Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 163
e governing the mat-ter, manufacturers vary-ing greatly in their prac-tice. The ratings men-tioned are given in thenumber of square feet ofdirect radiation the boileris rated to supply, withsteam at from 3 to 5pounds pressure whenthe radiators are sur-rounded by air at 70° F. Boilers similar, in… … 135 STEAM AND HOT WATER FITTING boilers have grates ranging generally from 18 inches to 30 inchesdiameter, and are rated from about oOO scjuare feet to 1,000 scjuare feet, or more. The boilers above described have the disadvantage of not beingcapable of having their grate surface increased by…
Architecture · Building · Carpentry
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