Lennox Industries Inc. is a premium manufacturer of residential and commercial heating and air conditioning equipment and related products. It is recognized as the leader in high-efficiency comfort conditioning and is the oldest of the Lennox International companies. Lennox traces its roots back to 1895 when Dave Lennox designed the first riveted steel furnace in Marshalltown, IA. Lennox moved its corporate headquarters to Dallas in 1978 and today manufactures at three North America sites with distribution and sales offices throughout the United States and Canada. Lennox markets its products via one-step distribution, directly to its network of 6,000 independent dealers.