Design of ventilation systems in low infiltration detached house.

The air-tightness of various houses is revealed by testing with the pressurization method, and the equivalent open area of air infiltration per floor area is proposed as the index of air-tightness of a house.< Then the heating system, indoor air quality, indoor temperature and humidity and house planning which affect the ventilation design are discussed in connection with the air-tightness of a house. It is also stressed that in the low infiltration house, the outdoor air should be surely taken in and the polluted indoor air should be surely exhausted to outside.< Lastly the ventilation systems are ranked corresponding to the graded equivalent open area and the graded heating system.