Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 52
enerally made of matched boards; butgalvanized iron is much lietter; it costs more than wood, but is wellworth the extra expense on account of tightness, which keeps the dustand ashes from being drawn into the furnace casinj? to be dischar<redthrough the registers into the rooms above. The… … be smaller than the in-side dimensions of thecold-air box. A door toadmit air from the cellarto the cold-air box isgenerally provided. Asa rule, air should betaken from this source,only when the house istemporarily unoccupiedor during high winds. Return Duct. Insome cases it is desirableto return…
Architecture · Building · Carpentry
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