Case study: Flexible, reliable HVAC system


A 60,000-sq-ft government administration building constructed during the mid-1950s, comprised of a basement and four floors, had two constant volume multi-zone dual-duct (MZ-DD) air handling units (AHUs) to provide both cooling and heating. The AHUs were located in separate mechanical rooms, one in the basement while the other was on the top floor.

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