Good, genuine company with lots of experience! I used Elite AC to replace an old unit for my grandmothers house. I don't know much about air conditioning so it was good to work with a trustworthy company who matched our needs from a financial standpoint and installed the unit promptly so my grandmother didn't have to deal with the heat. I worked with Joey who explained our options and helped us make a quick and informed decision. My grandmother loved him and asks how he is doing still. I'm happy he took the time to help us and we will continue to use them for any of our AC needs.
Under normal conditions, standard-use residential ducts (HVAC systems) should be cleaned every three to five years. Usage, system age and condition, local air quality, and number of residents and pets can affect cleaning frequency needs. Harsher conditions might require cleaning as often as every two years. Obviously, if your system is not functioning properly or the output air quality is bad, consult a professional sooner rather than later to get a proper diagnosis.