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How To Choose A Pool Heater So you have decided that you will get a lot more use out of your pool if you heat the water and are trying to decide what pool heater to buy. Pool heaters are available from several different manufacturers and in a range of power levels, which means that choosing the right one for you is not easy. A key factor to get right is the heating capacity which must match your pool itself and your use of it. This is not as easy as you might think because although it is easy to calculate the volume of water to be heated there are other factors involved which are harder to quantify. Heater capacity is quoted in BTUs per hour. For example the Raypak 2100 models range from 206 - 406k BTU and the Hayward H Series ranges from 150-400k but the Hayward H250 seems to be most popular. (1 BTU is the amount of energy required to raise the temperature of 1 lb of water by 1 degree Fahrenheit.) Larger heaters tend to be slightly more efficient but there is no point in paying more than you need to. The factors to take into account are: • •

Pool size - The volume of water in the pool and the surface area. Your usage of the pool - Will you be heating the pool constantly or, for instance, just a weekends? If you are heating the pool intermittently then you will need a larger heater than if you are heating the pool constantly. How many degrees do you need to increase the temperature. What temperature do you want the water to be heated to and what is the air temperature in the coldest month you will be heating the pool? How the pool is located - How exposed is the pool to the wind? Wind is a big enemy of heated pools because it increases evaporation and hence heat loss. The pool should be sheltered from the wind if at all possible. Will you use a pool cover? - Uncovered pools often lose four or five degrees during the night. Use of a pool cover will reduce that by about 50%.

Assuming average location factors, a general indication of the requirements for a pool heater can be calculated as follows: Pool area (sq. ft.) x Temperature rise needed (coldest month) x 12 Of course this cannot consider the specific factors of location and use of an individual pool.. So, as a general rule, you are best going for a somewhat more powerful heater than you seem to require. Playing safe like this also has the advantage that the heater should be working well within its capacity and therefore should last longer.

How To Choose A Pool Heater  

Useful information for anything thinking of purchasing a pool heater. For more information please visit

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