One complete central air unit is a "2 ton York 10 seer" and the other I think is a "2 ton Armstrong"---when you call to inquire I will confirm the actual brand of unit. Both complete central air units work great. There were 2 of us in a neighborhood who decided to go from oil heat to a heat pump. Well heat pumps also have air conditioning for the summer, so this is why we are replacing our c...