Profile: McGill Airflow LLC is a producer of ducts. Our brands include Uni-Seal Duct & Fittings™, Uni-Gasket Fittings™, Acousti-k27 Duct & Fittings™ and Duct-D-Fuser Terminal Outlets™. We manufacture duct & fittings in round, flat oval and rectangular configurations. Our round and flat oval configurations are available with either single-wall or double-wall and insulated constructions. Our rectangular duct and fittings are available as single-wall, unlined, single-wall, lined with insulation or as double-wall and insulated. Our volume control dampers are used to regulate airflow in a duct system. Our access doors provide a convenient way to reach or inspect fire dampers and other equipment located inside a duct system.