draught excluder - It reduces warm air that leaves the house through gaps. , carpet - The material has air trapped between the fibres which reduces heat loss through the floor, loft insulation - The fibres of the material trap air, making it hard for heat to be lost through the roof, curtains - The movement of warm air from the room to the window is reduced., cavity wall insulation - The material contains pockets of trapped air which reduces conduction. Stops energy transfer through the walls, double glazing - Gas is trapped between two layers of glass which reduces heat loss through the window, silver foil - It reflects thermal energy back into the building.,

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