eye8astonie, I think it is the law in NYS that you can burn wood to cook food, maple syrup IS food. They may be able to regulate safety issues and how the evaporator is set up for clearance to combustables but you should be able to use a wood fired evaporator. Check for the NYS law relating to cooking fires and cooking with wood, you should be able to get these online if you can word the search right.
What did the fire dept say was the reason for not being able to use it?
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.