Super Heat 6kW Gas Boiling Ring - High Output Outdoor LPG Single Burner The Super Heat 6kW single burner is a real powerhouse in the Super Heat range - it puts out a whopping 6kW from a 135mm cast iron burner which is perfectly balanced by a brass adjustable valve and a stainless steel front panel. You can use this on either propane (at 37mbar) or butane (at 28mbar) and it measures 400 x 400 x 210mm and weighs a manageable 6kg. Note that this is for outdoor use only - and it comes with a 12 month warranty. Where the 3.5kW single ring is a great all-rounder for everyday outdoor cooking, the Super Heat 6kW is where things get really serious. Its 135mm cast iron burner delivers nigh-on double the output of the 3.5kW ring - which not only gets a big stockpot boiling a whole lot faster, but can also sustain a high heat level for cooking big volumes (like