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-   -   Help me select the correct inline fan for this fireplace project (http://www.diychatroom.com/f17/help-me-select-correct-inline-fan-fireplace-project-167089/)

xpauliber 12-21-2012 06:09 PM

Help me select the correct inline fan for this fireplace project
 
I have a wood burner in my basement that radiated heat up to 80 degrees nicely, but the heat wasn't moving to the upstairs living area. I fabricated a heat shield to capture alot of the heat off of the wood burner. Here is a pic of it:

http://i655.photobucket.com/albums/u...psee7f2db0.jpg

I capped off the far end and put a 6 inch piece of ducting and then hooked it up to a furnace blower just to see if the heat shield was effective at trapping the heat and funneling it to the ducting. Well, it works fantastic. I had the furnace blower pointed at the stairs and I was able to get the upstairs up to 77 degrees without having any type of ducting. Now, I need to get the heat upstairs. I cut a hole in the floor and inserted a register and ran 6" flex duct from the register in the rafters and down to my heat shield. It's approximately 16 feet of flex duct. I want to use an inline fan to connect the duct and the heat shield but I don't know what cfm fan I need. I want the fan to be strong enough to suck the air from the heat shield and blow it the 16 feet to the register, but I don't want to "over-fan" this project and wind up with a really noisy fan that isn't necessary.

I would welcome any suggestions on inline fans with 6" inlets & outlets and/or what cfm is necessary for this project. I was looking at the Vortex fans, but 450 cfm seems like overkill.

Thanks for all of your help!
-Paul

jagans 12-21-2012 07:16 PM

sounds like a good place for a variable speed fan with a pot, no?

xpauliber 12-21-2012 08:17 PM

Quote:

Originally Posted by jagans (Post 1077698)
sounds like a good place for a variable speed fan with a pot, no?

Will a pot allow me to adjust the speed of the fan? That sounds like a great idea!

Any fan suggestions?

beenthere 12-22-2012 05:05 AM

Hopefully, you have another hole in your floor for air to come down to the basement to replace the air your blowing into the upstairs. So you don't back draft the wood stove.

Any fan in the 100 to 150 CFM range should work.

beenthere 12-22-2012 05:06 AM

Hopefully, you have another hole in your floor for air to come down to the basement to replace the air your blowing into the upstairs. So you don't back draft the wood stove.

Any fan in the 100 to 150 CFM range should work.

xpauliber 12-22-2012 07:24 AM

Quote:

Originally Posted by beenthere (Post 1077832)
Hopefully, you have another hole in your floor for air to come down to the basement to replace the air your blowing into the upstairs. So you don't back draft the wood stove.

Any fan in the 100 to 150 CFM range should work.

There's a wide open stairwell that is almost adjacent to where the register in the floor is. It should supply more than enough air back to the basement.

I'm wondering if I use a fan that is more than enough with a pot and then I have the ability to really crank it up if I want, but I can scale it back also?

xpauliber 12-22-2012 10:44 PM

I am thinking of going with this fan:

http://www.htgsupply.com/Product-Gro...nline-Fan.asp#

And also getting the fan speed controller:

http://www.htgsupply.com/Product-Blo...ed-Control.asp


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