What Size Pool Heater

We can help you determine the best size pool heater for you as a free service.

EITHER complete this online Pool Heating Assessment Form form

OR download this Pool Heating Assessment Form to complete and return to us by email or fax.

What determines the ideal pool heater size?

The desired pool swimming temperature for most people is 26 to 28 degrees C. The desired spa temperature is 36 to 38 degrees C. Water heated above 38 degrees C can breed harmful bacteria and may cause health problems.

Most pool owners in a domestic situation use their heaters intermittently. That is to say, the pool is allowed to cool when not in use and is heated for weekend use, parties or when the weather looks fine.

Spa pool heaters are only usually turned on when the owner requires using the spa.

In both these situations gas heaters are one of the most affective ways to guarantee comfortable water temperatures, regardless of weather conditions or the time of the year.

As a result of a gas heaters comparatively economical purchase price, it can be sized to heat a pool or spa rapidly, usually under 24 hours for a pool and under 1 hour for a spa.

This provides the pool owner the flexibility to turn the heater off when the pool is not being used, yet quickly bring the water up to temperature at short notice.

All other systems have a longer heat up time and therefore not always the best choice.

The major heat loss in a swimming pool is over the surface area of the pool.

Consideration is also given to the following:

Is the pool shaded
Is the pool in a high wind area
Does the pool have a blanket
Does the pool have a weir, water fall or fountain features
When sizing a pool or spa heater the above criteria is a huge factor.

The ambient temperature of the water also plays a huge part in assessing heater size.

The ambient temperature varies from areas in Australia but these temperatures are based on the coldest time of the year, example: Melbourne 8 degrees C – Sydney 10 degrees C – Brisbane 12 degrees C and so on.

When sizing the pool or spa heater the difference in the ambient temperature and the desired temperature is used.

Pool heater model numbers usually relate to the mega joule or kilowatt rating.

Example:

Gas heater model number (Raypak) PO430 nat. gas 420 mega joules of gas consumed in 1 hour
Gas heater model number (Astral) MX300 nat. gas 295 mega joules of gas consumed in 1 hour
In all instances whether it be a domestic or commercial pool heater application we can size and give approximate running costs and a competitive heater cost as a free service.

EITHER complete this online Pool Heating Assessment Form form

OR download this Pool Heating Assessment Form to complete and return to us by email or fax