Can the Econoburn EBW 300 be plumbed into a heat exchanger? I presently have an unpressurized outdoor boiler that is plumbed into a heat exchanger. It sits 250 ft from my house. I would like to put the EBW 300 40 ft from my oil boiler and run underground pex 40ft to my oil boiler. I can place the EBW in a shed that has a chimney in it. The EBW is a pressurized system.