Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 242
TILATION 189 per cent could be transformed into electrical energy. In heatingwith steam, hot water, or hot air, the average amount utilized willprobably be about 60 per cent, so that the expense of electrical heatingis approximately from 12 to 15 times greater than by these methods. TEMPERATURE… … Fig. 136. G-eneral System of Wiring a House for Electric Heating. placed in the rooms to be regulated; and third, special diaphragm orpneumatic valves at the radiators. The air-compressor is usually operated by water-pressure insmall plants and by steam in larger ones; electricity is used in…
Architecture · Building · Carpentry
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