Thank you all for the great information and feedback. I will definetly check in to the home audit also. I have 2 more questions.
1. Currently my return air grills are on the bottom of the walls, the contractors say I should move them up towards the ceiling. Then rotate between the two between heating and cooling??
2. Condensate drain location. One contractor was going to pump it over to my sump pump pit, the other 3 said they would run a line to the space along the wall from the floating slab ??
I guess I'm going to want to keep the sun out of the house if I'm trying to cool it. Shades,curtains.