Most occupants of a commercial building or patients in a hospital have never seen the inside of an HVAC air handler.
Cleanliness of these areas is very important though. When in a modern building, all of the air you are breathing in passes through the air handler. Naturally, you would want it to be clean.
Unfortunately, this is not the fact most of the time. From my own experience in looking at interiors of air handlers where your air goes through, I would have to say that a good 50% of air handlers have mold and deposits on their cooling surfaces and condensate collection pans.
I have witnessed several hospitals with the skeletons of dead animals (birds, lizards, etc). In hospitals with recirculated air, it is possible that some germs may alight on, and grow on, cooling coils. In one major hospital, a swab was taken from the coils and some strange, uncommon microbes were found on the coils.
Other than wanting to breathe in clean air that has not passed through and around mold and other germs, keeping the interior clean of biological matter is important just from an energy standpoint.
Layers of microbes, called biofilms, act as an insulator on cooling coils, and retard heat transfer. There is evidence, published in the ASHRAE journal, that a reduction of up to 40% occurs because of dirty coils alone.
So, yes, keeping the interiors of HVAC air handlers clean is quite helpful, not only for the occupants, but also financially.
You can find out more on Fast Attack HVAC System Sanitizer by going to our company website at http://www.cleanac.com/fast-attack
Lynn Burkhart is the founder and president of Controlled Release Technologies, Inc. located in Shelby, North Carolina. More information about the company, and its products, can be found at http://www.cleanac.com and by calling (800) 766-9057.