Originally Posted by mtbdudex
What is your time frame to buy your inline fan?
Likely within the next 2 weeks, though may be 4-5 weeks until I have time to install them. I've got 2 biz trips between now and then that are cramping my ability to work on the HT project.
I was on the fence w/the in-line fan too, but last night I decided it's better to have it than not and wish I had one if we have a football party, etc.
I want to use one to remove heat from the below AV rack, I'll have it exit outside of the HT in the rec room....
Rec room side, it will exit above the drop ceiling, I can run a flex duct there and fan (this is 2 year old picture, before 4ft door installed)
Most likely "on" via the HT on for simplicity .... 12v trigger off the Denon 4520CI
Ah, so you'll have basically a dead vent. Is your A/V rack sealed or is it open to the room (looks like it's open, from what I can see in your pics)? Wouldn't you want to mount the intake up high (i.e. heat rising)? You could possibly install a rackable fan or two down low to help push the air up, though with good suction from an in-line fan I doubt you'll need to do that - even if your rack is open to the room.
Since you'll be venting to another room that could be occupied, I would recommend against the Fantech fans. They are too loud, even behind the acoustic tiles. The Panasonic bathroom fans are comparably priced and appear to be the quietest. They can really move some air too. Zoro Tools had a 20% off sale yesterday, but I could not do my research fast enough to take advantage of it.
My circumstances are going to be a bit more of a logistical challenge. I'm planning to zone my HT room, and I've got to be certain the in-line fans don't attempt to operate when the dampers are closed. My thought/plan atm is to hookup a 24v relay next to each in-line fan (1 supply, 1 return) and trick the zone system into thinking the relays are spring dampers (in which case the zone system has to apply continuous voltage to keep them open).
One issue I haven't figured out yet (would really appreciate input on this from anyone).... Do I need an in-line fan in the return duct if I have one in the supply duct? Put another way, can I get away with good results if I only have extra air movement in one or the other (supply or return)? My impression so far is that I'd be better off with the same throughput fan in both supply and return ducts to ensure equal CFM flow, but I have not been able to confirm this.