Abendroth & Root Manufacturing Co

Abendroth & Root Manufacturing Company was an American manufacturer of water heaters, water tanks and other sanitation equipment, and later, automobiles.

The company was founded in Newburgh, New York, in 1866. It was known for manufacturing the Root Water Tube Boiler and was noted for supplying the Philadelphia Edison Electric Light Company with 3,500 horsepower of boilers. It entered the automobile business in 1906. Using the name Frontenac, they catered to the upper middle class, featuring large-displacement four-cylinder engines. Only twelve were built in the first year of production.

Annual production peaked at 100 vehicles in 1907, and declined from there until production ended in 1913. Variations of manufactured vehicles included the roundabout, the touring car, the limousine, and a truck named the Model F. As a result of the decline in production, the company abandoned the effort and returned to their original business. The factory was located at the foot of Park Place.