Message from Matt Mongiello (Vice President)
It is amazing to me that I still meet with people who believe that air distribution systems (both residential and commercial) do not get dirty. Many mistakenly believe that ventilation systems are pristine when installed, or believe that filtration will stop everything. Or simply believe that it is less expensive to replace an HVAC component rather than clean and maintain it.
Since 1990, I have seen thousands of buildings and dwellings with significant ventilation issues including particulate accumulation, insulation deterioration and mold growth. These issues cause measurable problems in air flow, system efficiency and indoor air quality.
While the following photographs are by no means the worst, they are certainly a representative sample of what we see every day in ventilation systems.