Fitted with a catalytic converter so no wall required, just hang and connect to supply! But are they as good and safe as they sound? I've not seen one in the flesh, just going by website reviews/supplier descriptions. They sound good...? I'd be using with Propane not mains gas which I presume is doable?
Here's some FYI: http://www.fireplacemegastore.co.uk/catalytic-flueless-gas-fires
Here's some FYI: http://www.fireplacemegastore.co.uk/catalytic-flueless-gas-fires