Nispira AER1 HEPA Replacement Filter with Carbon Booster for Holmes Air Purifier HAPF30AT-U4R HAP242-NUC Air Purifier Pre-filter helps trap visible dust

Pre-filter helps trap visible dust such as hair

These filters have been approved and certified by USA governmnet FDA and  European ROHS

QUALITY AIR FILTERS: premium HEPA filters and Carbon filters compatible with Holmes and Bionaire air purifiers

rich flavor and low acidity

Drop-in Replacement Application Home Air Purification

Nispira AER1 HEPA Replacement Filter with Carbon Booster for Holmes Air Purifier HAPF30AT-U4R HAP242-NUC Air Purifier Pre-filter helps trap visible dustQUALITY AIR FILTERS: premium HEPA filters and Carbon filters compatible with Holmes and Bionaire air purifiers. HEPA FILTER: HEPA filters remove up to 99. 97 percent of airborne particles as small as 0. 3 microns. Odor and Smoke Removal: Effectively removes odors, smoke, and volatile organic compounds (VOCs) from the air. Each pack has 4 carbon pre filters. Suggest to replace every 3 months the most to optimize the performance Easy to install. Just