Departed is a different air permeability through the windows or exterior doors.
To function effectively, stack ventilation, air infiltration must occur (Assuming there are no air vents inside the home).
widely prevailing belief that the windows and doors must be as tight is wrong. Lack of fresh air in the building, causing mold and mildew, the accumulation of human exhaled carbon monoxide (at high concentrations resulting in lower concentration, drowsiness and malaise), and above all does not supply necessary for combustion in stoves or ovens oxygen.
PN-91/B-02020 Polish Standard requires that the air infiltration of windows and doors in residential buildings newly erected ranged from 0.5 to 1.0 m3 / (m * h * daPa2 / 3).
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