Don, your Yellow Flame has a 21x36 base,but what is the overall or working footprint, i'm curious for my own situation. Working = space needed around it to fill hopper,maintenance,etc.,what space would you need if you were to partition boiler into its own room ? I think that would help give at least several of us a better idea of the space needed for our plans, should help oldsch to visualize his shed space working or not,thank you,nice boiler !!!!