Post-occupancy evaluation of indoor environment and heating energyconsumption for passive houses in severe cold zone

In this paper, the post-occupancy evaluation of indoor environment and heating energy consumption for a passive house demonstration project in the severe cold zone is conducted and compared with ordinary houses located in the same community. The results show that the high-performance building envelope of passive houses can effectively increase the indoor operating temperature, and the indoor CO2concentration can be effectively diluted due to the mechanical ventilation system. In the heating season, the indoor PM2.5 concentration exceeds the standard in passive houses, and the filtration efficiency of the outdoor air system for fine particles does not meet the requirements. The actual heating energy consumption of passive houses is higher than the annual heating consumption index of ultra-low energy buildings with a deviation of 33.6%.