This boiler was just taken out of service about 3 weeks ago and works perfectly. Variable output to 95,000 BTU's. Burns rice coal and hopper holds 250#. Requires a 6" class A chimney. There is an option for a hot water coil and an oil burner. The boiler can be used with hot water heat or with forced air with the addition of a heat exchanger. I can load this in your truck or trailer or willing to deliver within a reasonable distance. Harman advertised this boiler as capable of heating 3,000+ sq. ft. I was heating 4,000 but unit did struggle in very cold weather. This unit would be best suited for around 2500-3000 sq. ft. The hopper and stoker are reversible with the vent. PM me if interested.