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What Size Heat Pump Do I Need For My Pool

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Heat Pump Sizing Chart By Square Footage

What size electric heat pump should you get for your pool?
Home Size:
90,000 BTU 7.5 tons

You can see for the heat pump size table that, for example, a 2,000 sq ft house requires around 60,000 BTU or a 5-ton heat pump.

Lets solve two examples to illustrate how you can calculate what size heat pump you need manually and via the calculator:

What Size Heat Pump Do I Need For A 2,500 Square Foot House?

Lets say you have a bigger 2,500 sq ft home and you want to buy a heat pump for it. How do you adequately pinpoint how big a heat pump you need?

Well, you should call an HVAC expert, and he or she will use the 8 factors in Manual J to calculate the required size of the heat pump. For you to get a feeling of how many BTU heat pump you should be considering, you can use the simple 30 BTU per 1 sq ft rule to estimate the size of the heat pump for a 2,500 sq ft home.

Lets do some manual calculating:

For 1 sq ft, you would need 30 BTU of heating/cooling output.

How many ton heat pump you need for 2,500 sq ft?

Heat Pump Size = 2,500 sq ft * 30 BTU per sq ft = 75,000 BTU

You would need about 75,000 BTUs. If you convert that into tons, thats a 6.25-ton heat pump. If you convert that into kW, thats a 22 kW heat pump.

In short, for a 2,500 sq ft home, you would require a 6.25-ton heat pump.

Lets see if the Heat Pump Size Calculator also gives us the 75,000 BTU result for a 2,500 sq ft home:

The calculator confirms that our manual calculation was correct.

What Size Heat Pump Do I Need For A 1,500 Square Foot House?

Heres the calculation:

How The Size Of The Swimming Pool Influences Which Heat Pump To Get

You will see lots of guides and calculators online that can roughly calculate what size heat pump you need, but itâs important to remember that they should only be used as guides only. The factors outlined above will all greatly influence what kind of heat pump you will need to effectively heat and cool your swimming pool. Below is a very loose, rough guide to what the heat output would need to be to effectively heat 4 different sized pools. But again, this would depend on a number of factors, in particular the surface area of the pool. Our experts at Calorex can help you make the most effective decision and purchase possible â in terms of both power and cost.

Pool volume
113,652.25 41.02

Of course, the bigger the pool, the more power it will take to heat it. Thatâs why we offer a range of small and large heat pumps to cater for residential and commercial-sized pools.

Inttex Solar Cover For 18ft Diameter Easy Set And Frame Pools 54

Specifications: dimensions 18.9 x 13.39 x 22.83 inches, solar heating retaining cover, reusable bag, weight 8.3 pounds,

This type isnt precisely a heater like the others on our list so far, but instead its strength is in its ability to absorb heat from the sun, and retain the heat already in your pool, while also preventing evaporation. It spans 18.9 x 13.39 x 22.83 inches in diameter, and it is used by being spread across the surface of your pool, covering it and preventing heat escape as well as evaporation.

The material is designed with several small plastics which are contained in blue bubbles pop covers, which is directly responsible for the capturing and retaining of heat in the pool. The material itself is designed to hold back regular evaporating water vapours from escaping the pool , and also it can retain heat as much as 92 to 108 degrees in the Arizona region.

This heat retainer type of heater is basically the easiest to use, coming at a meager price, and virtually adds an additional zero costs during usage, which is why many people go for it today. It has a real disadvantage though in its inability to stand the test of time. Over a period of time, the bubbles start to break, and can even be a source of pollution to your pool water.


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Estimating Heat Pump Pool Heater Costs And Savings

For an outdoor pool, use the following tables to help estimate your annual heat pump pool heater costs and savings compared to using an electric resistance or a gas pool heater.

Table 1 estimates annual heat pump pool heating costs by location, by water temperature, and with or without using a pool cover.

Table 1. Costs by Location of Heating Outdoor Pools with a Heat Pump*

$200 $800

*Based on an electric resistance heated pool, which costs $1,000 per year at an electric cost of $.1301/kwh, and using a gas pool heater with a 55% efficiency at a cost of $1.09/therm. A seasonal average COP of 5.0 was used to determine heat pump savings.

How Many Btu Do I Need To Heat My Inground Pool

Diy Solar Pool Heater Pump Size
Pool Size
Up To 25,000 Gallons 18 x 36 110,000 BTU

Step 2: Divide your Surface Area by 3 Therefore, the minimum size heater that is recommended for a 15 x 30 pool is 150,000 BTUs. Keep in mind, this is simply the recommended minimum size.

Subsequently, question is, what is the best pool heater for inground pools? Top 10 Best Pool Heaters:

  • Hayward H400FDN Pool Heater Best Overall.
  • Hayward HeatPro Titanium Best Electric Pool Heater.
  • EcoSmart Electric Pool Heater Best Value.
  • Hayward Above-Ground Pool Heaters.
  • Smartpool Inground Sun Pool Heater.
  • Raypak Gas Pool-Heater.
  • FibroPool FH055 Pool Heater.
  • People also ask, how many BTUs do I need for my inground pool?

    In-ground pools and spa general run from 100K to 400K BTU. For an average 15 x 30pool , a 300K BTU heater would raise your pool temperature 2 degrees per hour a 400K BTU heater, 2.7 degrees per hour.

    How many BTUs do I need?

    Size and Ceiling Height

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    Divide The Pools Surface Area By 3

    The pools surface area divided by three gives you the minimal BTU size recommended for that particular surface area. Continuing the example above with the 15 x 30 pool, after dividing by 3, you get 150. Therefore, the minimum size heater that is recommended for a 15 x 30 pool is 150,000 BTUs.

    This is simply the recommended minimum size. I always go higher. Especially when it comes to gas heaters, you always want to oversize the unit. The job of a pool heater is to replenish the heat loss at the surface of your pool. Most heat loss happens overnight. Without a solar cover, there is no way to make up for the loss. Thats when having a higher BTU size comes in handy.

    How Warm Should My Pool Temperature Be

    The recommended pool temperature range is 77-82, but it is okay to increase the temperature slightly higher than this. A lot of people find 85-88 enjoyable. You can try different temperature levels to find out which ones you enjoy best. Just be careful not to go above 90-95 as the excess heat can cause cardiac arrhythmias which could be fatal. Likewise, anything below 77 can affect your breathing and cause hypothermia.

    Also Check: What Type Of Above Ground Pool Is Best

    Pool Heat Pump Sizing: How To Size Your Heat Pump

    • |February 24, 2021

    Heating the water in a pool makes swimming more enjoyable for everyone.

    With different types and sizes of heaters available, heat pumps are an energy efficient and effective solution to warming up pool water.

    But if youve decided to go electric, youll need to figure out how to get the correct pool heater pump sizing for your pool.

    Important: This article is about sizing electric pool heat pumps, not gas pool heaters. If youre looking for the latter, please read our article on sizing a pool heater.

    Skip to:

    How To Heat A Pool Fast

    How Fast Can A Heat Pump Heat A Pool?

    Using solar blankets is a good way to heat up your pool, making it an excellent choice for above ground pools. Since pools lose about 75% of their heat through evaporation, solar panels are designed to stop this evaporation while absorbing and retaining heat from the sun.

    They are efficient for heating up pools in the day, and keeping them warm at nights, though 100% of the surface of the pool must be covered by these solar blankets for it to work well.

    You can also make use of solar rings, which has exactly the same working principle as the solar blankets but are much smaller and easier to store. They can generate up to 21,000BTUs of heat per day and only need to cover about 70 to 80 percent of the pool surface.

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    What Else Do You Need To Know About A Heat Pump

    The choice of location is also very important because the heat pump needs very large amounts of air to function properly! For this, a suitable place for the fresh air must be found in most cases indoor operation does not work.

    The heat pump itself is then integrated directly into the filter circuit, after the filter system and before the chlorinator if fitted.

    High-quality heat pumps are equipped with corrosion-protected heat exchangers and can thus heat any swimming pool water, whether it is cared for with chlorine, bromine, ozone or chlorine-free products. The use for pools with sea water is also possible.

    With all pools other factors including solar gains, wind factors and evaporation losses need to be taken into consideration. This article is to give a bit of insight on one way of sizing.

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    Pool Heat Pump Sizing Calculator & Chart Guide

    The right size of pool heat pump will be beneficial in many ways by keeping the runtime to the optimum level, reducing the energy used to heat the water, and generally knowing when the pool would have been heated enough for a swim in your weather of choice.

    In this guide, we look at the typical pool heat pump sizing parameters such as the factors determining the size, the rules to choosing the size, and how to calculate the sizing of the pool. These aspects should always be put into consideration to save on time and money on your end.

    Read Also: What Is The Best Pool Cleaner

    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 Dont 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 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.

  • Determine your desired water temperature in °F.
  • Determine the average air temperature of the coldest month during which you plan to use your swimming pool in °F.
  • Subtract the average air temperature from your desired water temperature to calculate the required temperature rise.
  • Calculate the surface area of your swimming pool in ft2:
  • Circular pools: radius x radius x 3.14
  • Kidney-shaped pools: length x width x 0.75
  • Oval-shaped pools: x x 3.14
  • Rectangular pools: length x width
  • Calculate the required BTU output per hour: surface area x temperature rise x 12
  • How Many Btus Do You Need For A Propane Pool Heater

    What Size Heat Pump Do I Need For My Swimming Pool?

    Natural gas and propane heaters require a higher amount of BTUs for comparing to the same size pools. Look for your pool size below on the Heat Pump Sizing Chart to find the correct amount of BTUs for your pool. Size at 4 BTUs per gallon or 1 BTU per litre of water.

    Why is it important to size your pool heater?

    The size of your pool is one the most important things to keep in mind when sizing a pool heater. And this is because the amount of water a heat pump needs to heat directly correlates to how powerful it needs to be. So by that logic, the bigger your pool , the stronger/bigger your heat pump should be.

    What should the water temp be in a pool?

    Most pool owners want warm water between 82°F and 86°F. With heat pumps, they can only generate so much heat and will eventually top out due to their dependence on the outside temperature for the level of BTU output. Generally, though, you should be able to heat your pool to 82°F on warm days.

    Read Also: How Much Are Pool Sticks

    Pentair 460734 Mastertemp High

    Specifications: Compact, rugged casing design, 300,000BTU, digital controls with indicator lights, rotating digital display, certified low NOx emission, dimensions 36 x 25 x 30, weight 136 pounds.

    With a minimal and compact design, the Pentair 46734 master temp is powered by natural gas and does an outstanding job in heating above ground pools in a really short space of time.

    Its rugged casing on the outside is designed specially to withstand the harsh weather conditions generally experienced by items left in the open air, while it also not affected by stray water splashes that regularly happens around pools.

    With a really impressive output heat rating of 300,000BTU, this unit is able to cover extremely large-sized pools, heating the water up in a speedy and efficient fashion. It also comes with a digital display that carries indicator lights, making the unit very more modern, and allows the user to control and operate smoothly. This digital display is designed with controls at the front and center, hence no matter how the unit is positioned, theres always quick, easy access.

    Another cool feature about this unit is the presence of a cupro-nickel exchanger that makes sure this unit is able to withstand the unpredictable nature of water that might be used, such as very high flow rate, low PH value and extended runtime.


    Fibropool Fh120 Above Ground Swimming Pool Heat Pump

    Special features: 20,000BTU output, sleek design, clean heat pumps, rugged design, dimension 16 x 36 x 24 inches, suitable for large-sized pools, mounting options, item weight 74 pounds, digital display.

    This is an impressively powerful unit, with a BTU of 20,000, it is able to serve enormous pool sizes, enough to cover for both domestic and to an extent, commercial uses.

    The unit is designed to be rugged and very compact, though it still looks sleek, and this design affords it adequate weatherproofing therefore it can be left exposed to harsh weather conditions with little considerations for the adverse effects.

    On purchasing the product, it is effortless to install as you dont need any professional assistance as far as you know how to put a few things together. It should take about 30 minutes to install and kick-off fully. We would admit that this device is pretty weighty with about 74 pounds, which is why several provisions for mounting has been made.

    It also comes with a digital panel that gives quick and easy access to all of the products control parameters, while having options of add-ons to the unit that enables the user to control the device from a distance of comfort in the home. The unit is able to condition the pool of enormous capacity, keeping it warm even in temperature conditions as low as 400F, which extends your swimming seasons by months, while allowing you dictate your fun time.


    Read Also: Can You Fill Your Pool With Well Water

    How To Properly Size A Pool Heat Pump

    Heating or warming up a swimming pool with a pool heat pump is different from heating or warming it up with a traditional pool heater. What are traditional pool heaters? These are your electric pool heaters and heaters that use natural gas. The main difference for these types of heaters is that with your traditional pool heaters, theyre actually actively producing heat to warm up your pool, which is why their output is measured by BTUs . Pool heat pumps on the other hand simply transfer the heat from the air to your water, so computations and numbers like BTUs can be a little bit off as it is directly affected by the temperature of the air. The colder the air surrounding your heat pump, the less heat is being transferred to the water and vice versa.

    Before we dive on to the details of how to properly size a pool heat pump, here’s our pool guru Tom with a quick overview of our best-selling pool heat pump, the Water TechniX Paradise Pool Heater!

    Benefits Of Calorex Heat Pumps

    POOL HEAT PUMP: How Does It Work & Is It Worth It? | Swim University

    Take a look at our product spotlights to learn more:

    C-PAC+ 6-8-12-15-20 Air source heat pump

    Unlike alternative ways of heating your pool, the C-PAC+ requires no fuel storage tank or high capacity electrical supply and produces no smells, fumes or CO2 gases.

    I-PAC+ 12-16-22-28 Inverter heat pump

    Inverter technology allows for efficient control of the pool temperature, and the I-PAC only uses what energy is needed when it is required. High efficiency with modulating step-less inverter compressor giving an average COP of 10.3.

    I-PAC 8-12-16-22 Inverter heat pump

    High efficiency with modulating step-less inverter compressor giving an average COP of 9.7.

    V-PAC 12-16-22 Inverter heat pump

    High efficiency with modulating step-less inverter compressor giving an average COP of 10.7.

    I-PAC 50-100BHC Inverter heat pump

    High efficiency with modulating step-less inverter compressor giving an average COP of 10.5 and 10.0 .

    I-PAC 50-100BLY Inverter heat pump

    High efficiency with modulating step-less inverter compressor giving an average COP of 10.5 and 10 .

    Read Also: How To Make An Underground Pool

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