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From the 3-liter house to the zero-heating cost house
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The Info Box
The 3-liter house pilot project: Luwoge launched its 3-liter house pilot project in Ludwigshafen's Brunck Quarter in 2001, by modernizing a building from the 1950s into a low-energy house. It achieved this by means of comprehensive thermal insulation with Neopor®, triple-glazed windows, a controlled ventilation system with 85-percent thermal recovery, and the latent heat storer Micronal® PCM. Integrated into gypsum boards or wall plaster, latent heat storers absorb heat during the day to keep the apartment cool on hot summer days. The 3-liter house has since attracted considerable attention and emulation worldwide, and its energy values have even exceeded expectations. Average consumption in the 3-liter house is 2.6 liters of heating oil per square meter per year.
Interior insulation for modernizing old buildings: Even buildings more than a century old need not continue to waste energy, as Luwoge showed by modernizing an old residential house in 2005. Built in 1892, this duplex in the BASF employee housing district known as the Alte Kolonie now consumes only 6 liters of heating oil per square meter per year. Superior thermal protection measures were used to lower energy needs, with a new generation of Neopor® plasterboard panels as interior insulation.
New 1-liter row houses: Luwoge has built 46 new row houses in the Brunck Quarter of Ludwigshafen. Here, too, the key to their energy efficiency lies in comprehensive thermal insulation. Neopor® panels up to 60 centimeters thick and triple-glazed windows filled with inert gas ensure that no heat is wasted. In addition a controlled ventilation system with thermal recovery is needed to achieve this. A small block-type thermal power generator covers any additional heating needs for all 46 units, and provides the 1-liter house with electricity and hot water.
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