Unfortunately, as we know from the previous post,  dirty unit ventilators are very common in School Districts throughout Chester County.  We have performed cleaning in many schools in Chester County and Delaware County. In many cases, the school had a very good overall maintenance program, but did not include regular unit ventilator cleaning. In just…

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Most schools have Air conditioning and Heating units which serve each classroom. These units are called Unit Ventilators, or abbreviated  “Univents”. They are also known as “PTAC” Units, which is an acronym for Packaged Terminal Air Conditioners . Unit ventilators are normally installed along the exterior window wall (as shown),  so that “fresh air” can…

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