Heating and ventilating buildings : a manual for heating engineers and architects . t and HEATING WITH HOT AIT!. 325 so as to enter the furnace either below or above the level ofthe floor, and to secure best results this box should open onthe windward side of the house so that the force of the windmay be utilized as far as possible in producing localities where the winds often vary in direction it is ad-visable to erect, when possible, two cold-air flues, so arrangedthat the one which produces best results can be used and theother closed off by a damper. The hot-air pipes are al
Heating and ventilating buildings : a manual for heating engineers and architects . t and HEATING WITH HOT AIT!. 325 so as to enter the furnace either below or above the level ofthe floor, and to secure best results this box should open onthe windward side of the house so that the force of the windmay be utilized as far as possible in producing localities where the winds often vary in direction it is ad-visable to erect, when possible, two cold-air flues, so arrangedthat the one which produces best results can be used and theother closed off by a damper. The hot-air pipes are almost universally taken off from thetop part of the hot-air chamber and at the same level, anderected without branches, so that we find as many pipes inuse as there are rooms to be heated. The usual arrangement of cold- and hot-air piping is shownin the accompanying Fig. 218. In this particular case thecold-air box is upon the floor, the furnace has a portablesetting, and the hot-air pipes are taken from the top of thehot-air chamber. In a few instances partitions or pipes in the. Fig. 218.—Elevation of Furnace hot-air chamber are arranged so that a definite area of thefurnace surface is used to warm the air for each hot-air pipe,it being expected to produce by such a construction a morepositive flow of air to the remote rooms. It is doubtful,however, if the heating is more reliable than that which canbe obtained with good proportions of parts when arranged inthe usual manner. In the opinion of the author the hot air could be distri-buted with much less friction were a system of main pipes 326 HEATING AND VENTILATING BUILDINGS. and branches employed as suggested in the diagram Fig. 219,which is taken from a magazine article published about ten yearsago. If the friction in the distributing-pipes could be entirely
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