Best Buy: Air Purifier Winix C610 Refurb, $65

Winix C610 refurb for $65. This is the version that they sell at Costco now for $160. Comes with 1 filter. 1 filter lasts for 12 months. This filter has combined activated charcoal and HEPA. Costco version comes with 2 years of filters. Refurbished has 1 year of warranty, whereas brand new has 2 years of warranty $25 flat shipping regardless of # ordered. I ordered 3. Easier to use than the C545/C540s that were being cleared out at $100 at Winix's own store last year and at Princess Auto. These have wifi, ionization, etc. Ionization has it's own button, but it always turns on ionization when you power cycle. Hold it down, and it will turn off. There is a separate button for indicating you've changed the filter. Replacement filters are readily available on Amazon, similar price as filters for the C545. I use generic replacement filters. I.e. slightly different form factor, but essentially does the same thing as all HEPA air filters, and this is the lowest price I've seen by far for a HEPA air purifier with this CADR made by an American/Canadian/European company.