Pushed just over 100 gallons of sap in 11 hours through the evaporator yesterday, which is a laughably small amount to a real sugar operation. But we were pleased with those numbers, and thought it was pretty good for a 2'x3' flat pan on a homemade, natural draft arch.
Got pretty toasty standing next to it though. I think my jeans got so hot it melted the hair on my legs, and I'm now convinced that a zipper makes a passable substitute for a branding iron, especially when applied to sensitive parts of the anatomy. Need fire resistant chaps, or something along those lines.