RTU Supply and Return Transition Verification

Verify the unit opening, curb or adapter, airflow direction, access, and transition geometry before fabricating or forcing the duct connection.

Stop if

• I have the unit and curb openings at [dimensions]. Can we verify supply/return orientation and the approved transition before I send this to the shop?

Watch out

• Do not build from a generic unit footprint or swap openings because the duct lands easier that way.

Check

• Use the approved RTU and curb/adapter submittals
• Confirm supply versus return openings and unit orientation
• Measure actual curb and duct openings after setting when required
• Keep service panels, drains, economizer parts, and lifting points clear
• Confirm gasket, flex connector, insulation, and weather-seal scope

Steps

• Use the approved RTU and curb/adapter submittals
• Confirm supply versus return openings and unit orientation
• Measure actual curb and duct openings after setting when required
• Keep service panels, drains, economizer parts, and lifting points clear
• Confirm gasket, flex connector, insulation, and weather-seal scope

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