At first, he tried boiling the sap down in our house, but at a ratio of 60 gallons sap to 1 gallon syrup, my windows were getting pretty steamy:) So, he rooted around in the old red barn, and found an old wood furnace to re-purpose, and created this set-up:
Do you see the old pressure canner on top of the furnace, and the steam rising? He's kept this boiling on and off all week now, and about once a day he's brought in one pint jar of syrup for us:
I'm a Canadian, I love this stuff -- and no -- it's not for sale:)