This Update is the first of two that discuss mechanical ventilation systems in houses. It explains why houses need to be mechanically ventilated, and examines the main characteristics of an ideal system from the standpoint of design and installation.
Current approach for design and installation of mechanical ventilation systems in houses is described in the framework of Canadian building codes and standards, which contain requirements about air change rates, air distribution, sound level, interference with other systems or building envelope.
A renovation of a dwelling stock in Slovak republic primary mission is a dwelling environment quality increase and dwelling houses essential operative energetical claims decrease. Considerable means of an operative energetical claims decrease of these buildings is their airiness reduction, that leads to an infiltration air change under level of sanitariness needful. A heat consumption for ventilation optimalisation beside a collateral dwelling environment quality increase is possible to reach through a controlled ventilation systems applications.
The occupants of six houses suffered from symptoms which improved upon leaving their houses. In a previous study, tests were conducted in these six houses to measure various physical parameters related to their indoor environments. Four of these houses were subsequently renovated to improve indoor air quality. Tests were repeated on the four houses to assess the effectiveness of the applied remedial measures.
The ventilation in Norwegian residences was studied with respect to the effect of new standards, construction techniques adopted, and energy conservation measures implemented This was compared to residential ventilation performance in other countries with a similar climate. The effective total air change rate (h-1) in 344 residences was measured with a passive tracer gas method known as the perfluorocarbon tracer gas method (PFT-method). The measurements were performed over a 14-day integrated sampling period.
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