pete_c
Guru
you're going to create too high a static and essentially starve the furnace/blower.
My very first power attic fan installed in the attic did the do of a negative pressure in the two story zoned HVAC system in the 1980's.
It was just a phone call asking for the biggest and best power attic vent that was available at the time. Problem was that there were not enough vents in the attic to the outside air.
After turning it on the first time I called the gas company as I thought I was smelling gas and to my amazement I was smelling gas coming out of the HVAC in the basement and on the second floor HVAC unit. I shut off the power vent and contracted a roofer to install more vents and that was it.
The newer home today is very tight with more insulation than the older home built in the 1970's. I do utilize an electronic filter with charcoal on one side and a regular filter on the other side of the electronics. I change these filters every month and keep the HVAC fan on 24/7 (low speed). I do also open windows on the two floors when the outside temperatures are OK.
The guru builder knowing about the high radon levels in the early 2000's did properly(?) / passively vent out the two wells in the basement. Some neighbors did go to that active radon venting thing with electric fans and other do whats that cost some more than $2000 or more. These huge PVC stacks today stick out of the side of their basements and go up attached to the side of the ir homes; looks a bit too ugly for my tastes; but I guess it fixes that radon gas stuff. Their original builder didn't do anything relating to radon levels in their homes and probably assumed they would never ask? Not really sure that makes it better or just a more costly solution?