G Series are hot air generators using LPG or natural gas.
They work by direct combustion and low pressure.
The hot air that is heated by thermal energy during the combustion is sent directly in the environment to be heated together with the products of combustion.
This allows to use fully the thermal power and to obtain the maximum efficiency.
The space has to be properly aired in order to maintain a correct air change.
The materials they are made of ensure that they are reliable and long lasting.