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Air pressure difference between indoor and outdoor or staircase in multi-family buildings with exhaust ventilation system in Finland

机译：室内和室外或楼梯之间的空气压力差异在多户外建筑物，芬兰排气通风系统

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Pressure differences between outdoors and indoors influence indoor environmental quality (IEQ) and building physics of the building envelope. This paper focuses on measurements of pressure difference values of about 152 apartments from 26 multi-family buildings in Finland. Measured data include pressure differences between indoor spaces and both outdoors and staircases before and after renovation. In buildings equipped with mechanical exhaust, the pressure differences between indoors and outdoors before renovation varied from +10,1 to-95,0 Pa (average-7,8 Pa), and between indoors and staircases from-3,5 to-6,0 Pa (average-18,6 Pa), being lower than-5 Pa in 36% of the buildings. In naturally ventilated buildings, the pressure differences between indoors and outdoors were lower than-5 Pa in 44% of the buildings. The average pressure differences after renovation in nine buildings equipped with mechanical exhaust were slightly higher (-19,1 Pa against outdoor and-9,0 Pa against staircase). A possible reason for higher negative pressure could be that the airtightness of building was improved by renovation, but the ventilation system was not balanced accordingly. Improving energy efficiency (EE) could effect on pressure difference either positively or negatively. Measured pressure difference between indoors and outdoors or staircase before and after renovation could be a possible indicator when assessing the impacts of improving EE on IEQ and occupant satisfaction.
机译：室外和室内之间的压力差异影响室内环境质量（IEQ）和建筑信封的建筑物理。本文重点介绍芬兰26家多族大厦约152公寓的压力差值的测量。测量数据包括室内空间之间的压力差异，在户外和楼梯之前和之后进行翻新。在配备机械排气的建筑物中，翻新前的室内和户外之间的压力差异从+10,1至95,0 PA（平均-7,8 PA）而异，在室内和楼梯之间 - 3,5至6之间，0 pa（平均-18,6 pa），在36％的建筑物中低于-5 pa。在天然通风的建筑物中，室内和户外之间的压力差异在44％的建筑物中低于-5 pa。在配备有机械排气的九个建筑物中的整个压力差异略高（-19,1a，户外和9,0 pa逆楼梯）。更高负压的可能原因可能是通过改造来改善建筑的气密性，但通风系统不相应地平衡。提高能效（EE）可以对阳性或负面的压力差影响。在评估改善EE对IEQ和乘员满意度的影响时，在室内和户外或户外或楼梯之间的测量压力差可能是可能的指标。

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