Heat Pump Sizing Chart – Inground Pools

Pool Size (Feet) | Summer 4 BTU’s | Extended 6 BTU’s |
---|---|---|

Up To 10,000 Gallons 12′ x 24′ | 50,000 BTU | 85,000 BTU |

Up To 15,000 Gallons 14′ x 28′ | 85,000 BTU | 110,000 BTU |

Up To 20,000 Gallons 16′ x 32′ | 85,000 BTU | 125,000 BTU |

Up To 25,000 Gallons 18′ x 36′ | 110,000 BTU | 150,000 BTU |

## Similarly, how many square feet will a 18000 BTU heat pump heat?

18,000 BTU – **~850 sq.** **ft** to ~1250 sq.

Heat Pump Size | Square footage forHot Climate(Zone 1&2) | Square footage forWarm Climate(Zone 3) |
---|---|---|

2.5 ton | 1,000-1,300 sq ft | 1,200-1,500 sq ft |

3 ton |
1,300-1,600 sq ft | 1,500-1,800 sq ft |

3.5 ton | 1,600-1,800 sq ft | 1,800-2,000 sq ft |

4 ton | 1,800-2,000 sq ft | 2,000-2,400 sq ft |

## Thereof, how do I size a Hayward pool heater?

To heat your pool by 20 degrees in just 12 hours (i.e. half the time), **multiply the number of BTUs per hour by two**. In our example this means that to heat your pool by 20 degrees in 12 hours you would need a heater with a capacity of 120,000 BTUs per hour.

## Should you oversize a pool heat pump?

Generally speaking, **you should oversize the heat pump as much as possible**. You’ll never regret going too big, as doing so means warming the pool at a faster rate without running the heater as much.

## How do I calculate what size heat pump I need?

**Here’s the 1 rule of thumb:**

- 30 BTU of heating output per 1 sq ft of living space.
- Heat Pump Size (2,500 sq ft) = 2,500 sq ft * 30 BTU per sq ft = 75,000 BTU.
- Mini-Split Heat Pump Size (1,500 sq ft) = 1,500 sq ft * 30 BTU per sq ft = 45,000 BTU.

## Is it better to oversize or undersize a heat pump?

Overall, **an undersized heat pump is better than an oversized one**. An undersized heat pump will take longer to change the temperature. But, the unit won’t be as loud and will last longer. An oversized heat pump will turn on and off more frequently, which will use more electricity.

## What size heat pump do I need for 12000 gallon pool?

**50K BTU** heat pumps are meant for small pools, or aboveground pools, under 12,000 gallons.

## Can a pool heater be too big?

A pool heater can be undersized: if it cannot replace the heat lost through evaporative cooling, the pool’s temperature will fall below the ideal. However, **there is no such thing as oversizing a pool heater**. The larger the heater’s output, the faster it heats the water in the pool, and it will not begin short-cycling.

## How many kW Do I need to heat my pool?

kW power heat pump

The heat pump should be able to heat the water by approx. 0.20 – 0.25 degrees per hour. It takes 1.16 Wh to heat one litre of water one degree, which means **11.6 kWh for a 10m³ pool**. In other words, one kilowatt hour heats 862 litre of water by one degree Celsius.

## What size heat pump do I need for a 30000 gallon pool?

For pools of up to 20,000 gallons, small heat pumps like the Hayward 95K BTU output are suitable. Pools up to 30,000 gallons should look at the **AquaCal 120K BTU or higher**, and 40,000 gallon inground pools should look at models like the Pentair 140K BTU.

## What size pool heater do I need for 16×32 inground?

The easiest way to calculate BTUs

Pool Size | Gas Heater Size | Heat Pump Size |
---|---|---|

27 ft Round | 200,000 – 250,000 BTU | 100,000 – 120,000 BTU |

12 x 24 ft | 100,000 – 150,000 BTU | 70,000 – 85,000 BTU |

16 x 32 ft | 200,000 – 250,000 BTU |
110,000 – 120,000 BTU |

20 x 40 ft | 300,000 – 400,000 BTU | 120,000 – 140,000 BTU |