Today on Boiler University's Weekly Boiler Tips, watch as Jude talks about inspecting the rear boiler door refractory and what to look out for. This is a large part of protecting your boiler from the heat inside so checking on it is critical. Weekly Boiler Tips are compiled by the knowledgeable and remarkably prolific content creators at WARE, a family owned, third-generation, 69-year-old commercial and industrial boiler rental and service firm based in Louisville KY. You can learn all about this and more at WARE's Boiler University.