Airthereal AGH400 Replacement Filter | Glory Days Pet Air Purifier | H13 HEPA + Activated Carbon or Pet Deodorizing

The filter is what defines the AGH400 — this is the replacement, built to the same standard as the original.

Every AGH400 runs on one of two filter configurations, and this replacement is available in both. The H13 option pairs true HEPA filtration, capturing 99.97% of particles down to 0.3 microns, with an activated carbon layer for general odors and harmful gases. The Pet Deodorizing option keeps the same H13 HEPA core but swaps in a third layer engineered specifically for cat urine, litter box odor, dander, and the allergens a standard carbon filter handles less effectively. Both are available as a single filter or a 2-pack, so the order can match the household's actual replacement schedule.

Replacement is straightforward: unplug the unit, rotate the top counterclockwise and lift it off, rotate the bottom cover to access the old filter, and swap in the new one. Reassemble, power on, and hold the Filter Button for 3 seconds to reset the reminder. The AGH400 tracks this for you — the Filter light turns red at the 3,500-hour mark, or roughly every 6 to 8 months of typical use. Increased noise, decreased airflow, and a visibly clogged filter are the earlier signals worth watching for.

Product details:

• Compatibility: Airthereal Glory Days AGH400 Pet Air Purifier — this model only
• Filter options: H13 HEPA + Activated Carbon, or H13 HEPA + Pet Deodorizing
• H13 HEPA core: 99.97% of particles to 0.3 microns, both configurations
• Pet Deodorizing layer: engineered for cat urine, litter box odor, and dander
• Available in single-filter and 2-pack quantities
• Replacement interval: every 6-8 months, or when the Filter light turns red
• Reset: hold Filter Button for 3 seconds after installation

Why we love it:

• Same H13 HEPA standard as the original unit — no drop-off in filtration between replacements
• Pet Deodorizing option is a purpose-built third layer, not a generic carbon filter doing double duty
• Choose the quantity that matches your replacement schedule — single filter or 2-pack
• Built-in Filter light removes the guesswork on when to change it
• Simple twist-and-lift replacement process — no tools required

Native Manor Note: The AGH400 is only as good as the filter inside it. This replacement keeps that standard intact — the same H13 HEPA core, and the choice between general odor control or the Pet Deodorizing layer built for what a pet home actually generates. Order the quantity that fits your schedule, with no compromise on the reason the unit was purchased in the first place.