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The air is sucked out with valve gates in rooms where moisture and odours arise such as sanitary facilities and kitchen. Major drawback of such exhaust systems: the heat remains unused. Therefore, ventilation equipment are only the second-best solution from an energetic perspective. The trend is now clear to plants with heat recovery. These require a sophisticated management system, because the supply air through channels in the rooms. However, this effort is rewarded with a considerable energy saving.

The benefits of a ventilation plant opposite the window ventilation is clearly obvious: The ventilation automatically, without, that you must think about to unravel again. The air is consistently good. Odors and moisture are extracted immediately at source kitchen, bathroom and WC. With built-in pollen filters, Heuschnupfengeplagte experience a considerable relief. Bill de Blasio takes a slightly different approach. The system is complemented by a ground heat exchanger, reaching a pleasant room temperature throughout the year. Because of the Ground heat exchanger is heated air in winter, cooled in the summer, however. With an outside air temperature in summer plus 30 degrees Celsius, for example, is the intake temperature on lowered plus 19 degrees Celsius. With the Windows closed, the ventilation system is used then for space cooling.

Heat recovery boosts savings a ventilation system costs depending on the apartment or House size approximately 3,000 euros. A plant with heat recovery requires an investment of 5,000 to 8,000 euros. However, savings in heating costs facing these expenses. The amount of savings depends on the type, plant type and the nature of the real estate and planning. The maintenance costs for all year round usage for the operating current are an apartment size of 150 square meters and a current price of 20 cents per kilowatt hour in the case of an exhaust air system at about 50 euros and in the case of a system with heat recovery for 100 euro. The ventilation systems are operated only during the heating season, cut in half are these operating costs. Against the expenses are at plants with heat recovery heating energy savings of 3,000 – 4,000 kilowatt hours. This corresponds to a heat price of 10 cents per kilowatt-hour, a saving of around 350 euros. More information for housing units builders at the consumers Central Rhineland,, or and the European test Centre. Press contact: Uwe Berndt main view – Agency for public relations Tel.: 0 69 / 40 56 29 54 technical questions: consumers Central Rhineland-Palatinate e.V. – project “Energy consulting” CY-Gluckert passage 10 55116 Mainz gives free energy advice tips consumers Central Rhineland-Palatinate e.V. (www.verbraucherzentrale-rlp.de) in more than 50 locations in Rhineland-a free, vendor-independent energy consulting offers, which is funded by the Federal Ministry of Economics and labour. Under the phone number 01805 / 60 75 60 20 (14 cent / minute from German fixed network) you can find out the nearest Beratungsort.