AC units should have return air also, not just the supply ducts like many heat only systems. 

Thanks All, @Marcus Auerbach I was too heated at the time.

Tenant is responsible for making sure filters in the heating and AC unit are changed regularly; and to make sure heat is not below 60F during the winter.Here's the listing: https://www.realtor.com/reales... 

Not sure what kind of climate the property is in, but paying for part or all of your tenants' utilities can get expensive, since they have no reason not to (for example) run the heat full-blast with the windows open in January. 

Typically there are laws about the property being maintained in a habitable condition with a limited time frame required to complete habitable related repairs, i.e. electrical, plumbing, heating, cooling, ...As a property manager, I agree with you that there seems to be "a lack of quality assurance" as well as a lack of communication and sense of responsibility from your PM. 

I moved to Miami about a year a half ago, and I'm renting an apartment here.

Items needing repair and/or replacement may include: roof, hot water heater, plumbing, heating and air conditioning unit, etc.

The homes are cheaper to heat and cool, but also so much more comfortable in general.Another thing to add is that I would be installing and wiring these panels.

Gas heat. 

A heating system is going in.