air purifier

Winix C545

Winix

budget local: poor Wi-Fi

Price: $245.91 verified Sep 5, 2026
HA fit: poor
Works offline: no
Setup: easy
Hub needed: no

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Quick verdict

Budget 4-stage True HEPA + PlasmaWave purifier with a built-in air-quality LED and a maintained community HA integration for speed and mode control. Not local: control and status route through the Winix cloud, but it has an actively maintained community HA integration, which most cheap purifiers lack. It leans on the manufacturer cloud, so it's here mainly as a fallback when local options run short.

Notes last checked Jun 2, 2026.

Compatibility snapshot

Home Assistant poor

Apple Home none

Google Home good

Alexa good

Works offline partly / no

Setup easy

Extra hub needed no

Power AC mains

Why it stands out

Inexpensive and AHAM-rated for rooms up to 360 sq ft
Maintained community integration exposes fan speed, mode and AQI
Real-time auto mode with onboard particulate sensor

Reasons to hesitate

Cloud-only: integration authenticates against Winix's cloud
PlasmaWave ionizer that some users disable
No Matter or Thread

Best for

Budget-conscious buyers wanting smart purification with HA visibility
Small-to-medium bedrooms

Avoid if

you want fully local control with no cloud account

Privacy and local-control notes

Not local: control and status route through the Winix cloud. It earns a place here because it has an actively maintained community HA integration, which most cheap purifiers lack.

Home Assistant support: supported · integration path: iprak/winix (HACS).

Buying reality check

Price notes: $189.99 direct from Winix, which includes two full sets of filters (verified 2026-09-05). The Amazon listing is a marked-up third-party offer at $245.91 quoting an 8-9 day ship time, so buy it from Winix unless Amazon's buy box changes hands.

Verified price reads: lowest seen $189.99, latest $245.91 on Sep 5, 2026.

Sep 5, 2026$245.91amazon-3p
Sep 5, 2026$189.99winix-direct

Compare side by side: see air purifier comparisons →

Verified against

Integration source on GitHub (integration, local) · checked Sep 6, 2026
Manufacturer page (protocols, spec) · checked Sep 6, 2026

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