Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 227
d into the coils and used for heating purposes. If spaceallows, the engine should always be belted to the fan. Where it isdirect-connected, as in Fig. 144, there is likely to be trouble fromnoise, as any slight looseness or pounding in the engine will be com-municated to the air-ducts, and the… … Fig. ]r>-i A (.oiimion Form of Fan Kngiiie. and protected from dust and grit. A liori/ontal engine for fan useis shown in Fig. 154. In case an engine is belted, the distance between the shafts ofthe fan and engine should not in general be much less than 10 feet 186
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