1970's
Automatic Vent Dampers
Energy Vent
John Perkett from Dayton started Energy Vent, which was a better product due to being thermally actuated (and not electrically actuated). It could also be used on hot water heaters. It was a similar concept to the Vent-o-Matic but safer.
John Perkett contacted White City because they already had distribution rights for the Vent-o-Matic, and made arrangements for White City to be the distributor for the Vent-o-Matic.
A large Mormon sales force from Utah relocated to Cleveland and helped White City sell the dampers to residential customers. Their pitch was "Did you know you have a hole in your roof?"
The sales force would get downpayments, and then White City would install the dampers.
White City formed a separate LLC in 1977 called Mechanical Energy Savings for the vent damper business.
In 1979, Mechanical Energy Savings merged with White City Heating to form Geauga Mechanical.