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Infiltration - Heat Losses from Buildings

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Estimated heat loss from 

  1. Offices, apartments, hotels ...
  2. Entrance halls, vestibules ...
  3. Industrial buildings ...
  4. Houses ..
  5. Public buildings ..

by infiltration:

Infiltration rates through various Types of Wall Constructions

Infiltrationrates through Walls
Wall TypeInfiltration Rates (cu.ft per foot of crack per hr.)
Wind Velocity (mph)
Frame Wall with lath and plaster or wallboard 0.03 0.07 0.13 0.18 0.23 0.26
Brick Wall, 8 1/2" plain 2 4 8 12 19 23
Brick Wall, 8 1/2" plain with plaster or wallboard 0.02 0.04 0.07 0.11 0.16 0.24
Brick Wall, 13" plain 1 4 7 12 16 21
Brick Wall, 13" plain with plaster or wallboard 0.01 0.01 0.03 0.04 0.07 0.10
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