Heat exchangers, other than parts of machines; Heat pumps; Commercial and industrial cookware, namely, gas and electric boilers, gas and electric broilers, gas and electric roasters, gas and electric braising pans; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, solar panels, control panel, switches and electrical wire, all sold as a unit; Industrial boilers; Oil and gas burners for industrial use
Environmental Control Apparatus