Boiling rate for wood fired Small Brother 2x8 evaporator ?

[ttowle3]

I have wood fired Small Brother 2x8 evaporator and wondering what the expected evaporation rate should be. The front pan is 2x2 and back pan is 2x6.
I read the rates in the other posting but mine is not getting near that and wanted some real data on it.
Thanks in advance for any info.

[boondocker]

I have a 2.5X8 raised flu CDL I bought it new in 2013 and it took me a few boils to get it figured out.....as of right now I can get 50-60 gph that's with no blower, Pre heater, or hood. The biggest mistake I was making was I had the draft door open to far. I open the draft door all the way to get the fire going then I close it up almost all the way and it takes right off and goes crazy. I also use a weed burner blow torch to start my fires.....the faster the base stack heats up the faster the fire will pull a good draft. Best of luck to you.

[PerryW]

Based on the evap rate of my 3x10 being 90-100, I would guess around 45-50 gph for yours.

[n8hutch]

I think lapierre lists there's at 45gph. I think the biggest thing is how your fire box & ramp are constructed & how you fire it and also the quality of the wood.

[motowbrowne]

Assuming you have 7" deep flues (not sure about 2x8s, but there's some 2x6s with 5" flues) I'd think 45 gph shouldn't be hard to achieve. One thing that really helped me figure it out was to only open one door when firing. Still throw wood over to the other side, but only open one door. Split the wood really small, add wood every 5 minutes, and keep the door open for the least amount of time possible. I get 60 gph pretty easy out of my 2x10 using these methods.

[Russell Lampron]

I think you should be getting around 40 gph with no blower or pre heater. I was getting 35 gph with my 2x6 before I added the hood with pre heater and a blower.

[treehugger]

I have a 2x8 raised flue. Has a preheater and a blower. I use good wood and usually get 62-65 gph.