My woodshop is my 2 car attached garage. I am nearing the end of a large cabinet building project that has lasted nearly a month. There is considerable sawdust on the floor but the shop is so full it is too hard to clean up until the project is done. My neighbor was over the other day and told me I should build a screen around my furnace (which is also in the garage) to keep airborn dust away from it as it could ignite the particles and explode. It is all pretty much enclosed. Draws in cold air from inside the house and I have no heat registers in the garage. You'd think my propane heater would ignite if anything was going to. Should I be concerned? Thanks.....DJ