Austin Air Warranty Information To activate your warranty, please be sure to register your air purifier and its filters with Austin Air. Austin Air’s 30-day no-questions-asked warranty is redeemable via Crystalline Home Environment, with proof of purchase and the returned unit. Due to the coronavirus, we can not accept returned air filters. Refunds will be granted as soon as the air purifier is received by us. After 30-days, please seek warranty coverage directly with Austin Air, based on the registration of your units. Austin Air’s generous 5-year warranty covers the air purifier unit and a pro-rated 5-year warranty for the air filters. Due to the coronavirus, Austin Air currently cannot accept returned air filters. Thank you for your kind understanding. Thank you for your patronage. We look forward to serving you.