Air purifier filters act as the device’s ”protective masks,” trapping germs, allergens, and pollutants to deliver clean air. But just like a used mask, filters get dirty over time and lose effectiveness—making timely replacement crucial for your health.
Why Regular Filter Replacement Matters
Prolonged use clogs filters with dust, bacteria, and debris, increasing air resistance. A worn-out filter not only reduces purification efficiency but also risks secondary pollution. It may even cause the purifier to produce louder noise as it struggles to circulate air through blocked layers.
How to Tell When to Replace Filters
● Check color and condition: HEPA filters need replacement if they turn dark gray or black (especially the back of H11+ grade filters or front of F9- filters). Activated carbon filters should be changed if they emit sour/rotten odors or fail to absorb smells like secondhand smoke.
● Test purification performance: Use PM2.5 or formaldehyde detectors to compare inlet and outlet pollutant levels. Replace filters if PM2.5 removal drops below 50% or if odors linger longer (e.g., from smoking) or allergy symptoms worsen.
● Monitor airflow and noise: Noticeably reduced airflow or louder operation often signals a clogged filter.
● Follow lifespan reminders: Use the purifier’s indicator light or app alerts as a reference, adjusting for pollution levels in your environment.
Important to Choose a Good Filter Material
Choosing a good filter also requires good filter materials, such as Jofo Filtration’s Air Filtration Materials, the surface fiber diameter of this fabric is smaller than that of ordinary materials, the surface area is larger, the pores are smaller, and the porosity is higher, which can effectively filter harmful particles such as dust and bacteria in the air, and can also be used as automotive air conditioners, air filters, and engines air filter material. Jofo Filtration is committed to research, develop, and manufacture the high-efficiency air purification materials, provide stable and high-performance filter materials for the global air purification field.
Typical Filter Lifespan
Pre-filter: 3–6 months (replace more frequently in heavily polluted areas).
Activated carbon filter: 3–6 months (change sooner if exposed to strong odors or high formaldehyde levels).
HEPA filter: 6–12 months (up to 2–3 years in clean environments).
Photocatalyst filter: 3–6 months (recommend replacement every six months).
Don’t let a dirty filter turn your air purifier into a pollution source. Regular replacement ensures you breathe safe, clean air year-round.
Post time: Nov-07-2025
