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  1. breakingthescience

    IECC 403.5 - Economizers

    Hi all, I wanted to get some other opinions on the interpretation of the energy code economizer requirements. I am in Climate Zone 5, Chicagoland, for what its worth. IECC 403.5 requires economizers on systems over 54,000 btu/h cooling capacity. The second part of that requirement says "The...
  2. breakingthescience

    Air changes for heat removal - air compressor room

    I have a 600 sq.ft. room, x 15 ft high that houses three 75HP air compressors. In lieu of ducting each compressor individually, I'd like to provide a single exhaust fan on the roof, and interlock it with a louver on the exterior wall. Each compressor's internal air-cooled fan does 8,000 CFM...

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