Turn the heaters on just prior to heating requirements. Periodic cleaning of the reflectors and heat source replacement is all that will be required. There are no by-products of combustion as with fossil fuel burning units. Electric infrared adds nothing to the air nor takes anything from it. To best understand infrared heating, a comparison with different methods of heat transfer should first be considered.
Heated air is circulated by fans or blowers to generally surround a normally enclosed area.
The perfect example of electromagnetic infrared energy is heat from the sun. A fire place is a more familiar form of radiant heat.