I've been a builder for more than 40 years and never had tea that looks like the contents of a cassette toilet.We've had Sog Type B through the door for years.
For those times when we are parked close to anyone else I have a switch on the inside that turns the fan off.
For ease of emptying I always add a bio agent of one sort or another so all that comes out literally looks like builders tea!
I think the question has been answered re the 5mm but I think its to remind you, when you drill the door , to be sure to leave clearance betwen the door frame and the edge of the filter carrier
Mike S