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What Is The Highest Temperature A Swimming Pool Heat Pump Can Heat To?

What is The Highest Temperature a Swimming Pool Heat Pump can Heat To?

One of the many advantages of having a swimming pool heat pump is being able to extend your swimming season. Those of us fortunate enough to live in warm weather can utilize our swimming pools year round thanks to heat pumps. For people who live in colder temperatures a swimming pool heat pump can help you extend your season well into the fall or even winter months. That being said, a lot of people wonder how high in temperature a heat pump can heat to, we will answer that question for you in this article.

This is a very common question from those looking to heat a swimming pool or spa. Typically, most homeowners look for about a 10° degree rise from the outside temperature to the swimming pool. We have seen most pools at a temperature of 86°-88° degrees Fahrenheit (30°-31° Celsius), but have known some to get in the upper 90°s (32° Celsius). Most spas are heated higher than that, some even to the limit of 104° degrees Fahrenheit (40° Celsius) All heat pumps have a limit of 104° (40° ) for safety reasons.

Location

Location of your swimming pool and weather conditions also play a big role in determining the efficiency of your heat pump and ultimately the temperature that you will be able to achieve. The more warmth and humidity in the air the more efficient the heat pump will be.

Other important factors that could affect temperature are things like water features and wind conditions. Solar pool covers as well as liquid pool covers will assist in trapping the heat in the pool.

Size

Properly sizing your swimming pool to the correct heat pump is also a very important step. You want a unit that is not undersized, as this would not provide you with the power you would need to achieve the temperature you are striving for. If you would like our help sizing your pool please click here

In Conclusion

As you can see by this article, there are many factors that influence the temperature to which a heat pump can heat your swimming pool or spa. Ambient temperature, water features, wind conditions, all of these play a role. There are options available to maintain the heat created such as solar covers and liquid covers for example help.

If you have any other question regarding this article or any of our other articles please do not hesitate to contact us or leave a message, we would love to hear from you!

This Post Has 9 Comments
  1. I have a Hayward gas heater for my pool. The maximum temperature the heater goes to is 90 degrees, I would love to keep my pool open for the winter but 90 degrees won’t be warm enough ( I’m in Ontario Canada) Is there anyway for me to jailbreak the heater so I can set the temperature to at least 100-102 degrees

    1. Good Afternoon Diane,
      Hope you are doing well. Most heating units have a maximum desired temperature setting of 104 degrees F’ as dictated by most countries’ federal law for safety.
      If you cannot set the desired temp above 90 on the Hayward Gas Heater. I would recommend contacting them to see if there is an issue with the control panel or control board on the heater.
      Thanks
      Robert Brown

  2. Hi,
    My heat pump for my inground pool will net set above 87 degrees. The pool installer stated this is because of the vinyl liner warranty. Have you ever heard of this? Rheem heat pump, saltwater pool, Aquamax liner. Thank you

  3. I'm staying at a rental home in Davenport Florida near Orlando . The owner says there is Florida law requiring pools not to be over 89 degrees .have looked at pool laws gov sites. Not. And since it is cool
    outside the pool is def COLD . Is there such a law ?

  4. Hi there – I live in Tenerife and we are being told by the "president" of our complex that the temperature of the pool (which at present is quite cold – the heater is only on during the day) cannot be increased due to the chemical balance. He states that a few years ago people were getting purple hair and nails due to the water being too warm. I pointed out to him that other complexes´ pools were much warmer than ours and he responded he just left it to the experts.

    Could you give me some advice as to the accuracy of this information please? Do his "experts" need to be educated?

    1. Hello Jan,

      Many people heat their swimming pools to comfortable levels during the cooler months without adverse effects like purple hair and nails. This would most likely be caused by pool chemicals, not heat. Raising the pool water temperature will increase the demand for chlorine to maintain a sanitized swimming pool, but this should not cause purple hair and nails.

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