Nispira 182550 HEPA + Activated Carbon Replacement Air Filter — Compatible with Bionaire BAP536UV-U & Holmes HAP537UV/2141139 Air Purifiers Item Package Quantity:3 Periodic replacement is recommended depending

Periodic replacement is recommended depending on water quality and usage conditions

Suggested to clean every 2-4 weeks and replaced every 2-3 months

3 microns and activated charcoal layer absorbs airborne and unfavorable odors

for most households

Nispira 182550 HEPA + Activated Carbon Replacement Air Filter — Compatible with Bionaire BAP536UV-U & Holmes HAP537UV/2141139 Air Purifiers Item Package Quantity:3 Periodic replacement is recommended dependingNispira replacement filter designed for the Bionaire BAP536UV U and Holmes HAP537UV 2141139 air purifier models. This filter serves as a replacement for Bionaire part 182550 and installs easily as a direct fit option. The HEPA layer is engineered to help reduce fine airborne particles, while the integrated activated carbon layer helps minimize common household odors and VOCs. Each set includes: 1 HEPA filter with an integrated activated carbon layer