Projektering av ett småhus med fördjupning i uppvärmningssystem
This report aims to examine the design of a passive house. The design addresses the selection ofmaterial, sizing and selection of both building services systems and building technical features suchas load-bearing framework and moisture control. Interior layout is designed for a family of twoadults and one child.A big part of the report is devoted to an in-depth comparison of three different wall constructions ofpassive house standard. The structures that have been compared are a lightweight timber structure, aheavier concrete structure and a sandwich wall of the brand Weber Leca. The report covers variousaspects such as air flow, wall thickness, the risks associated with the construction, U-value, thermalbridges, power consumption, price, and assembly costs. The purpose is to decide what kind of wallthat would be the best option for the house. To give a satisfactory answer to this, two otherquestions first needed to be answered;"what is a passive house?" and "what is the difference between a passiveand an ordinary house?".It doesn´t exist a clear definition of what a passive house is, however,Forum för energieffektiva byggnader(roughly translated in tothe Forum for energy efficient buildings, referred to in the text as: FEBY) hasdeveloped a specification for low energy houses. The specification contains specific numbers on howmuch power and energy a house can consume and still be called a passive house. The maindifference between an ordinary house, and a passive house turned out to be precisely those numbers.It is worth noting that no specific requirements, except requirements for U-values of windows, isrequired by the design itself to be called a passive house as long as you meet the energy and powerspecification (Erlandsson et al., 2009).The final analysis for the three wall structures were made using a weighting table and the result wasthat the concrete wall was the best suited for this purpose. When the house was planned with thiswall structure it manage to accomplish the FEBY requirements that have been addressed in thisreport and thus can be presented as "projected for Passive Houses accorded to FEBY" (Erlandssonet al., 2009).