Insurance companies can be a pain in the butt for sure. They are all promises when they want your business and all denial when you have a loss. It almost seems like you need to change every few years to keep them in line. When they think they got you they raise rates. Sometimes I think they look for a reason to cancel you after you been a long term customer. The actuaries figure your due for a big claim and if they dump you all those premiums are secured profit with no out pay. Oh well, I digress. I would simply shop around and see who will do what. In our area a lot of homes have outdoor wood furnaces right close to a home, they surely aren't any safer than an evaporator that will only run select days for 6-8 weeks. Maybe an appeal with a detailed description would help. Your agent should be doing this for you. You being on a residential lot may be a big problem. I have asked my agent and he says I am covered under my umbrella for the farm.
I am curious, has anyone here had a Maple related claim? How did your insurance treat it? I know I am just a small hobby guy and if I suffered 100% loss on my shack and equipment I could just bear it and be Ok. I'd hate it but it wouldn't ruin me. Everything is paid for and I'd probably just quit. So I don't worry about it. It is no danger to my house as it is a quarter mile from my house. It is closer to my rental house, but still a safe distance.