The Garden Guide

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

Brick-built flues for hothouses

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2112. The best sort of flues, after all that has been said on the subject, is, in our opinion, the common form, built of thin well-burned bricks neatly joined, with the bottom and top of tiles, and no plaster used either inside or outside. Where only one course of a flue can be admitted, the broader it is the more heat will be given out as it proceeds, and, as a consequence, one extremity of the space to be heated will be hotter than the other; a return or double course of a narrow flue is, therefore, almost always preferable to one course of a broad flue.