AIRx filters are designed and built to the same fit and performance specifications as the original filters that came with your purifier.  The cost savings over the original filters may have some cosmetic differences, but performance and fit are guaranteed, backed by our one year free shipping, free return policy.   

• Carbon Pre-Filter removes excess dust to extend the life of the HEPA filter
• Carbon removes harmful vapors and odors that particle filters can't remove
• Pre-filters should be replaced every 3-6 months as needed based on your environment and run time
• 11" x 15.875" x .25"