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Heat transfer can never be stopped, it can only be slowed or reflect away. The purpose of insulation is to impede this natural process. In hot weather, you want to stop heat from being transferred into the building, and in cold weather you want to stop it from being transferred out.
How Insulation Prevents Heat Transfer. Learn how insulation works to slow the movement of hot air. Discover how insulation can help stop three different types of heat transfer: conduction, convection and radiation.onvection is the transfer of heat through liquids or gases. 1  Example: When cold air enters your home, it mixes with warm air. 2  Heat energy is transferred to the cooler air, and the overall temperature of the room is lowered. 3  Result: More energy is required to replace the heat transferred to the cooler air.