Firing an air over

[jrthe3]

I building a new air over arch for this season I put the window in the door what am I looking for well firing when should I adjust the air over or air under both of witch have
total adjustment

[Painted Cow]

that is a genius tag line

[maple flats]

You want to see a complete turbulance in the flames. I have a sight window to install, but never did. I can see in the slight gap between the double doors.
You will find that once you find the correct setting, you can leave it there with no further adjustments. Be prepared to make more syrup burning less wood and getting a faster boil at the same time. I think my AOF is the best improvement I ever did. Congratulations, you will really like your AOF!!!

[Waynehere]

I just finished up my AOF as well, and installed a site glass. I hope it works well to make adjustments too...

[jrthe3]

Not real sure how well it going to work I did put the heat exchanger in but ran out of money and not able to get the right high pressure blower it needs so I have to settle for a old heater blower for this season

[Jeff E]

I installed over air in my 3x12 this year also.
I put in 6x 3/8in air outlets along each side, connected to a mainfold, to the same blower I had installed for forced air aimed from under the fir. It will be about 60% air on top and 40% under, with natural draft as well. I have a damper on the over air.

No test boils yet. I am looking forward to the first fire-up!
The old Leader is looking mean! Piggyback type steam pan with blower over the flue pan, big pipes on side of the fire box, painted flat black (stove paint). Looks 'nasty'!

[wiam]

I installed over air in my 3x12 this year also.
I put in 6x 3/8in air outlets along each side, connected to a mainfold, to the same blower I had installed for forced air aimed from under the fir. It will be about 60% air on top and 40% under, with natural draft as well. I have a damper on the over air.

No test boils yet. I am looking forward to the first fire-up!
The old Leader is looking mean! Piggyback type steam pan with blower over the flue pan, big pipes on side of the fire box, painted flat black (stove paint). Looks 'nasty'!

Is this a squirrel cage or a radial blower?

[Jeff E]

Radial blade.

[jrthe3]

Radial blade.
Is this type of blower I need what size would I need for my 3x8 for both over and under air

[tom jr.]

jr, I have a 10 9/16'' raidial blower coming for mine, grainger #4c108 or 7c447 I have not got it yet but should be here in a day or so (bought it on ebay much cheaper) using it on my 3x12 this year. also i think the same seller has one or 2 more left check it out

[maple flats]

I have a radial blower (high pressure) feeding my rig. I start with a single 4' PVC pipe off the blower, then split into 2- 3" pipes. One pipe feeds the under fire air, the other feeds the over fire air. I have a ball valve on each (they were free) to control the air flow. After much experimenting I have been using about 1/3 open on the under fire air and about 75% open on the over fire air. I do not shut the blower off when I refuel the arch and nothing is blown out the door when opened.

[junior1]

Are your air nozzles in the box straight across from each other or are they offset. we are going to install them in our cooker this year and trying to figure out the final details.

[maple flats]

Mine are directly opposite, but angled down. Works like a charm!

[Jeff E]

My nozzles are 6" below the pan, angled down about 15 deg. and the ports are offset, left side and right side. With the goal being turbulent air, I thought offset would be an advantage.

Mine is a 3x12 rig, fire box is about 42" deep. 6 ports on each side. Each is fed with a 3" manifold.

Maple Flats, do you monitor stack Temp? If so, what do you run at?

[junior1]

what diameter nozzles do you have off of a 3'' manifold?

[Jeff E]

3/8 in ID galvanized pipe.
I used 3/8 x 5 in to go through the side of my arch, which has full brick and arch board insulation. I cut about 1/2 in off the inside, at an angle to match the slope of the brick, and to make sure it was slightly recessed in the brick so I cant hit them while loading wood.