1, building energy conservation must not damage the air quality, it is possible to limit the ventilation for energy conservation, but excessive reduction of ventilation will make indoor air quality decline, affecting the comfort of people's lives. Take energy conservation in the United States as an example, once reduced the ventilation volume from 25.5m3/h.p to 8.5m3/h.p, resulting in the spread of "closed building syndrome", the annual loss caused by the deterioration of indoor air quality reached 59 billion US dollars, and now the re-increased ventilation volume exceeds that before energy conservation, reaching 34m3/h.p
2, in the GB50096-1999 residential design planning 5.0 indoor environment clearly stipulates that the bedroom, the living room should have natural ventilation with direct circulation of outdoor air, even residential and bedroom in cold areas, the living room should also be equipped with a kitchen, the bathroom should be equipped with natural ventilation channels: In 6.0 construction equipment, it is expressly stipulated that the kitchen in cold areas, cold areas and hot summer and cold winter areas should be equipped with natural ventilation facilities for full exhaust in addition to exhaust machinery.
3, in China's building energy conservation "ninth Five-Year plan" and 2010 planning clearly wrote that the good sealing performance of the building, will bring the normal need for ventilation problems, can be used in the window (or wall) set ventilation cooling equipment micro ventilator to solve.
4, in October 2001 by the national housing and living environment engineering Center issued "healthy housing construction Technical points" on the indoor air environment made clear provisions as follows: living space should be able to natural ventilation, no ventilation dead Angle, a variety of different opening forms of Windows in different room location coordination, guide the wind road; During winter heating and summer air conditioning, there should be indoor fresh air exchange and supplementary equipment requiring sealed Windows to have a small amount of ventilation equipment, both to ensure indoor air health quality and energy saving.