Please post pictures of your air under fire set up

[82cabby]

Hi gang,
I am ready to add the air under fire for the 2x4 I am building and am looking for inspiration. I am replacing my barrel evap which had AUF so I am familiar with the concept. I just want to see how others have done it gather ideas and get motivated. So...if you have any pictures could you post them?
Thanks !
Dave

[DocsMapleSyrup]

Here is how I did my AUF. The blower to the left is the AUF. It's a 550 cfm Dayton. The blower on the right is for AOF. On the inside of the arch, the AUF comes up through holes in firebrick.

16865

[maple flats]

Chad, the AOF blower looks like a squirrel cage blower, correct? If yes, you will get far better results on the AOF with a high pressure paddle blower, that gives it the ability to give enough turbulance over the fire for more complete combustion without adding so much air you cool the fire.

[georgelineman]

What I did on my 2x3 is took an old oil burner, striped all the oil pump stuff off it. I made a new draft door and mounted it in that. drilled 8 3/4 holes in the sides of the tube. You can adjust air as needed. My arch has a 24x24 fire box. 16867 16868

[georgelineman]

Buy the way this was not my idea. I stole it from Matt @ the Longyear Farm in Woodstock NY
george

[maple flats]

Yes, an oil burner blower is a high pressure blower and is good for smaller size rigs.

[82cabby]

Thanks guys! Any pictures of the inside would be appreciated too.

[RileySugarbush]

There is not much to see inside most AUF setups. In my case, I just blow air in under the grate much like Chad does. The area under the grates needs to be sealed and the grates need enough opening for the air to blow through, but if you are operating with natural draft you have that.

[DocsMapleSyrup]

Chad, the AOF blower looks like a squirrel cage blower, correct? If yes, you will get far better results on the AOF with a high pressure paddle blower, that gives it the ability to give enough turbulance over the fire for more complete combustion without adding so much air you cool the fire.

Flats, the blower for the AOF is a high pressure blower that has already been replaced with a Koala high pressure blower for a bouncy house. The velocity coming out of my AOF nozzles is calculated at 84 mph.

[Sunnyacres]

I came across this blower I was thinking of buying to replace mine that crapped out last season. If anyone s in need here is the link.
http://www.surpluscenter.com/Featured-Items/160-CFM-115-Volt-AC-Dual-Blower-16-1549.axd

[craig1bc]

what speed blower are you looking to use the AOF?