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Steve Byers (cq) uses a Blower Door during his energy efficient house testing for the Environmental Protection Agency on Tuesday morning, August 1, 2006 in the 8100 block of East 29th Ave. at Stapleton in Denver. Byers does testing for the EPA and the Blo

Steve Byers (cq) uses a Blower Door during his energy efficient house testing for the Environmental Protection Agency on Tuesday morning, August 1, 2006 in the 8100 block of East 29th Ave. at Stapleton in Denver. Byers does testing for the EPA and the Blo