Answer
May 31, 2024 - 02:35 AM
This primary filter includes medium particle filter, 6.5 lbs of activated carbon-zeolite blend and True Medical Grade HEPA filter. Replace approx. every 5 years. This filter comes in two colors; black and white. Use black with black and midnight blue air purifiers, and use white for white and sandstone purifiers.When replacing primary filter, use in conjunction with a replacement junior particle pre-filter.    https://www.greenbuildingsupply.com/All-Products/Austin-Air-Replacement-Junior-
Particle-Pre-Filter
        
    
Particle-Pre-Filter

 
                         
                        