Exterior – Roof & HVAC Penetrations

• Seal all plumbing vent penetrations
• Fan Removal – If possible, remove curb mounted exhaust fan and seal with plastic/visqueen to be airtight.
• RTUs & Makeup Air Units – Turned off at the disconnect on roof to ensure economizers are closed.
• Barometric Relief/Dampers – Ensure all barometric relief dampers are secured closed or sealed.
• Condensate Drains – Ensure p-traps on condensate drains are filled with water or temporarily sealed.

Interior – Plumbing, Exhaust Fans, Windows, and Doors

• P-Traps – Fill all plumbing P-traps (sinks, floor drains) with water to block airflow from the sewer system.
• All interior doors to be left open
• All exhaust fans turned off (motion activated fans need to be disabled/breaker turned off).
• Ensure all windows and exterior doors are fully closed, latched, and locked during testing.
• At pre-determined testing doors, please remove closing mechanisms that sit inside the frame.
• Threshold & Weather stripping Installed on exterior doors.
• Combustions gas appliances turned to the “OFF” position
• Ensure the slab/subfloor is caulked to the sill/base plate.