Tjernlund Products Inc. has updated its free resource CD with thousands of pages of data, including product literature, specifications, fan curves, maintenance and installation manuals, diagrams and installation photos. The disc also includes PowerPoint presentations on the company’s draft, combustion air and ventilation products, including the Combustion Air In-Forcers, Duct Boosters and UnderAire crawl space fans.

 Tjernlund Products Inc

(800) 255-4208