Spring has finally gotten here in Michigan so I've started the project. The polebarn ended up being 24x40 with the boiler portion of it being 12 x 24. The "boiler room" will be 8x12 and the large hole in the pictures is 8 x 8 for 4 500 gallon propane tanks standing upright. I have 10 ft side walls so I made the hole 2 ft deep so I'll have a total of 12 feet so I'll have room for semi-truck rims for them to sit on and enough room so I can insulate the tops really well. The remaining room will be used for stacking approximately 6 to 7 cords of wood (depending on how high I feel like stacking the wood) as I was using between 12 to 14 cords of wood with the Central Boiler and I'm hoping for half that in wood with the EKO 60 and 2000 gallons of pressurized storage. The lines showing are the lines I used for the Central Boiler which are 3/4 inch pex with the blue one a extra line I placed in the installation that I'll now use for more wire to power the building. Time to start insulating the boiler room and studing up the walls while I await delivery of the tanks. I love summer but when I finally get done, I'll be ready for winter so I see if my planning has paid off while I am warm and oil free again.