Cyclopedia of heating, plumbing and sanitation; a complete reference work . f covered, as itshould be in practice. Having seen that the flow in the main riserdepends upon the elevation of the radiators, it is easy to see that theway in which it is distributed on the different floors must be con-sidered. For example, in B, Fig. 105, there will be a more rapidflow through the riser with the radiators as shown, than there wouldbe if they were reversed and the largest one were placed upon the firstfloor. We get the average elevation of the system by multiplying thesquare feet of radiation on each
Cyclopedia of heating, plumbing and sanitation; a complete reference work . f covered, as itshould be in practice. Having seen that the flow in the main riserdepends upon the elevation of the radiators, it is easy to see that theway in which it is distributed on the different floors must be con-sidered. For example, in B, Fig. 105, there will be a more rapidflow through the riser with the radiators as shown, than there wouldbe if they were reversed and the largest one were placed upon the firstfloor. We get the average elevation of the system by multiplying thesquare feet of radiation on each floor by the elevation above theheater, then adding these products together and dividing the sameby the total radiation in the whole system. In the case shown inB, the average elevation of the system would be (100 X 30) + (50 X 20) + (25 X 10) _ OA t .100 + 50 + 25 -^ieet; and we must proportion the main riser thejsame as though the wholeradiation were on the second floor. Looking in Table XXVII, wefind, for the second story, that a H-inch pipe will supply 140 square 122.
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