Although this term that we use hvacr is all encompassing, realize that a lot of companies, including mine, have things they specialize in. Maybe they don't do Residential Maybe they only do commercial or vice versa. Maybe they do neither. and they're only in factories.
They're industrial. But if they do do Residential Maybe they do oil boilers and they don't do the newer Technologies or vice versa. they do the Mini Splits and all the new technologies inverters that are coming down the pike. But they don't really mess with the old stuff.
They don't mess with oil boilers and things like that.