Energy Efficiency Born in 1883?

"The beginning of energy efficiency." That's how Johnson Controls headlines a full-page ad in yesterday's Wall Street Journal, in which it celebrates "125 years of making buildings more energy-efficient for our customers."

Specifically, the company claims the invention of the electric room thermostat by Professor Warren Johnson in 1883 as the seminal moment in the energy efficiency industry's history. It's a clever claim, nicely tying the company's anniversary to the growing importance of energy efficiency in today's world.

You can see the entire ad below and learn more about the company's contribution to energy efficiency at