Much of the warm air generated by a hot shower is lost into the room. To minimize this effect, the shower was enclosed and a heat lamp was added. Heating air with a heat lamp takes far less energy than heating water. Also, the enclosed area quickly becomes saturated with humidity and the evaporative cooling is stopped. Keeping warm air inside the shower stall reduces the amount of hot water necessary for a comfortable shower. It also reduces the temperature needed to have a comfortable shower, and prevents the mirror from fogging.

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