Gas Heaters run using electricity, in conjunction with either natural gas or propane fuel.

The gas is burned in a combustion chamber, where the heat is transferred to the pool water using a heat exchanger.

The average gas heater lasts approximately 10-15 years.

Due to the extreme operating temperatures, regular maintenance by a licensed gas fitter is essential to ensure the heater runs efficiently and safely.

Depending on the size of the pool, a correctly sized gas heater can be expected to heat a minimum of 14 degrees on a standard domestic installation. 

The higher capacity of heater, the faster the temperature setting will be reached. For a spa, the heater size is dependant on the temperature rise requirement.