You should at leas expect the thermostat to be securely attached to the wall and the controls are working properly. Ask the owner to show you where the filter is located. This will show you how difficult it is to get to the winter and summer seasons. You should find out who is responsible for changing it, you or the landlord. Cooling Equipment Air conditioning is another major contributor to your annual energy bill.
Air conditioners operate just like heat pumps in that they move heat from the inside to the outside.
An air conditioner's efficiency is determined by its mechanical design with newer models being more economical than older ones. Besides age, air conditioner efficiencies are affected by how well they've been maintained, so it is a good idea to take a look at the cooling unit of a prospective rental. The outside condenser should be sitting on a level surface, free of foliage that may block air flowing into it. Check the finned heat exchanger that surrounds the condenser to make sure the fins are aligned and clean. What you want is equipment that is in good shape with unobstructed airflow.