When I had a half pint (24x36") I boiled until I had only about 1/2-3/4" left. I then slid the pan off and onto a bench I had moved next to the arch. Then I let it steam off some, but then tilted the pan before the steam quit and drew the concentrate into a large pot. I then finished it in the kitchen. I did not rapid boil until I was getting close, I just used a sub boil heat to get less steam in the house at once. When it was thought to be getting close, I turned the heat up, turned on the ceiling fan and opened 2 windows. It went well and we had wall paper in the kitchen.
I now drain the concentrate from by flue pan into a barrel. I close the valve to the syrup pan. Then I put water in the flue pan and light the fire. As the concentrate gets down just under an inch I let the fire burn out. Sometimes I need to slow the boil by opening the firebox doors. When the fire is out, I draw the contents and pump it into my finisher which already has the last batch in it. Then I finish it in the finisher, in the sugarhouse.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.