Energy Audit Vent Cover by AC Draftshield

AC DraftShield's Energy Audit Vent Covers save time, money, and waste during your energy auditing. The DraftShields have been independently tested and verified to seal in excess of 27 pascals for duct pressurization test and, as much as, 350 CFM during system run time. The DraftShield cover attaches in seconds, is reusable and will pay for itself in a few jobs.