Insulated Air Ducts are used for low pressure heating and cooling systems. It exceeds all requirements for commercial buildings in addition to code for residences. This is used in main trunk and return lines. It absorbs sounds that other types of ducts transmit, such as echoed conversations in other rooms, furnace starts and stops, and air rush noise, as well as eliminating cracks and pops due to expansion and contraction during operating cycles.
Insulated case circuit breakers are molded-case breakers using glass-reinforced insulating material, such as fiberglass, for increased dielectric strength. In addition, they have push-to-open button, rotary-operated low-torque handles with independent spring-charged mechanism providing quick-make and quick-break operation. A choice of various automatic trip units are available in the insulated-case breakers. It is provided with electronic trip units and has short-time ratings and ground fault sensing capabilities.