Profile: Design Architectural Heating, Inc. specializes in the design and manufacturing of extruded aluminum heaters. We manufacture draft barriers, pedestal heaters and convectors. The model LB electrical draft barrier heater has enclosed junction boxes, full length thermal overload protection, ¼ pencil proof discharge grill, and aluminum fins for cool surface temperatures. The model WLB hot water draft barrier heater has 12 gauge extruded aluminum front & back, snap fit 2 piece construction, and multiple heater sections on one common back.