100 000 btu furnace for sale, brand-new and used.

Grieve Gas Fired Burn-Off Furnace (Inv.33074) Max. Temp 1650 Degrees F Power 480 Volts, 3 Phase, 60 Cycle Largest Motor 3/4 HP Heat Input 500,000 BTU Fuel Natural Gas at 10 Inch 14 Inch W.C. Pressure Serial Number 690018 Job 4538LA0198 Last Calibrated 7/30/14 Due 1/28/15 Three openings 10 In

I am selling my shop made frost removing machine, I built it entirely and have used it several times,   I'm going to try to include as much info as I can but if you have any questions plz contact me   It's has a 300,000 btu Smith, oil fired boiler / steam  cast iron furnace/ boiler which was installed brand new, it has the smallest standard nozzle in it , if more heat or faster recovery is needed, a larger nozzle can be easily installed.