Duct Sizer Mcquay -

"It'll work," Clark said, handing the paper back. "Clean up your layer management next time."

McQuay SWP (Single Wall Plenum) fan coil delivers 2,500 CFM. duct sizer mcquay

| Best Practice | Common Mistake | |---------------|----------------| | Always use actual airflow (including diversity factor). | Using fan nameplate CFM without diversity. | | Design return ducts larger (lower friction) than supply. | Sizing return identical to supply. | | Convert round to rectangular maintaining aspect ratio ≤4:1. | Using very flat ducts (high friction). | | Verify velocity at terminal (VAV box inlet) per McQuay catalog. | Ignoring terminal inlet velocity limits. | "It'll work," Clark said, handing the paper back

Suddenly, he remembered an old trick his mentor, 'Old Man' Miller, had taught him. “Don’t just look at the duct, look at the fittings.” | Using fan nameplate CFM without diversity

The resistance the air encounters. Higher friction requires more powerful fans.