Abstract: In metal buildings, a plurality of purlins project down into the building and, in effect, serve as heat exchange fins, which conduct heat into the building in warm climates, and heat out of the building in cold climates. In order to counteract this phenomenon, each purlin is covered with a separate blanket of insulating material, which is held in place with a flexible sleeve that is laminated to the blanket. Two additional flexible sliding sleeves are used to complete installation at each end of the purlin.

Abstract: A thermal insulation jacket for hot water heaters includes a one-piece disc portion for the top of the heater and a wrapper for the body of the heater. Both the disc and wrapper are made of fiberglas and are held on the heater with strips of tape. The disc extends beyond the periphery of the heater and overlies the upper edge of the wrapper.