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At the Hackley School, Tarrytown, N.Y., Goodhue Memorial Hall’s Sternberg Library has an average R-value of R48 for the roof and walls. This represents a high resistance to heat transfer. The high R-value combined with a geothermal heating and cooling system and high thermal mass within the conditioned space produces an extremely energy-efficient building—a Thermos bottle effect. Photo by Robert Mintzes

Making it Readable

Nov. 1, 2006

Peter Gisolfi