Blower door testing with exterior vents sealed or unsealed? – GreenBuildingAdvisor

Should all exterior openings be sealed or open during a blower door test?

When my GC did the first test (they had their own staff do the test) it was before drywall but all the exterior vents were sealed shut with Rissan tape. Now they want to do the final test but we still have the intake and exhaust air openings taped over and without the proper exterior hoods yet. They have scheduled it for this week but I’m not so sure.

I think it is pretty misleading to say a house is ___ ACH50 when the large holes the HVAC are sealed shut. As soon as the HVAC is completed with the exterior hoods and dampers, those openings will not be covered with Rissan tape so I don’t understand why they would be during the test.

Just curious what is standard practice, I’m not sure if it is unreasonable to tell my GC to reschedule the testing once exterior vents are unsealed.