SIP Professional Fireball 301DVS 164,000 BTU to 240,000 BTU stainless steel propane gas space heater. Ideal for heating factories, warehouses, garages and workshops up to an area of 1960m³ or 69,500cu.ft. The stainless steel combustion chamber and casing eliminates rusting and the heavy-duty construction means reliable, long-term use. DVS means that this heater can operate on either 110v or 230v. Offers a great variable heat output. The stand at the bottom of the heater allows you 3 settings to alter the direction of the heat flow up and down. Other features include gas hose and propane gas regulator, automatic gas shut off, leading Piezo ignition and turbo fan assistance.