This SIP propane heater has been designed to be ran on 230V & 110V supplies allowing for more flexibility, & an easier time for the end user. Ideal for workshops, garages & elsewhere! The Fireball 3711DV has been constructed form a rugged, corrosion resistant, stainless steel casing which allows for tough daily use, along with the wheel mounted dsign for easier manuverability. If thats not enough, these are also covered by a 2 year warranty.