

Surprising advice on HVAC install
I'm in Chicago, and I've gotten 3 quotes on a new central AC unit and condenser.
Two of the quotes sat around 6-8k for the HVAC work. Electrical work has not been quoted yet.
But one quote was 16k. He stated that the existing furnace was installed upside down and needed to be replaced. He also stated I need at least 16 SEER and that anything lower would lose efficiency way too fast. About 2.5k of this was including electrical.
Is this furnace installed upside down? And do I really need 16 SEER with heat pump?
Furnace model is RGF19060BE12MP13A