Correct the cause of uncomfortable rooms
For Fair Oaks service, describe changes in room temperature, airflow and operating noise separately. A room that is always uncomfortable can need a different solution from a system that recently stopped producing heating or cooling.
Replacement planning should include the return path, filter arrangement and accessible duct condition. If equipment is in a tight service area, discuss access and maintenance clearances before selecting a physically larger replacement.
For air conditioning repair, bring room comfort and installation clearances into the scope discussion. A limited electrical or control repair may be reasonable when the rest of the system is serviceable. Coil leakage, compressor damage or repeated failures warrant a written comparison with matched replacement. Ask what is included in each option and what remains unchanged.