First off, thanks to those who gave advice on an earlier thread re: how to actually get my new 6040N Chinese laser into the basement as it wouldn't fit through the doors.
Now that I solved that problem I have another question. The ducting for the laser to the blower and out from the blower to the wall is 6" not the 4" I was expecting. Not a problem, except I have to put a vent cap on the outside wall and we have mice in the area where I live. This means I have to have a pest guard on that vent cap. The challenge is that all the vent caps with pest guards are 4" not 6". they don't make 6" ones with pest guards. Don't ask me why.
So, my two choices are 1) make a makeshift pest guard for a 6" vent cap, which might be fine or 2) get a reducer and reduce the ducting some point before the wall from 6" to 4" so I can use the standard 4" caps with guards, which is easy to do.
My question is two-fold. First, will it make a real difference to anything if I reduce the ducting down and second, if so (or I guess, even if not) where should I be reducing, from the laser to the blower, somewhere along that ducting, or from the blower to the wall?
Any thoughts?