=+6-4.

Using the crack method, compute the infiltration for a swinging door that is used occasionally.

assuming it is

(a) tight-fitting.

(b) average-fitting, and

(c) loose-fitting. The door has dimen-

sions of 0.9 x 2.0 m and is on the windward side of a house exposed to a 13 m/s wind. Neglect internal pressurization and stack effect. If the door is on a bank in Rapid City, SD, what is the resulting heating load due to the door for each of the fitting classifications?