The cost of a missed blower door testing call is specific. The insulation crew finishes before anyone knows the house misses 3 ach50.
The caller had the volume, the target ACH50, and which house. A voicemail that says "call me back" drops all of it. They do not reconstruct the note for the company that failed to answer.
Energy-code weeks, when new houses need the number before the certificate makes the miss louder, because the next company that picks up takes the window. Daisy writes the volume, the target ACH50, and which house while the caller is still on the line, then a local company calls back with a real time.
The Blower CFM is the planning total, CFM50 the target implies. It does not bill anyone. It keeps the callback from starting at zero.
