FACTORY DIRECT SHIPPING SM Mr.Heater Big Maxx Work Shop Garage Heater Unit operates with natural gas. Included is a conversion kit that changes the unit from natural gas (NG) to liquid propane (LP) gas. Spark ignition features self-diagnostic control module. Includes 2 angle brackets for ceiling mount. Low Profile Design - can be installed in low-ceiling buildings. Minimum 8' clearance from floor to base of heater required. 1/2 " gas connection. CSA certified. Power exhaust allows for Category 1 vertical or Category 3 horizontal venting. 50,000 BTU heats up to 700 square feet. Cat.# 445708 OEM# Description F260550 50 NG Suspended Heater Mr.Heater Big Maxx Work Shop Garage Heater Unit operates with natural gas. Included is a conversion kit that changes the unit from natural gas (NG) to liquid propane (LP) gas. Spark ignition features self-diagnostic control module. Includes 2 angle brackets for ceiling mount. Low Profile Design - can be installed in low-ceiling buildings. Minimum 8' clearance from floor to base of heater required. 1/2 " gas connection. CSA certified. Power exhaust allows for Category 1 vertical or Category 3 horizontal venting. 80,000 BTU heats up to 1,000 square feet. Cat.# 465380 OEM# Description F260560 80 NG Suspended Heater Items shipped direct to you from the factory. Freight extra. 5-12D REVISION 06/20/17