A fresh filter on a side table beside an air purifier

Cost and upkeep

What drives cost, owning one, energy use, and filters.

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Two plain air purifiers of different sizes

What drives air purifier cost

Size, filters, energy, features.

An air purifier on a shelf beside a wrapped replacement filter

The cost of owning an air purifier

Filters, power, and upkeep.

A plain air purifier plugged in beside a wall outlet

Air purifier energy use

Electricity and the label.

A used filter and a fresh filter side by side on a worktable

Air purifier filter replacement

When to change a filter.

Start with what drives cost

Size, filters, energy, features.

Read what drives cost

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