3x10 Evaporation Rate?

[miohman]

I am running a 3/10 raised flue, 7' Flue pan. Wondering what I should be able to get for gph. No blower. Our stack temperature stays at about 300 degrees F. Is that low? We have trouble getting it any higher. Just getting started here in the Great North.

Thanks

[n8hutch]

What size stack pipe are you running? How much stack do you have? I assume 20+ feet? My arch is 2.5x10 and w/o a blower it ran around 500 on inside of pipe. With the blower it's around 900-950. And what a difference it makes.

[lakeview maple]

I have a D&G 3 x10 drop flue with a auf and I checked yesterday and Im getting 100 GPH. Im not sure of the stack temp ,hope this helps.

[motowbrowne]

I do between 60-70 with my 2x10 with an 8' flue pan. My stack thermometer doesn't work if the wind is blowing on it. Sometimes it says it's at 200, but obviously that's false. I've gotten it to 1000 with natural draft. Maybe your thermometer is not functioning properly.

What kind of wood are you burning. Best performance will be with softwood spilt really small and adding wood about every 3-5 minutes. Keep the firebox 3/4 full. Only open one door at a time. Get the wood in as fast as possible and get that door closed again. You should be able to do 85-90 gph no problem.

[jrthe3]

My 3x8 raised flue with hoods and preheater and high pressure blower air over with heat exchanger on flue gases I running around 300 stack temps and 130 gallon of SAP an hour on our 3 x10 we had before we parted ways it was raised flue hoods preheater 20 foot stack and a small air under blower stack ran 1200 degrees and boiled 150 gph. I also push my rigs hard last evaporator I had pushed it so hard cought the roof on fire around the roof Jack

[Mark-NH]

Do yourself a favor and add forc d draft. Best improvement for gph, little money and easy install.

[Sugarmaker]

Our 3 x 10 antique King Arch has 5 foot flue pan and 5 foot front reverse flow pan. Custom flue pan with 9 inch drop flues. AOF and AUF. Steamaway too. We can get 130-140 GPH if we stay on top of it. Our old pans we could get about 90-100 GPH. The new flue pan really helps! Doubled our surface area.
What type of stack temp device do you have? We have a wood stove bolt on which is about 5 feet up the stack. (not a probe) Our stack temps with the new pans is 350 to 600. 500 deg F is optimal. our old pans could go 600 to 700.
Regards,
Chris

[northwoods_forestry]

We run a 3x10 Leader maxflue with a preheater on an airtight arch. When alone in the sugar house I get it up to 100-125 gph with a stack temp between 900 - 1000. When I have trusted help it can be pushed to +/- 150 gph with a stack temp of 1200.

[treehugger]

My 2x8 raised flue, hoods, preheater and high pressure AUF with small,good and dry wood firing every 5 min will get 70+gal/hour. But with out killing myself 60-65 gal hour evap rate is normal. Air and preheater will help out tremendously.

[motowbrowne]

My 2x8 raised flue, hoods, preheater and high pressure AUF with small,good and dry wood firing every 5 min will get 70+gal/hour. But with out killing myself 60-65 gal hour evap rate is normal. Air and preheater will help out tremendously.

This right here is a great reminder for me to work on my setup for next year. I have the blower all ready to go, I just need to seal up the front of my rig and get it all installed. I get 70gph out of my 2x10 running plain Jane. If I added AUF and a preheater, maybe I'd see 90. 90 would be really nice on those long boiling days!