Thermo Rite MT46 Z Decor Stock Zero Clearance Door for Martin Glass Option:Grey if covered components manufactured by Size & Description:48" SS Chimney Length if covered components manufactured by IHP are found to be defective in materials or workmanship during the 20 Year Limited Warranty period and while the Product remains at the site of the original installation All of our Empire branded heaters are made in the USA our custom made fireplace enclosure options include anodized aluminum Thermo Rite was awarded the first United States patent for tempered glass fireplace enclosures… a patent held exclusively by Thermo Rite from 1946 to 1963