> ## 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.

# Removing VOCs and Formaldehyde from Indoor Air

> What VOCs and formaldehyde are, where they come from indoors, how activated carbon filtration helps, and why ventilation matters too. A practical indoor-air guide.

Volatile organic compounds (VOCs) are gases released by many everyday materials, and formaldehyde is one of the most common. This guide explains what they are, how an air purifier with activated carbon helps, and where filtration's limits are.

## What are VOCs and formaldehyde?

VOCs are carbon-based chemicals that evaporate into the air at room temperature. Common indoor sources include new furniture, paint, flooring, adhesives, cleaning products, air fresheners, and pressed-wood products — the latter being a major source of **formaldehyde**. "New furniture smell" and "fresh paint smell" are largely VOCs off-gassing.

## How does the AirPro reduce VOCs?

The [AirPro](/air-purifier/overview) includes an **activated carbon** stage that adsorbs many VOCs and odors, including formaldehyde, as air passes through. Carbon works by trapping gas molecules on its huge internal surface area — a different mechanism from the [HEPA 14](/air-purifier/hepa-14-filtration) stage, which captures particles. Together they address both particulate and many gaseous pollutants.

## What are carbon filtration's limits?

Carbon is effective but not unlimited. It gradually saturates and needs replacing on schedule, and it does not capture **every** gas — notably radon and carbon monoxide, which require dedicated detectors. Heavy or continuous VOC sources can also outpace any purifier, so reducing the source and ventilating are essential partners to filtration.

## How do I cut VOCs at the source?

* Air out new furniture, rugs, and mattresses before bringing them into bedrooms.
* Choose low-VOC or zero-VOC paints and finishes.
* Ventilate well during and after painting, installing flooring, or assembling furniture.
* Store solvents, glues, and cleaners in a garage or sealed away from living areas.

## When does off-gassing matter most?

Off-gassing is highest when materials are new and tapers over weeks to months. During that window, run the AirPro continuously near the source and ventilate with fresh air. See our [air quality guide](/air-purifier/air-quality-guide) and [cleaner indoor air page](/air-purifier/cleaner-indoor-air-smoke-mold-voc).

<Note>
  An air purifier with carbon helps reduce VOCs and odors, but it works best alongside source control and ventilation. It is not a substitute for fresh air, and it cannot remove carbon monoxide — install a CO detector for safety.
</Note>

<Warning>
  Persistent strong chemical odors, symptoms like headaches or irritation that improve when you leave the home, or a suspected gas leak warrant professional evaluation and proper ventilation — not reliance on an air purifier alone.
</Warning>

**Related:** [How It Works](/air-purifier/how-it-works) · [Air Quality Guide](/air-purifier/air-quality-guide) · [Do Air Purifiers Work?](/air-purifier/do-air-purifiers-work)