Is a certification required to perform the pressure differential test? I'm wondering if it needs to be done by a specialty testing company or can it be done by the Mechanical Sub? This is for dedicated smoking units in a residential building using the door undercut method (no longer allowed in v4).
You rely on LEEDuser. Can we rely on you?
LEEDuser is supported by our premium members, not by advertisers.Go premium for $12.95 »