Home › Forums › Commercial › At what diff pressure is this Infil Rate to be measured/defined? Tagged: blower door, infiltration This topic contains 0 replies, has 1 voice, and was last updated by Ryan Moore 11 months, 1 week ago. Author Posts January 4, 2017 at 8:32 am #6805 Ryan MooreKeymaster It’s based on 50 pascal (0.2 in. wc), the norminal delta pressure for blower door test. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.