Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 572
Fig. 2, DIRECT CONNECTED STEEL PLATEFAN, DRAWING THROUGH COILS Fig. 3. FAN WHEEL WITH STRAIGHT BLADES manner in which the heated air is introduced into the room causes a pressure whichforces the foul air out through ducts leading to the outside atmosphere, which gives Continued on Next Page ANDREWS…
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