turtle posted:
i'm in the HVAC business and will say rarely will i ever see a fan
booster fan ever work out.

I have heard that frequently, and between that and reports of too much
noise I was hesitant to go for this solution. The cost of replacing a
long section of duct with 12x10 or larger was prohibitive, so I figured
I would give the booster fan a try.

Part of my problem is that between the furnace in the basement and the
duct upstairs, my duct makes a total of (count them) 8 90 degree turns.
Trying to make this into a straighter shot would be pretty difficult.

boden posted:
Why wasn't it sufficient to just use FanTech's neoprene compliant couplings?

It probably would work just fine if you suspended the fan from them
(like they show in their brochure). I wanted to mount it more
securely, so used the plate form sound isolation mounts. Probably
overkill, but I do alot of work with vibration dampened equipment, and
I was trying to ensure that no noise would be transmitted through to
the ceiling joists.