I am 62, We heat our small home with a stoker stove that sits in the dining room to a dedicated chimney. My wife has asthma and bronchitis which means she is not allowed to get near the ashes. No matter how careful you are, your going to float a few ashes when you change ash pans. It's the nature of the beast. I do all the coal loading, hauling, and ash removal. I hooked up a Bucket a Day to feed our oil fired boiler. We were heating our water with a hand fired bucket a day coal water heater via a heat exchanger. I unhooked the flue pipe from the oil boiler, swung it over and hooked up the Bucket a Day. It's great for shoulder months and or hot water. I hate burning the oil!!!
I caught the flu and knew that my wife couldn't tend the coal stove or the Bucket a Day. Before it knocked me all the way down I disconnected the flue pipe from the bucket a day, swung it over and reconnected the oil boiler. Put the fuse back in it and fired it off.
I unplugged the stoker and let it go out. Then I went to bed and didn't get back out for 4 days.
If you have the room you could pipe a coal stoker boiler into your existing boiler. No cutting holes in the floor, no running duct work, nothing except put the coal in and take the ashes out. I move my coal in 5 gallon buckets and since I don't like to lift 40 lbs of coal chest height, I shovel it in the stove from the bucket until it's half in then I pick it up and pour it in the hopper. Keep the oil burner as a backup and install either a stoker with a power vent or a coal fired boiler.
New Beginning Church