This sip propane heater has been designed to be ran on 230v and 110v supplies allowing for more flexibility and an easier time for the end user ideal for workshops garages and elsewherethe 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