Edit: meant to put 3-4 minutes not 3/4
In: Engineering
Heating a space (car, room, office etc) relies on air flowing past something hot.
In cars, it is the water that cools the engine that the air must flow past to heat the cabin space. Think how long it takes to boil a kettle. With a fan behind the kettle, the air flowing past the kettle will be cold to start off with, getting warmer as the water heats up.
With a space heater, an area inside the heater is heated up instantly, think like a toaster element. So a fan placed behind a toaster will blow heated air straight away.
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