According to the Uniform Mechanical Code, an environmental duct is one used to convey air at a temperature not exceeding ____ either to or from an occupied area and not to be a part of a heating or airconditioning system.

According to the Uniform Mechanical Code, an environmental duct is one used to convey air at a temperature not exceeding ____ either to or from an occupied area and not to be a part of a heating or airconditioning system.