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.
2011 2x6 leader and 125 taps and 30 buckets
2012 another 200 taps on line and an addition to the sugar house
2013 hoping to hit 400 taps on line and 25 buckets and adding a sap Guzzler
2014 Brand new D&G 3x10 traditional evaporator and going to 450
2015 D&G 3x10 and kicking the door on 500 on line
My wife Marci who puts up with me buying "Maple Stuff"
1 65 yr old father inlaw who is priceless
And the good Lord above Amen
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