Building services systems with dwelling ventilation

The investigation of the QHA (quality community timber construction anddevelopment, registered association) compare and evaluate by the example of a builtreference house the energetic and economic efficiency of current building servicessystems with dwelling ventilation. As basis serve gas condensing boiler technology,heat pump and pellet plants, combined with dwelling ventilation systems with/withoutheat recovery and solar plants. The results shown and comparative representationswere determined in the first half of 2006.The reference house is a detached house without basement in timber frameconstruction with 156 m2 living space. In the year 2001 it was planned and builtaccording to the requirements of the at that time valid thermal protection regulationand fulfills the today valid requirements of the EnEV 2002. Energetic and staticcriteria form the basis with the construction of the building envelope withconsideration 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 (goodinsulation standard like e.g. with the reference house) and an energy-efficientbuilding services system. The consumption costs are most favorable incomparison to the expenditure. The higher investments keep within a limit andare relativised in the monthly expenditures concerning the long-term financing.- with good financial possibilities: for the today's owner generation the detachedhouse is an economic good and at the selling in for example 10 to 15 yearsstands in competition with the building standards offered then at the market.and becomes increasing. Thus: existing building standard after KfW 60 (and/orKfW 40) with appropriate house technology.Modern building services combinations (in connection with dwelling ventilationtechnology and heat recovery) more strongly affect the compliance of thedemanded maximum values concerning primary energy consumption and in thecenter of attention for the owners the consumption costs, than widely assumed.