Tjernlund Products began designing and manufacturing oil fired air furnaces in 1938. Today, Tjernlund has evolved to engineer and manufacture products that solve exhaust, draft, combustion air, ventilation and heating and cooling problems, as well as offering technical support so products are easy to select and install. The company services residential, light commercial and commercial markets with distributor stocked products and engineered specific systems, including fixed speed venters, inducers, combustion air intakes and duct boosters. Tjernlund utilizes 3D computer-aided design processes and CNC turret presses and brakes. The company has been family owned and operated for four generations.