When it comes to purchasing a pool heat pump, the most critical step is choosing the correct size for your above ground swimming pool. Getting this right from the start will make a significant difference in performance, energy savings, and your overall satisfaction.
A properly sized heat pump matched to the right BTU output will keep your electricity costs manageable while reducing the time it takes to reach your desired water temperature. This becomes especially important during the cooler months, when you want your heater working efficiently without running up your energy bill.
It is also worth noting the distinction between electric heat pumps and gas or propane heaters. Gas and propane units typically require a greater BTU rating than electric heat pumps for the same pool volume, so make sure you are comparing the right type when choosing your unit.
Electric Heat Pumps
Our electric heat pumps are an excellent way to extend your swimming season and maintain a comfortable water temperature throughout the year. Energy-efficient and reliable, they are designed to keep your pool warm without excessive operating costs.
Blue Torrent 110K BTU Heat PumpUse the heat pump sizing charts below to determine the correct BTU output for your specific pool. A higher BTU rating means greater heating power, faster temperature rise, and shorter run times — all of which translate to a better swimming experience.
Basic Principles for Sizing a Heat Pump
4 BTU
Per Gallon
Ideal for summer heating when ambient air temperatures average around 70°F. For a 10,000-gallon pool, you would need at least 40,000 BTUs within a 24-hour cycle.
5 BTU
Per Gallon
Recommended for spring and fall when the outside temperature averages closer to 60°F. This ensures your pool reaches the desired warmth within a full day of operation.
6 BTU
Per Gallon
Best for extended season use when air temperatures dip below 60°F. A higher BTU per gallon ensures efficient heating even in less favorable conditions.
Sizing Chart — Round Pools
Pool dimensions in feet
| Pool Size (Feet) | Summer 4 BTU/Gallon |
Spring & Fall 5 BTU/Gallon |
Extended Season 6 BTU/Gallon |
|---|---|---|---|
| Up To 21' Round | 50,000 BTU | 50,000 BTU | 65,000 BTU |
| Up To 24' Round | 50,000 BTU | 65,000 BTU | 85,000 BTU |
| Up To 27' Round | 65,000 BTU | 85,000 BTU | 110,000 BTU |
| Up To 30' Round | 85,000 BTU | 110,000 BTU | 125,000 BTU |
| Up To 33' Round | 100,000 BTU | 125,000 BTU | 150,000 BTU |
Sizing Chart — Oval Pools
Pool dimensions in feet
| Pool Size (Feet) | Summer 4 BTU/Gallon |
Spring & Fall 5 BTU/Gallon |
Extended Season 6 BTU/Gallon |
|---|---|---|---|
| Up To 15'x26' Oval | 50,000 BTU | 50,000 BTU | 65,000 BTU |
| Up To 15'x30' Oval | 50,000 BTU | 65,000 BTU | 85,000 BTU |
| Up To 18'x33' Oval | 65,000 BTU | 85,000 BTU | 110,000 BTU |
| Up To 18'x40' Oval | 85,000 BTU | 110,000 BTU | 125,000 BTU |
| Up To 21'x43' Oval | 100,000 BTU | 125,000 BTU | 150,000 BTU |
Sizing Chart — By Gallons
Based on total pool water capacity
| Capacity | Summer 4 BTU/Gallon |
Spring & Fall 5 BTU/Gallon |
Extended Season 6 BTU/Gallon |
|---|---|---|---|
| Up To 10,000 Gallons | 50,000 BTU | 50,000 BTU | 65,000 BTU |
| Up To 13,000 Gallons | 50,000 BTU | 65,000 BTU | 85,000 BTU |
| Up To 17,000 Gallons | 65,000 BTU | 85,000 BTU | 110,000 BTU |
| Up To 21,000 Gallons | 85,000 BTU | 110,000 BTU | 125,000 BTU |
We highly recommend pairing your heat pump with a solar pool cover. Covering your pool during the nighttime hours significantly reduces heat loss and slows chemical evaporation, helping your heater work more efficiently and saving you money over time.