Answer
Sep 23, 2025 - 05:00 PM
There are a number of aspects to the question, and I’ll try to address them all.
For starters, the PAL Evenheat 65K heat pump is ideally recommended for 18,000 gallons or less. If you have 20,000 gallons, you would want to make sure to set your expectations that it will take a little more running time to reach temperatures and use more energy, which depending on your climate, pool design & environment, and how you run your pool system, isn’t necessarily a completely unrealistic thing. However, you could also consider the larger Evenheat 140k model to have much more control of temperature for longer throughout the year.
Also importantly, to address the premise of the question, you typically would not operate your heat pump in a way that would let you encounter that situation where large temperature swings are suddenly demanded. Instead, you would have it continually in operation maintaining the temperature across the season so the pool water doesn’t get down to the 50’s (similar to how you typically use a home heating/cooling system to maintain temperatures within a certain range).
But in reality you could perhaps encounter that situation, say if you install a new heat pump and the water is already cold. So if the air temp and water temp both happen to be in the 50’s, it could perhaps take a week to work up to that temperature, depending on the variables involved. When trying to greatly shift the temperature, you’d obviously expect the unit to run at its highest capacity, which is listed to be up to 14.8A at 230V, using about 3390 W. That’s comparable to what some large pool circulation pumps might use at full speed operation.
Maintaining the pool at the desired temperature uses much less energy and requires much less run time – especially when using a solar blanket or liquid blanket to prevent heat loss (which is a significant factor). Solar covers or liquid blankets are absolutely highly recommended.
When maintaining the temperature in colder weather, it would probably use a mix of its high and lower operation and may still need to run a larger portion of the day. In season with warmer air temperatures, you’d expect it to mostly use its lowest capacity when running, which is listed 2.3A at 230V, using about 530 W, and in many cases only needing a few hours of operation a day.
There are of course other factors that make every pool unique like when you run you pool system (during the day is ideal for heating) and for how long, the relative humidity, how much sun & wind your pool gets, how shallow the pool is, the surface area of the pool, whether there are features like waterfalls, spill-overs, or negative-edges, and more.
Please let us know what other questions you might have. Feel free to reach out at 866-766-5243
For starters, the PAL Evenheat 65K heat pump is ideally recommended for 18,000 gallons or less. If you have 20,000 gallons, you would want to make sure to set your expectations that it will take a little more running time to reach temperatures and use more energy, which depending on your climate, pool design & environment, and how you run your pool system, isn’t necessarily a completely unrealistic thing. However, you could also consider the larger Evenheat 140k model to have much more control of temperature for longer throughout the year.
Also importantly, to address the premise of the question, you typically would not operate your heat pump in a way that would let you encounter that situation where large temperature swings are suddenly demanded. Instead, you would have it continually in operation maintaining the temperature across the season so the pool water doesn’t get down to the 50’s (similar to how you typically use a home heating/cooling system to maintain temperatures within a certain range).
But in reality you could perhaps encounter that situation, say if you install a new heat pump and the water is already cold. So if the air temp and water temp both happen to be in the 50’s, it could perhaps take a week to work up to that temperature, depending on the variables involved. When trying to greatly shift the temperature, you’d obviously expect the unit to run at its highest capacity, which is listed to be up to 14.8A at 230V, using about 3390 W. That’s comparable to what some large pool circulation pumps might use at full speed operation.
Maintaining the pool at the desired temperature uses much less energy and requires much less run time – especially when using a solar blanket or liquid blanket to prevent heat loss (which is a significant factor). Solar covers or liquid blankets are absolutely highly recommended.
When maintaining the temperature in colder weather, it would probably use a mix of its high and lower operation and may still need to run a larger portion of the day. In season with warmer air temperatures, you’d expect it to mostly use its lowest capacity when running, which is listed 2.3A at 230V, using about 530 W, and in many cases only needing a few hours of operation a day.
There are of course other factors that make every pool unique like when you run you pool system (during the day is ideal for heating) and for how long, the relative humidity, how much sun & wind your pool gets, how shallow the pool is, the surface area of the pool, whether there are features like waterfalls, spill-overs, or negative-edges, and more.
Please let us know what other questions you might have. Feel free to reach out at 866-766-5243
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