It is well-known that a building which is not insulated will lose heat quite fast, regardless of the implemented heating system. As a consequence, there are frequent variations in temperature that cause heat discomfort and also increase the value of the energy bills.
The ceiling is responsible for most of the heat loss (35%); up to 25% of the heat is lost through the walls, 20% through the floor, 20% through the windows and another 25% is caused by the air flow. Heat tends to migrate to colder areas, through uninsulated surfaces; this way, the temperature inside the house decreases while the heating demand increases.
If we look comparatively at two houses – one insulated and the other one uninsulated – photographed with a thermal camera, we will easily notice the difference. The uninsulated house will be colored in shades of red-orange- yellow, a sign that the heat is leaking. On the other hand, a properly insulated house will be colored in blue, which means that the heat stays in, hence the heat consumption is reduced and so is the amount of money paid for heating.
To keep the heat inside the house during the winter, we have to work on the following aspects:
- adding adequate and efficient insulation
- preventing the penetration of cold air flow inside the house
- choosing correctly the size and type of the windows
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