Chrysler had a plant in Dayton, OH for years. (As did Frigidaire) Airtemp made window air conditioners, central air conditioners and furnaces.
Builders in the Dayton area used Chrysler Airtemp extensively in the 1950's.
My parents house was built in 1954 and had a very nice looking Airtemp oil furnace that worked well until they sold the house in 1999. I bought them a carbon monoxide detector in the mid-90's as I was worried about a furnace that old leaking fumes. No leakage whatsoever.
A funny story from my dad. The first year they moved in the furnace was not operating properly. After several attempts to fix it, Chrysler sent two men direct from the factory in Dayton.
My dad said they arrived in their white coats (like a lab coat), probably thinking they would just make a few adjustments and be out of their.
A couple of hours later my dad went downstairs to find the two technicians covered with black soot and oil and with the entire burner taken apart and spread over the basement floor.
Two dirty and unhappy factory technicians left at the end of the day, but the furnace worked!
If I am recalling correctly, Fedders bought the Airtemp Division from Chrysler in the 1970's.
A bit of trivia, Chrysler Airtemp was the first AC manufacturere to offer a window unit that fit casement windows.
It sat vertically instead of horizontally.
Barry