Design Procedures: Part 1
69
Figure 3.7
Pressure gradient in a high-rise building (stack effect).
Residential infiltration rates are often estimated on a building vol-
ume basis at 0.5 to 1.5 air changes per hour, depending on the tight-
ness of construction. While infiltration adds to heating and cooling
costs, a higher value may be preferable, since a too low ventilation
rate can result in excessive buildup of objectionable or even toxic gases
from carpets, wall coverings, and other elements within the building.
See Chapter 21, Indoor Air Quality.
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