Table of ContentsConvective and Conductive Heat LossRadiative Heat LossConductive Heat LossAttic Insulation"Say No to Plagiarism. Get a Custom Essay on"Why Violent Video Games should not be prohibited"?Get the original essay Cavity wall insulation is a method used to reduce heat loss through walls by filling the air space with a material that inhibits heat transfer. Cavity walls are built in houses. These are an exterior wall and an interior wall that is airtight. This is known to be an effective way to prevent the wall. inside the house from becoming damp, but the air gap can transfer heat by convection, making the house colder. Heat loss through the walls can be reduced by using cavity wall insulation. Cavity wall insulation fills the space between walls with polymer foam, which reduces heat loss through conduction. Foam is a plastic material that traps air inside. The foam replaces the air in the space between the bricks. The foam also prevents air from circulating inside the cavity, reducing heat loss through convection. This involves blowing an insulating material into the space between the brick and the interior wall, which reduces heat loss through conduction. The material also prevents air from circulating inside the cavity, reducing heat loss through convection. This results in poor heat transfer by conduction because the polymer and trapped air are good insulators. The room in the house stays warmer for longer. Radiation Heat Loss Double-glazed windows with two layers of glass separated by a gap are designed to reduce heat loss and exclude noise. The layers of glass plus a small air or gas-filled space between them are called double glazing. The windows are sealed at low pressure and the air is dried to prevent fogging of the component. The air trapped inside the window acts as an insulator and does not prevent heat loss from being conducted from the interior glass plane to the exterior glass plane but reduces it by a significant percentage. As the air gap is very narrow, air cannot flow freely and thus also reduces heat loss by convection. Radiant heat loss is simply reduced by efficient double glazing. It has been found that almost 54 to 64 percent of total heat loss can be reduced with effective double glazing. Conduction Heat Loss The air trapped in the space is an insulator - it doesn't stop heat from being conducted from the inner pane to the outer pane - but it greatly slows the transfer of heat by downward conduction ! The air gap is too narrow to allow air to flow easily. This therefore reduces the rate of heat transfer by convection. The trapped air reduces the rate of heat loss through the window by conduction and convection. The room in the house therefore stays warmer for longer, thus reducing heating costs. Heat radiates through the air and the glass - in doing so, some is reflected (but that's pretty much the same as single glazing) and some is absorbed (mainly by the glass itself), which percentage increases as there is more glass. But the overall heat transfer by radiation is hardly modified by the double glazing of a window: it is the conduction and convection which change the most! Attic Insulation The space between the roof and the ceiling is called the attic. Fiberglass or others"