1931 was a year of great American classics: Charlie Chaplin in the theaters, baseball legends Lou Gehrig and Babe Ruth, the first Dracula movie, and convicted gangster Al Capone. But the classics in the heating, piping, and air-conditioning industry belong to our advertisers! Take a walk through history with these vintage ads.


National Regulator Co.

National Regulator Co. ad from the January 1931 issue of Heating Piping and Air Conditioning.

Metaphram Damper Regulators by National Regulator Co.