in-line duct fans

[Steve-oh]

Anybody have any experience with in-line duct fans? Looking for input on whether they work or not. My son's room is hard to heat. While the rest of the upstairs is at 70 degrees at night, my son's room doesn't get above 66 degrees. His room is furthest from the furnace. there are dampers on each end of the run to his room and I have verified that both dampers are open. Any other input?? The little guy is only 16 months old, so I want to make sure he is warm!! Last winter we got by with an electric heater in his room, but he's going to be moving to a regular bed soon and able to get up and roam around his room, so I don't want the heater in his room anymore for him to possibly burn himself. Thanks much!!

Steve

 

[Mattlt]

Are vents closer to the furnace (and the thermostat) closed?

I have the same problem in my house. I have the vents closest to the middle of the house closed, and ones on the outer edges of the house wide open. and the extremities of the house are still cold. :-(

 

[skeletonizer]

I'm sure some tin knocker will chime in here but in the mean time....


If your duct sytem is properly sized and installed you should be able to regulate the flow by partially closing the dampers in the pipes to the other rooms. Trial and error until the flow is the same at every register.

Is thier a return vent in the offending room? Often times poor return can cause positive pressure in a room and keep heat from flowing. The register will flow good until you close the door then it will slow to a tickle. An in line fan would not help here at all.

Just some things I would explore...

 

[Steve-oh]

Our house isn't very large, and all of the vents are along the exterior walls of the house. There aren't any in the middle to close. I have tried playing with closing some vents in an attempt to force more air into that room, but it doesn't seem to help much.

 

[Steve-oh]

I'm sure some tin knocker will chime in here but in the mean time....


If your duct sytem is properly sized and installed you should be able to regulate the flow by partially closing the dampers in the pipes to the other rooms. Trial and error until the flow is the same at every register.

Is thier a return vent in the offending room? Often times poor return can cause positive pressure in a room and keep heat from flowing. The register will flow good until you close the door then it will slow to a tickle. An in line fan would not help here at all.

Just some things I would explore...

There is a return vent in the room.

 

[nate379]

Do you keep the bedroom doors open?

 

[malibu101]

Out of your application, but, I used an inline fan (Nutone) that looks very similar to a radon fan for the exhaust fan in my bathroom due to not having the joist height to install a conventional bathroom exhaust fan.
It moves alot of air and no humidity/condensation builds up in there. I'm very pleased with it in this application.
This is what I used for my application- http://www.nutone.com/product-detail.asp?ProductID=10336

 

[rodnok1]

Check the duct work if you can get to it. The idiots who did my last house put a run on the end of the trunk line, that room would be 90 degrees no matter what I did and other rooms would be cold. Moved the run to the side and the house evened out. I've seen runs with numerous bends (90's) that don't heat well either. Have you actually verified the dampers are open, sometimes they are put in wrong(handle points wrong direction). Is his room on a different floor?

 

[Steve-oh]

Check the duct work if you can get to it. The idiots who did my last house put a run on the end of the trunk line, that room would be 90 degrees no matter what I did and other rooms would be cold. Moved the run to the side and the house evened out. I've seen runs with numerous bends (90's) that don't heat well either. Have you actually verified the dampers are open, sometimes they are put in wrong(handle points wrong direction). Is his room on a different floor?

I have visually verified that the dampers are open. This bedroom is upstairs, no more than 10 feet from the thermostat. Our bedroom is also upstairs, and has no problem warming to whatever temp the thermostat is set to. The run to our bedroom does come off a different truck line (or maybe it's just the other end of the same trunk line??). not sure if that makes a difference or not.

 

[longboy515]

Sorry that I don't have any actual experience on the matter, but my parents just had 2 of these in-line duct pusher fans installed in their basement. Work is still being done (sheetrock being done now), and they haven't opened up any of the ducts yet to heat. I'm sure it helps some, guess time will tell.

 

[cautiouslyoptimisticone]

Anybody have any experience with in-line duct fans? Looking for input on whether they work or not. My son's room is hard to heat. While the rest of the upstairs is at 70 degrees at night, my son's room doesn't get above 66 degrees. His room is furthest from the furnace. there are dampers on each end of the run to his room and I have verified that both dampers are open. Any other input?? The little guy is only 16 months old, so I want to make sure he is warm!! Last winter we got by with an electric heater in his room, but he's going to be moving to a regular bed soon and able to get up and roam around his room, so I don't want the heater in his room anymore for him to possibly burn himself. Thanks much!!

Steve

Steve I installed a 7 inch fan in a six inch round duct (used reducers) then the duct goes rectangluar for my little guys room. Worked like a champ it runs off an induct thermostat. His original duct got revamped and the new run ended up with an extra bend or two and his room was always cold. He kept waking up from the cold. I picked it up at home depot and the reducers at a plumbing wholesaler. Glenn.