Name: FreAire KN-6391RGB
Brand: FreAire

Last verified: Aug 22, 2026

Aug 2026

Quick verdict

The FreAire KN-6391RGB is best suited to rooms where published specs can be checked against your space. Buyers should separately evaluate filter cost and maximum-speed noise before deciding.

Consider alternatives if

You need a verified maximum-speed noise figure
Filter replacement interval or cost is a deciding factor

Verified limitations or missing information

Maximum-speed noise is not in our sources
Filter replacement interval is not verified
Smoke CADR is not published

FreAire KN-6391RGB overview

The FreAire KN-6391RGB is an air purifier.

Claimed coverage: 1086 sq ft
Last verified: Aug 22, 2026

FreAire KN-6391RGB CADR and room size

Our recommended room size uses approximately 4.8 air changes per hour with an eight-foot ceiling. Manufacturer coverage figures may use a lower air-change rate and are shown separately.

FreAire KN-6391RGB noise level

A model-specific minimum dB figure is not in our sources.

Maximum-speed noise is not in our sources.

FreAire KN-6391RGB filtration

Filter type is not confirmed for this model.

Filter replacement interval is not verified in our sources.

FreAire KN-6391RGB smart features

3 ambient lights

FreAire KN-6391RGB specifications

Manufacturer claimed coverage: 1086 sq ft

About FreAire air purifiers

FreAire models in this catalog are compared by CADR, recommended room size, noise, and filter type.

See all FreAire air purifiers

FreAire KN-6391RGB comparisons

What is the CADR of the FreAire KN-6391RGB?

CADR is not published for this model in our sources.

What room size is the FreAire KN-6391RGB suitable for?

Recommended room size cannot be derived because CADR is missing.

How loud is the FreAire KN-6391RGB?

A model-specific minimum dB figure is not in our sources.

Does the FreAire KN-6391RGB have Wi-Fi?

No published Wi-Fi or app control in our sources.

What filter does the FreAire KN-6391RGB use?