Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 124
Fig. 69. Aspirating Coil Placed in Flue to Prevent Down Drafts. 1,300 -^ 4 = 325 feet per minute = Velocity through the flue.Looking in Table XXIV, and following along the line opposite a30-foot flue, we find that to obtain this velocity there must be a difler-ence of 30 degrees between the air in…
Architecture · Building · Carpentry
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