Heat escape routes Take a look at this diagram showing heat loss
from a house. Heat energy is transferred from homes through the
Examples of convective losses: cold air can enter the house
through gaps in doors and windows, and convection currents can
transfer heat energy in the loft to the roof tiles. Heat energy
also leaves the house by radiation through the walls, roof and
windows. Red shows where most heat is lost - through the windows
and roof Ways to reduce heat loss There are some simple ways to
reduce heat loss, including fitting carpets, curtains and
draught excluders. Heat loss through windows can be reduced
using double glazing. There may be air or a vacuum between the
two panes of glass. Air is a poor conductor of heat, while a
vacuum can only transfer heat energy by radiation. Heat loss
through walls can be reduced using cavity wall insulation. This
involves blowing insulating material into the gap between the
brick and the inside wall, which reduces the heat loss by
conduction. The material also