Winix C545

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 Oct 23, 2026.

Compatibility snapshot

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: Winix no longer lists a new C545 on its own store. Its air-purifier page now carries only a certified-refurbished C545, and that was out of stock when checked on 2026-10-23, so Amazon is the remaining new channel. The Amazon buy box read $271.95 on 2026-10-20, well above the $189.99 Winix charged direct in September 2026, so check the price before you commit.

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