> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sonohealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How Much Does It Cost to Run an Air Purifier?

> What an air purifier costs to run continuously, how electricity use and filter replacement add up, and how to keep ongoing costs low.

Air purifiers work best running continuously, so a common question before buying is what that does to your electric bill. For most modern HEPA purifiers, the answer is reassuringly little — the bigger ongoing cost is filters.

<Note>
  Energy use varies by model, fan speed, and local electricity rates, so treat these as general guidelines rather than exact figures for any one home.
</Note>

## Is it expensive to run an air purifier 24/7?

Generally no. Consumer air purifiers draw modest power, especially on lower and night settings, so running one continuously typically adds only a small amount to a monthly bill. Higher fan speeds use more energy than [Night Mode](/air-purifier/smart-features), so a unit that runs quietly and efficiently at low speed keeps costs down.

## What about filter replacement costs?

Filters are usually the larger ongoing expense. The AirPro's HEPA 14 filter lasts roughly [6–12 months](/air-purifier/filter-replacement) depending on air quality and runtime, and [replacement filters](/air-purifier/filter-replacement) are priced from \$29.99 for a single pack. A [filter subscription](/air-purifier/filter-replacement) takes 20% off and ships every 90 days, and it includes a lifetime warranty.

## What makes filters wear out faster?

Heavy use during events like [wildfire smoke](/air-purifier/wildfire-smoke-guide), homes with [multiple pets](/air-purifier/for-pets), heavy dust, or running on the highest setting all shorten filter life. The AirPro's smart tracking estimates remaining filter life so you replace it on time rather than guessing.

## How do I keep total running costs low?

* Run on a lower or Night Mode setting when air quality is good.
* Clean the **pre-filter** regularly so the main filter lasts longer.
* Use a [subscription](/air-purifier/filter-replacement) to save on filters.
* Size the unit to the room so it doesn't run flat-out — see [room coverage](/air-purifier/room-coverage).

## Total cost of ownership

When you add modest electricity to periodic filter changes, a HEPA 14 purifier is an inexpensive long-term investment in indoor air quality — often less than the recurring cost of allergy medication. Compare the math in our [cost breakdown](/air-purifier/best-air-purifier-under-200).

***

**Related:** [Filter Replacement](/air-purifier/filter-replacement) · [Smart Features](/air-purifier/smart-features) · [Room Coverage](/air-purifier/room-coverage) · [Best Air Purifier Under \$200](/air-purifier/best-air-purifier-under-200)