HVAC Manufacturers Past and Present

Received this link in an email today, thought it might be useful



Thanks, Chris.

There is some models that I carried when I had the heating and cooling company that is inaccurately listed. DO NOt treat this list as gospel.

I do not see Arkla Servel- Natural Gas Air conditioning with Ammonia heat exchangers from 50’s to 70’s

I’m looking for the age of a Lennox oil fired steam unit model # CDB-E3.7