I look forward to this time of year. We took a tour of some of the local farms last year. This one, had a small building, using firewood to boil the sap. Just a plain open air boiler. His end product was some of the best tasting syrup, I had ever experienced. My sweet tooth is already for this year, LOL. We use to evaporate to a ratio of 50 to 1. That was some very nice syrup. Today, I believe they use 42 to 1.