Why Choose Us?Our mission is to provide good products and services to our customers and improve the health and wellness of our community with purified air while allowing everyone to get tangible benefits.Product Details1) ? Compatible Models: Perfect Fit for Envion Therapure TPP440 TPP540 TPP640 TPP640S Air Purifier2) Keep Air Fresh and Clean: The Therapure TPP440 TPP540 TPP640 TPP640S Air Purifier is high-efficiency 4-in-1 True HEPA filtration systems. True H13 replacement filter can effectively attach 99.97% of all airborne particles down to 0.3 microns in the air like dust, hairs, pet fur, and lint. And the pleated filter media increases the capture area while maintaining good airflow through the filter. The high-grade activated carbon filter can efficiently absorb unwanted odors, fume, smoke, and cooking smells, as well as filter pet odors in your living space for improved air quality, ideal for pet owners, smokers, and people who live in cities.3) Valuable Packages: Consists of 2 Therapure replacement filters saves a lot of money for your all-year-round air cleaning needs. Higher level filtration performance for long time use, Recommended to replace filters every 3 to 6 months. Using an old filter lowers your air purifier’s efficiency.4) Easy To Install: The replacement filter for Therapure Air Purifier is easy to replace and disposable, no tools are required. For optimum performance, it is recommended to change the filter regularly every 3 to 6 months so as to keep the purifying performance.The Therapure TPP440 TPP540 TPP640 TPP640S Air Purifier Filter Replacement cleans every corner for you to provide the cleanest and most comfortable environment.