizing analysis!

Information in this article was taken from AquaCal – makers of fine Swimming Pool / Spa Heat Pumps.

How a Pool Heat Pump uses Electricity

heat pumps

If you are a swimming pool owner, you already know the importance of a swimming pool heat pump. If you are in the market for a home swimming pool, you’re likely going to get an education in heat pumps.

There are lots of things to know about pool heating pumps. The first thing deals with cost. We all want to keep our energy bills at a reasonable cost, so one of the first questions will likely be, “How much energy is needed for this heat pump?”

It’s a fair question. Yet, it’s important to understand how energy consumption factors into the overall cost of a swimming pool heat pump. It’s also important to be aware of the impact the heat pump will have on the environment.

Pool heat pumps tend to be very efficient, at least compared to fuel and gas burners. The reason for this efficiency starts with the design process. Pool heat pumps use the surrounding air to heat the swimming pool. The air is pulled into the heat pump by a motor turning a fan blade. The motor consumes only a small amount of electricity. This allows for an energy-efficient and cost-effective method of swimming pool heating.

If you have questions about a pool heat pump, stop in to Brothers Pool. The team at Brothers Pool is prepared to provide answers to your heat pump inquiries.


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Brothers Pool

250 Main Street. (RT 150)
Wallingford Connecticut 06492
P: (203) 265-5980
F: (203) 294-1601

Driving Directions

In Connecticut take I-91 North or South to exit 15. Take Route 68 West towards Wallingford and Cheshire. Turn left at the intersection of 68 and 150 (Main Street). Brothers Pool is about 1 mile on the left.

Office Hours

Monday - Friday: 10am - 7pm
Saturday: 9am - 5pm
Sunday: 11am - 3pm