That will work until winter.

My very first set up, I found a sweet spot from the basement to the attic, so I used my hole saw to open up a 4" hole, and ran sewer pipe up thru it, into a closet on main floor, boxed that all in, and then up thru closet ceiling, hole sawed another hole, and ran more sewer pipe up into attic. Up there, I built a suction box, for lack of a better term, then used a decent powered fan, pulling up from basement. Work like a charm......until it snowed!!

I wake up, to about a foot of snow, get out the snow blower, and clean drive way. The very last pass, I'm huffing and puffing, and I just happen to glance up...at my roof...the freaking gigantic hole, that was showing the shingles!!! I damned perfect hole, 6' across, and down to the gutters!!

I was absolutly paralized with fear!! I couldnt think, I knew I was totally exposed, and the freaking cop shop is like 2 miles from me, so they go by all the time!!

I ran like fool, to my garage, and dug out an old propane heater burner I use when I work in a cold area, took it upstairs, and fired it up, blasting at another spot, to make it not look like a circle.

All was well, that was 5-6 years ago now, and makes me laugh like hell sometimes at my stupidity!! I just have to remember there are 4 seasons where I live!!

Just my $.02