no prob. it is specifies the standard for pressure differential systems to prevent the smoke, during fire, from entering critical spaces. usually, these critical spaces are stairwells which are used as means of escape during fire.
the only manufacturer that i found with a datasheet for the said power mosfet is hitachi. unfortunately, they don't have a spice model for that.
i'll just spend my time making my own model. by the way, does all kinds of mosfets share the same code for the spice model? thanks.
construction standards may also be used as a reference. they have an approximate measurement on leakage areas based on the type or quality of construction of the building, or room for the case of enmuaxuan. try british standards, specifically BS EN 12101-6:2005. the equation i have given you...
Use Q = 0.83AP^-n, where Q = net flow rate, A = effective area of leakage, P = differential pressure, and n = 1 to 2 (1.6 for cracks around windows, 2 for large openings such as doors and windows).