San Francisco : Architect and Engineer, Inc · leaf 133
ured by the AMERICAN AIR FILTER COM-PANY, 125 Central Avenue, Louis-ville, Kentucky. The arrestance rating, whentested by the Discoloration Methodat the normal velocity of 35 f.p.m.end standard rating of 1,000 c.f.m.per standard-sized 24 by 24unit, is 90 per cent or better withatmospheric dust or… … moisture invasion Moisture molecules move with relentless action from hot to cold areas.These massed forces of vapor surround refrigerated rooms and con-stantly work toward penetrating the cold interior. They pass throughwarm walls and make insulation wet, soggy and valueless. Thats why BROWNSKIN…
Architecture · Building
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