Sunday, September 11, 2011

Heating with sun and body heat

Do nothing and still save money? Who realized his dream of home ownership as a passive house may not claim this formula for its heating bills. A mere 15 kilowatt-hours may consume such a building per square meter per year. This is possible only with an excellent thermal insulation. And that begins with the insulation of the floor plate. The XPS insulation holds in this field of application of the building weight and the moisture from the soil was playing while making the necessary reliable, high insulation values.

A passive house is designed so that it can do without a heater. Even in freezing temperatures prevail in the interior of the room a pleasant temperature. The heat comes from the sun, whose rays reach south-facing windows in the house, the waste heat from electrical appliances and the body heat of the residents.Compared to conventional heating systems is the amount of heat, of course, very low. The heat is thus a valuable asset, which needs to be kept inside the house. Triple-glazed windows, a ventilation system, which preheats the fresh air, and the perfect insulation of the building envelope are the barriers that prevent the loss of energy. The insulation thicknesses are from 25 to 40 centimeters - whether on the roof, wall or under the floor slab. The principles of the Passive House Institute (PHI) to see for all non-transparent parts of a building envelope thermal transmittance (U value) of less than 0.15 W / (m² K). When used under the floor slab, the material must bring more than excellent insulation properties.
The XPS insulation is made of the plastic polystyrene, which in a special production process - is first heated and then use a slot die, foamed - extrusion.In this way the material is a closed cell structure. It is therefore very stable under pressure and holds loads of up to 30 tons per square meter - more than enough for the load of a building. Moreover, XPS can not absorb water and is impervious to moisture. XPS is the strong foundation for heating costs 

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