American Gas Lamp Works Gothic 2900R 14" Timeless Black Residential Pier Mount Aluminum Natural Gas Lamp With Triple Inverted Gas Mantle Light Assembly, Flat Tempered Glass Panes and Loop Finial btu170000 Model 530012 Clearance Zero Zero clearance Size:4" to 7" Model 530012 Clearance Zero Zero clearance when installed into a masonry chimney and wrapped with a 1 2" ceramic fiber insulation blanket Model Ice Glass for LBS60 Side Tray Size Range 0 American Gas Lamp Works LLC (“AGLW”) warrants that its gas and electric lighting fixtures (the “Product”) will be free from defects in material and workmanship from the date of manufacture by AGLW for the following periods: you may add an electronic ignition system for an upcharge