Assertion: revolving door | /r/CapableOf | replace swing doors
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text: When revolving doors replace swing doors, they can save up to 30 percent in energy costs, or as Rockefeller University explains, “267 BTUs of heat energy, roughly equivalent to 1.3 hours of light from an incandescent lamp, 4.3 hours of light from a compact fluorescent bulb or .06 miles of fuel for an automobile.