*40% Off sale is applicable to the following air purification systems only: Airoclean™420 MAX, Airoclean™ 420 XL and Airoclean™ 420 Home. Offer is limited to two units per Customer Account. Only United States-based customer accounts are eligible. While supplies last. To be eligible, Quote Forms or product consultation requests must be received by Sterilumen™, Inc. between Monday, December 5, 2022, 7 am EDT and Wednesday, December 28, 2022, 11 PM EDT. Airoclean™ 420 Home products can also be purchased directly online https://airoclean420.com/airo-home-hobby-grow/. To be eligible for the 40% discount, Airoclean® orders must be submitted by January 31, 2023, 11pm EDT. The purchaser is responsible for all shipping charges and taxes. Cannot be combined with any other offers or applied to past purchases. Terms and conditions apply.