Heating and ventilating buildings : a manual for heating engineers and architects . Fig. 106.—Sectional-pipe Hot-water Radiator. 146 HE A TING A ND VEA 1 ILAl ING B UIL DI KG S. 68. Direct-indirect Radiators.—Radiators arranged witha damper under the base and located so that air from the out-. FlO. I07. — Radiator in Position. Fig. 10S.—Direct-indirect Radiator. side will pass over the heating surface before entering the roomare often used to improve the ventilation. The surface of theseradiators should be about 25 per cent greater than that of adirect radiator for heating the
Heating and ventilating buildings : a manual for heating engineers and architects . Fig. 106.—Sectional-pipe Hot-water Radiator. 146 HE A TING A ND VEA 1 ILAl ING B UIL DI KG S. 68. Direct-indirect Radiators.—Radiators arranged witha damper under the base and located so that air from the out-. FlO. I07. — Radiator in Position. Fig. 10S.—Direct-indirect Radiator. side will pass over the heating surface before entering the roomare often used to improve the ventilation. The surface of theseradiators should be about 25 per cent greater than that of adirect radiator for heating the same space. The styles andkinds either for steam or hot water are the same as the Indirect Heaters.—Radiators which are employedto heat the air of a room in a passage or flue which suppliesair are termed indirect. These heaters are made in variousforms, either of pipe arranged in return bend or in manifold coils,as in Fig. 93, or of cast-iron sections of various forms unitedin different ways. When cast-iron surfaces are used, they aregenerally covered with projections like the extended surfaceradiator. The sections, or, as they are sometimes called, thestacks for indirect heating, are usually held together by joints being formed by inserting packing between
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