Building services systems with dwelling ventilation

The investigation of the QHA (quality community timber construction and development, registered association) compare and evaluate by the example of a built reference house the energetic and economic efficiency of current building services systems with dwelling ventilation. As basis serve gas condensing boiler technology, heat pump and pellet plants, combined with dwelling ventilation systems with/without heat recovery and solar plants. The results shown and comparative representations were determined in the first half of 2006.The reference house is a detached house without basement in timber frame construction with 156 m2 living space. In the year 2001 it was planned and built according to the requirements of the at that time valid thermal protection regulation and fulfills the today valid requirements of the EnEV 2002. Energetic and static criteria form the basis with the construction of the building envelope with consideration to an economic production and assembly of the house. Result and what is recommendable for the builder-owner?- with normal financing possibilities: building standards after EnEV (good insulation standard like e.g. with the reference house) and an energy-efficient building services system. The consumption costs are most favorable in comparison to the expenditure. The higher investments keep within a limit and are relativised in the monthly expenditures concerning the long-term financing.- with good financial possibilities: for the today's owner generation the detached house is an economic good and at the selling in for example 10 to 15 years stands in competition with the building standards offered then at the market. and becomes increasing. Thus: existing building standard after KfW 60 (and/or KfW 40) with appropriate house technology. Modern building services combinations (in connection with dwelling ventilation technology and heat recovery) more strongly affect the compliance of the demanded maximum values concerning primary energy consumption and in the center of attention for the owners the consumption costs, than widely assumed.