Warm Air Heating

Warm air heating systems provide large open spaces with heated warm air, the warm air is circulated by warm air convection currents, there is a risk that the warm air will stay at high level in a building structure due the heated air been less dense in volume than cooler air, cooler air can be said to be heavier than warm air , the warm air can be recirculated back to a lower level with recirculating fans called de stratification fans, which will switch on automatically has the temperature at high level increases past a pre set value.

Warm air system can be heated in different ways dependant on the design, cooler air will need to be past across a heat exchanger and increased in temperature, this can be achieved from a heating system this can be from a wet heat exchanger where hot water is passed through a pipe coil while the air flow passes across the heated coil.

This type of warm air system can also be in the form of a wall mounted fan convector or a duct mounted heater battery and centrifugal fan unit, with thermostatic controls.

Warm Air

Warm air heating is sometimes produced from a free standing or suspended cabinet heaters, this style of warm air heating can be gas fired or oil fired, the heat exchanger is heated with a gas or oil fired burner.

Like with a fan convector a fan unit will pass cool air across the heat exchanger to be heated and blown in to the building, the fan unit will also provide de-stratification by recirculating cooled air from the room and back to the heater to be reheated.