Lennox Offers More Ways to Reduce Operational Costs and Installation and Maintenance Hours DALLAS, TX ‘With energy costs and outdoor temperatures rising, Lennox is expanding its T-Class Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window) Product News 2009-04-30 The Staff