Costco is offering its members the Dyson Purifier Hot+Cool HP11 Air Purifier, Heater and Fan, model no. 304918-01, for $399.99 (599.99 – 200 instant savings) for a limited time. Shipping adds $9.99 but you should be able to find this same offer in store if you want to bypass shipping. This offer ends November 15, 2026.

The Dyson Purifier Hot+Cool HP11 offers all-season comfort and air purification, fast heating in the winter and powerful cooling in the summer. The fully sealed filter system captures 99.97% of microscopic allergens and pollutants as small as 0.3 microns. The filter is HEPA H13 grade and captures 97% of odors such as cooking odors, pet odors and smoke. It connects to the Dyson app that allows you to monitor your air quality and control it in the app or with a compatible voice services.