Fine print :

• ** Buy 1 air purifier get 1 free filter kit. Mixing and matching purifier and filter models is permitted. Free filter kit cannot be a subscription item. Discount applied automatically in cart. Shipping fee not waived for the free filter kit to addresses outside the 48 contiguous states, such as Canada, Hawaii, Alaska, and Puerto Rico. If an air purifier is returned without the filter kit, the filter kit's price will be deducted from the refund.
• *** Subscription discount will also be automatically applied to all future recurring orders.
• Cannot be combined with any other promotions not listed above.
• Sale ends Tuesday 4/22/2025.