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The AirPro’s HEPA 14 filter is designed to last 6-12 months depending on usage and air quality conditions. The built-in smart tracking indicator takes the guesswork out of replacement timing, and the subscription option saves money while extending your warranty to lifetime coverage.

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When to Replace the Filter

The AirPro’s smart lifetime tracking system monitors actual filter usage and will alert you when replacement is needed. General guidelines:

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Signs Your Filter Needs Replacement

  • The smart tracking indicator signals replacement
  • Noticeable decrease in airflow
  • Persistent odors that the purifier no longer removes
  • Increased noise at the same fan speed (motor working harder against a clogged filter)
  • Visible discoloration or debris on the filter surface

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How the Smart Tracking Indicator Works

The AirPro does not use a simple timer to estimate filter life. The smart tracking system monitors:
  • Cumulative run time across all speed settings
  • Air quality conditions that accelerate filter wear
  • Fan speed patterns — higher speeds process more air and load the filter faster
When the indicator signals replacement, the filter has reached the point where efficiency begins to decline. Replacing the filter promptly ensures you continue getting HEPA 14 performance.

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Replacement Filter Pricing

Purchase replacement filters at SonoHealth.

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Filter Subscription

The AirPro filter subscription delivers replacement filters automatically and includes significant benefits:

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Subscription Details

  • 20% off every filter — Applied automatically to each shipment
  • Shipped every 90 days — A fresh filter arrives before you need it
  • Lifetime warranty — Your AirPro is covered for as long as the subscription is active, compared to the standard 2-year warranty
  • Cancel anytime — No long-term commitment
The subscription is especially valuable for households running multiple AirPro units. A 4-pack home with the subscription saves over $60 per year on filters while maintaining lifetime warranty coverage on all units.

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What the Replacement Filter Includes

Each replacement filter is a complete 3-stage assembly:
  1. Pre-Filter — Captures large particles (dust, hair, pet fur)
  2. HEPA 14 Filter with Antibacterial Coating — Medical-grade filtration at 99.995% efficiency
  3. Activated Carbon Layer — Removes VOCs, odors, and chemical fumes
  4. Antimicrobial Layer — Prevents microbial growth on the filter
All four layers are integrated into a single replaceable unit for easy installation.

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Pre-Filter Maintenance

While the full filter assembly is replaced every 6-12 months, you can extend its life with regular pre-filter maintenance:
  • Vacuum the pre-filter every 2-4 weeks to remove accumulated dust and debris
  • Use a soft brush attachment to avoid damaging the filter media
  • Do not wash the HEPA 14 or activated carbon layers — water damages the filter media and destroys efficiency
  • Check for visible buildup monthly, especially in homes with pets or during high-pollen seasons
  • Clean more frequently during wildfire smoke events or construction nearby
Regular pre-filter maintenance prevents large particles from reaching the HEPA 14 layer prematurely, allowing the main filter to focus on the fine particles it is designed to capture.

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How to Replace the Filter

  1. Turn off and unplug the AirPro
  2. Remove the outer housing per the user manual instructions
  3. Remove the used filter assembly
  4. Insert the new replacement filter, ensuring proper orientation
  5. Reassemble the housing
  6. Plug in and turn on the AirPro
  7. The smart tracking system resets automatically with the new filter

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Proper Filter Disposal

Used HEPA 14 filters contain captured pollutants, allergens, and potentially biological material. Dispose of used filters in a sealed bag with your regular household waste. Do not attempt to wash, vacuum, or reuse the HEPA 14 or activated carbon components.
Related: Product Overview · HEPA 14 Filtration · Smart Features