Choosing the right pool heater can be tricky as there are numerous factors to take into account. This article offers some guidance and a simple formula.

1. Exactly What Capacity Pool Heating Unit Do I Need?
An unheated pool is just able to be made use of when the climate is
appropriate, so your utilization of your pool could be greatly raised by
getting a swimming pool heater. Swimming pool heating units are readily
available from numerous manufacturers and also in a selection of power
capacities, which means that selecting the right one for you is hard.
Swimming pool heating units can be found in a selection of power
capacities and you must carefully select the right one for your pool. Whilst
it is not too difficult to determine the dimension of the pool, there are
other variables which must be considered which are a lot more difficult to
be specific about.
Heater capacity is stated in BTUs per hr. As an example the Hayward H
Series of gas heaters ranges from 150 to 400k similarly Hayward Heat
Pumps range from 50 to 140k. (A BTU is the heat energy required to
increase the temp of one lb of water by 1 degree Fahrenheit.) Larger
heating units often tend to be somewhat more efficient but there is no
reason to pay even more than you need to.
The following should be taken into account when sizing a swimming pool
heating unit:
• Swimming pool dimension - The area of the pool area and also the
volume of water to be heated.
• How you will use the pool? - Will you be heating up the pool
continuously or, for example, merely at weekends? If you are
heating up the pool intermittently it means you will certainly want a
larger capacity heating unit than if you are heating up the pool
continuously.
• Temperature boost wanted - Exactly what temperature do you want
the water to be heated to and also exactly what is the air temp in
the coldest month during which you will be heating up the pool?
• Sort of location of pool - Is the pool in a protected or windy site?
Wind is a huge adversary of heated swimming pools since it boosts
evaporation and as a result temperature reduction. The pool really
should be sheltered from the wind if at all feasible.
• Will you apply a swimming pool cover? - Swimming pools that are
not covered can easily lose 4 ° F to 5° F over night in many places.
Using a cover, you can easily reduce that heat energy reduction by
FIFTY % or more.
Assuming average location factors, a general indication of the
requirements for a swimming pool heating unit may be determined using
the formula below:
Swimming pool area (in square feet) x Temperature climb wanted
(in the coldest month) x 12
Nevertheless no simple calculation is able to take into consideration

2. individual location and usage factors. As a general guideline, you are
recommended to go for a somewhat more powerful heater than you seem
to need. It will warm up the water more swiftly and with reduced stress
on its mechanism, which should help it last much longer.