Russ,

I’ll get back to you on the H.P. blower specs. Not sure how to calc. air flow requirements for the arch and for the flue pan blower. Blower isn’t bad, but you have to raise you voice to talk, which can get old. I would like it quieter. It’d also make it easier to hear what the RO machine is doing which would be nice.

Evap rates are based on the RO machine. I set it to 2gpm concentrate, and it’ll creep ahead of the evap…sometimes I can keep up with it if I really put the heat to her. I figure 90gph is about right. Based on the figures above, I’m making like 14gph of syrup including startup/shutdown. I’m happy. I'd still like to get more sap though, so I can run it longer and get better use out of it.

I just used regular caulking. I didn’t know they made food grade. If it helps, it’s silicone based.