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Infiltration - Heat Loss from Buildings

Estimated infiltration heat loss 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:

heat loss from buildings by infiltration - chart

Infiltration rates through various Types of Wall Constructions

Infiltration Rates (cu.ft per foot of crack per hr.)
Wall TypeWind Velocity (mph)
51015202530
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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