Mechanical Contracting & Plumbing January-December 1908 . / e S -4 S A ^^) Ptrvucr - e 9 MwcKwr Pec ot Chart VIII.—.Showing amount of hot water radiation required for inside temp., lio degrees Fahr.; outside, 10 below zero; water, 180 degrees. or 87 square feet of radiating surface tomaintain 65 degrees Fahrenheit with anoutside temperature of zero, where theroom has an outside wall exposure ofone side and not to exceed 20 per cent. 0 ... ... 70 .47 .437 .40 .364 0 ... ... 65 .427 .4 .353 .325 + 10 ... ... 70 .41 .38 .34 .317 + 10 ... ... 65 ..363 .32 .30 .275. n-f I I ^.5- I
Mechanical Contracting & Plumbing January-December 1908 . / e S -4 S A ^^) Ptrvucr - e 9 MwcKwr Pec ot Chart VIII.—.Showing amount of hot water radiation required for inside temp., lio degrees Fahr.; outside, 10 below zero; water, 180 degrees. or 87 square feet of radiating surface tomaintain 65 degrees Fahrenheit with anoutside temperature of zero, where theroom has an outside wall exposure ofone side and not to exceed 20 per cent. 0 ... ... 70 .47 .437 .40 .364 0 ... ... 65 .427 .4 .353 .325 + 10 ... ... 70 .41 .38 .34 .317 + 10 ... ... 65 ..363 .32 .30 .275. n-f I I ^.5- I / Z J S A Pec OT. Chart VII.—Showing amount of hot water radiation required for inside temp., 70 degrees Fahr.; outside, 10 below ^ero; water 180 degrees. the room of 4,000 cubic feat when thetemperature is z*ro outside, where theroom is square and has only one wallexposed and not to exceed one-fifth ofthis exposure is glass. This correspondspractically to a ratio of one .square foot of this exposure is glass surface, theadjoining rooms being heated to a likedegree. t—t Note 2—TTsinn the formula -— (T-t) The above is applicable to standardheight—(37 to 39 inches)—cast ironradiators, but with low radiators on ac-count of the higher co-efRcient of trans-mission the factors would be smaller,and with wall radiators still smaller,as has been noted. After reducing the glass and wall sur-face and the cubic contents to equival-ent glass surface, as has been noted,then multiplying the equivalent glass sur-face by the factors as above, acco
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