What Do Air Scrubbers Do?

An air scrubber installs in your ductwork and treats air as it circulates — reducing dust, pollen, and dander, cutting odors, and addressing bacteria, mold, and VOCs. Unlike a passive filter, most use active technology that also affects contaminants on surfaces in the rooms it serves.

How It Differs From a Filter

A filter is passive — it captures what passes through it. An air scrubber uses active technology, typically UV light combined with a catalytic process, that generates purifying agents distributed into the living space. That means it works on airborne contaminants and on surfaces, which a filter cannot do.

What It Addresses

Odors from cooking, pets, smoke, and everyday living — often the most noticeable benefit
Bacteria, viruses, and mold, both airborne and on surfaces
VOCs off-gassing from cleaning products, paint, new carpet, and furniture
Dust, pollen, and dander circulating through the system
Growth on the evaporator coil, which also keeps the coil transferring heat properly

Where It Fits

Air scrubbers are most valuable for odor and VOC problems that filtration cannot touch — pet odors, cooking smells, smoke, or a recently renovated home off-gassing. For straightforward dust and pollen, thick media filtration is the more direct and less expensive tool.

Many homes benefit from both: filtration for particulate, a scrubber for what filtration misses.

The Requirement

Because it works through your ductwork, an air scrubber only treats what your system circulates. If the coil and blower wheel are caked with dust, or return ducts are pulling attic air into the supply, address those first — maintenance and duct sealing often deliver more improvement than added equipment.