The exhaust goes thru the roof, and with the snow we are having today, I'm
not going up on the roof to inspect the louvers. BEsides we do use the fan
a few times every week so closing off the outside is not an option,
I do have a piece of thin plastic inserted between the filter and the frame
, and it has stopped the leakage for the most part ~95% or so. I was just
hoping to find aomething a little more "professional" to do the job. SWMBO
likes factory-built things whenever possible, not kluges that I make up, ev
en when they do look good.