The Garden Guide

Book: Gardening Tools, Equipment and Buildings
Chapter: Chapter 6: Structures used in Gardening

Width of flues for hothouse furnaces

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2113. The size of flues is seldom less than 9 in. wide, by 14 in. or 18 in. high inside measure, which suits a furnace for good coal, whose floor or chamber is 2 ft. long, 18 in. wide, and 18 in. high. According as the object varies, so must the proportion both of furnaces and flues.