Cool Facts: Iowa based LENNOX History

LENNOX Roots in Marshalltown, Iowa
The main manufacturing plant for Lennox furnaces and air conditioners remains in Marshalltown, Dave Lennox’s home town. The Dave Lennox Signature Collection is produced right here in Central Iowa.

Dave Lennox Built the First Riveted Heat Exchanger
In 1895 Ernest Bryant and Ezra Smith approached Dave Lennox in his machine shop in Marshalltown. The idea they brought was to build a heat exchanger from riveted steel, much more durable than the cast iron being used in existing systems. Dave reluctantly agreed, as his new tool business was just taking off. After completion, the men couldn’t pay for the project. Dave took over their patents, reworking their original design and proceeded to build the first Lennox furnaces.

Lennox worked its way into the residential air conditioning market in 1952, and has grown to be a world leader in heating, ventilation, and air conditioning. Lennox has made great strides in building “firsts” like the Pulse furnace that produced efficiencies over 90% and 2-speed condensers that attained 15 SEER. Lennox has become the first again to achieve residential systems with SEER ratings over 20!

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