Climate optimization of a single-family house with a solid wooden frame

The climate crisis is becoming more prominent in everyday life and the construction industry plays a significant role. The study aims to optimize the climate of a fictional house with exterior walls made of wood. By investigating the climate impact of a building with a solid wooden frame depending on the heating system. The study will focus on two different frame systems, one of which is made of cross-glued wood and one of IsoTimber. The questions are what climate impact a solid wood building does have. What dimension of cross-glued wood is required to meet BBR's requirements? Which combination of frame system and heating system is the most optimal for Malmö and Stockholm? How many years does it take for the heating to have a greater climate impact than the manufacture of the building? How much climate impact will the most optimized building have after 50 years? In the VIP-Energy program, energy calculations have been performed. Quantity and energy calculations have then been translated into carbon dioxide equivalents in the BM program to calculate the climate impact for the buildings with associated heating systems. The results show that cross-glued wood has a lower general climate impact than the frame of IsoTimber. The dimension for meeting BBR's energy requirements with a cross-glued wood frame is 330 mm. The most optimized combination of frame system and heating from a climate point of view is IsoTimber 300 mm with district heating for Malmö and Stockholm. The results show that energy consumption from heating will have a greater climate impact than production for the most optimized alternative only after 22 years for Malmö and 44 years for Stockholm. The building with the least climate impact after 50 years is IsoTimber 300 mm with district heating where the climate impact is 57,7 ton CO2e in Malmö and 43,7 ton CO2e in Stockholm. The study shows that reliable conversion factors are required to translate components and heating systems into carbon dioxide equivalents. The current conversion factor for heating when district heating is used differs between the climate zones, which means that the result is widely distributed. The best optimized alternative, 300 mm IsoTimber with district heating is a good alternative with a low climate impact that still maintains a high level of comfort for the user