Natural gas or propane only used on 1 job for 24 hours . Purchased new for $4700 plus tax .like new. Hooks up to natural gas lines can heat large warehouses, shops etc. Thermostat for temp controls and air filter.
Works and looks like new. You can not find this model for under $4500 out of ogalala NE. Where it's manufactured. Must have for winter warehouse jobs. I used it to pour a concrete floor in a building where the walls were not yet installed. Coated framing with visqueen and poured/ finished floor. - 15 degrees outside. Works awsome. Includes air filter.