News — Indoor Air Quality

Why Dust Keeps Coming Back in Offices and Schools, and What HVAC Filtration Has to Do With It Dust has a way of returning. A desk gets wiped down on Friday. By the middle of the following week, there is already a light coating on the surface. The same thing happens on conference tables, classroom shelves, window ledges, computers, and around ceiling vents. It is easy to blame the cleaning schedule. Sometimes that is part of it. But recurring dust can also be a sign that particles are continuously entering the building, being generated indoors, or moving through the ventilation...