Many people don’t stop to truly consider what keeps the air in buildings fresh, clean and free of dust. They may be surprised to discover just how big a role air filters play behind the scenes.  Filters are an unseen, yet very significant part of building performance – so important, in fact, that the technicians at MacDonald-Miller changed out more than 26,000 filters in 2014!  What makes MacMiller so special in this arena is that we house our very own Filter Shop, which is rare for a Mechanical Services Contractor.

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