1. Ensure that all temporary seals and covers for intentional openings such as at louvers, exhaust/intake vents, fireplaces, and rooftop units are properly sealed and not damaged or loosened during the construction.
2. Ensure that all plumbing-traps are filled with water.
3. Ensure that all operable windows, trickle-vents, and doors are properly shut and locked.
4. Ensure that all mechanical systems are shut-off and any mechanical dampers set to the closed position.

Diagnostic Evaluation

5. Identify locations with air leakage using infrared thermography or smoke pens in accordance with ASTM E1186-17, while the building is maintained at a minimum 25 Pa pressure (during pressurization) or –25 Pa (during depressurization). The following locations shall be evaluated:

1. The perimeter of windows and doors.
2. Around operable window hardware and door hardware
3. Penetrations through the roof, wall, and floor assemblies along the plane of the intended air-barrier.
4. Electrical outlets located on exterior-facing walls.
5. Lighting and other electrical penetrations through the roof level ceiling.
6. Above- and below-grade vestibules.
7. Stairs leading to unconditioned space.