Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 168
ed with a perforated pipe or duct discharging heated air abovethe fire to make the combustion more complete and thus diminish theamount of smoke given off. This arrangement is of somewhat doubt-ful utility, since it is difficult to heat the air properly, and to regulateits admission. It is… … 15 O O t-« oi r<3 STEAM AXD HOT WATER FITTING 5 . down-draft principle, the air being drawn down through the fire in-stead of passing upward in the usual manner. Coke Boilers. Coke is a popular fuel in some parts of the coun-
Architecture · Building · Carpentry
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