Super Heat 3.5kW Gas Boiling Ring – An Outdoor LPG Single Burner A compact, high output outdoor LPG boiling ring that's got a cast iron burner with a nice ceramic coating, a brass adjustable gas tap and a stainless steel front that can take a bit of a beating. It's got a 3.5kW output, a 100mm burner diameter and it'll run on either propane or butane - but you'll need to make sure you're using the right pressure for whichever one you go with (37mbar for propane, 28mbar for butane). It's 300 × 300 × 210mm in size and weighs 3kg, so it's nice and portable. The Super Heat 3.5kW Gas Boiling Ring is a no-nonsense, easy to use outdoor burner that gets the job done without any fuss. The cast iron burner does a decent job of producing consistent heat at a 3.5kW output that's perfect for boiling water, cooking with a wok or even throwing together a caterin