Even with yesterday’s 50F degree day we still had some buckets with a little bit of ice skin on the top of the sap. I am too stingy to discard this ice for fear that I am throwing out even the tiniest bit of maple sap, despite what I have read about this ice containing virtually no sugar at all. After filtering out the maple sap I got my oldest to stack some of the fire wood I split into our garden dump wagon. The wagon helped to keep it off the ground. I have confirmed that wrist sized pieces really do work best, and I use a mix of hardwood and softwood off cuts from the wood shop.
After reading a lot of posts about adding blowers to evaporators to increase your boil, last year and this year on the Mapletrader Forum, I figured I would see if a little Air Under Fire, AUF would actually work. I read about people adding fans in front of their ash door and last summer I picked up this Lasko fan for the house. The height seemed right and it was adjustable, so I could set it on the ground and aim the air straight into the ash pan of my WF Mason 2×3 Hobby Evaporator. Now Bill Mason does have an add-on option for a blower that you can to most of his evaporators and hindsight being 20/20, I should have ordered one set up for my particular evaporator, but I was unaware of the benefit until I saw it first hand yesterday.
So below is my WF Mason 2×3 Hobby Evaporator, boiling outside with the temperature around 40F and a slight wind from the West. This was my normal set-up the pan boiled and I had steam and I want so say I was probably in the 5-6 gallon range on evaporation rates but I did not see the billowy steam that you would see at larger sugarhouses. I had written my lack of steam off to just boiling outside.
Below is a photo of my WF Mason 2×3 Hobby Evaporator with the Lasko fan set at it’s lowest speed and aimed into the ash pan of my evaporator. I propped the ash pan door open with a small board. As you can see the amount of thick steam coming off the pan was noticeably different than the photo above. I was shocked! Now because I was melting a lot of ice during this boil I did not have a good way to measure the evaporation rate, but the thicker plume of steam coming off my WF Mason 2×3 Hobby Evaporator made me feel awesome.
When the wind blew strong enough to disperse the quick column of steam you can get a feel for the rapid boil that was in my stainless steel syrup pan.
Even as I was melting frozen sap, the column of steam I was seeing was intense. At the end of the day I boiled of many buckets worth of liquid sap and frozen sap that I swear would have taken me two 4-hour boils and I was wrapping up shutting things down in under 4-hours because I ran out of sap. Hopefully during the next run, I will be able to time and watch the evaporation rate using the blower with a little more accuracy than I have so far, but this will definitely improve things for me as long as I have the sap to run my WF Mason 2×3 Hobby Evaporator with the blower fan. Two words of caution to anyone planning on doing this. First shut off or point the fan away from the ash door when you are ready to reload more wood. If you keep the fan on you will below coals out the wood door when you load. Second you have to be mindful of a few hot coals blowing out the ash door as you turn the blower on/off or point it in the ash door. This was not a big concern for me as I boil outside on pavement that is typically wet with snow melt.
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