What is a Flueless gas fire? Flueless fires incorporate the latest in gas fire technology & do not need a chimney or flue to operate. Instead the combustion gases pass through a catalytic converter system positioned at the top of the appliance which converts carbon monoxide into harmless carbon dioxide & water vapour levels of which are so low they are typically present in fresh air. In fact the catalytic converter works so effectively that it can actually help to clean the air by neutralising airborne particles & odours therefore helping to reduce household allergies. This Smeg flueless fire can be placed in any room of your home excluding the bathroom where a standard 8mm Gas pipe is present providing it has adequate ventilation a minimum room size of 23-30 cubic metres & 10cm clearance on either side of the fire 80cm from fire to ceiling & 6cm to the floor. Please Note: This must be installed by a registered Corgi Engineer Catalytic system (No flue or chimney required)8mm diameter gas inlet Flame failure device Piezo spark ignition Oxygen depletion sensor & control valve mounted on lower right hand side Designed for minimum room size of 23 metres cubed Requires minimum clearance of 100mm each side 60mm bellow & 800mm above For use with natural gas G20 CAT 12H Stainless steel trim Dimensions: 590 x 526 x 149mm (H x W x D)