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A History of Comfort with Low Technology
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20 per cent additional amount architectural attitudes average become boiler built capacity capita characteristic classroom collector complete components construction cooling cost developed ducts economic Edison effect efficiency elec electric heating electrical energy energy conservation energy savings ergy example facade figures fixtures floor fluorescent foot-candles fossil fuel glass greater growth heat pumps hot water Hudson River illumination increase industry installed lamps light levels Limits to Growth load materials mechanical megawatts Metula miles million billion needs nuclear office buildings operate over-all pattern performance pipe plants problem produce projections pumps reduced residential result schools sewage solar solar collector source energy space square feet square foot square mile standards structure surface temperature tion total energy tricity United usage utility ventilation visual wall waste heat World Trade Center York City