DAYETTE AP309 Air Purifier with H14 HEPA Filter

The DAYETTE AP309 air purifier is specified for rooms up to 2400 sq. ft. and pairs a washable pre-filter with an H14 HEPA filter, automatic PM2.5 sensing, pet mode and an essential-oil diffuser. Its broad room-coverage claim is tied to a stated pet-mode refresh time, so compare the operating mode and room size with your needs.

At a glance

Three-sided intake draws air from the front and both sides, according to the listing.
Pet mode is described as switching directly to maximum fan speed.
A washable pre-filter catches larger particles before the replaceable H14 HEPA filter.
Auto mode adjusts fan speed using the built-in PM2.5 sensor.
The built-in diffuser and sleep-mode fragrance sponge offer optional scent use.

Price

$74.99Save 17%

Reference price: ~~$89.99~~

Price checked: Nov 14, 2026

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Often bought together

AP309 Replacement Filter for DAYETTE & AIRFIRE Air Purifier AP309/AP409 | HEPA Filter with Activated Carbon, 4 Pack (Original Filter)

$39.99

Pros and cons

Pros

Washable pre-filter provides a reusable first stage for hair and larger dust.
PM2.5-based automatic fan adjustment can reduce the need for manual speed changes.
Sleep mode has a stated 22dB noise level, and a lock helps prevent accidental setting changes.
The diffuser adds an optional aromatherapy function alongside filtration.

Cons

The main filter is specified for replacement every 3–6 months, creating an ongoing replacement task and cost.
The product's broad coverage claim is linked to pet mode and a 60-minute refresh time, rather than establishing the same result for every setting or room.

Technical specifications

17 specifications

Coverage and airflow
Claimed room coverage	up to 2400 sq. ft.
Claimed refresh time and mode	within 60 minutes in pet mode
Air intake	front and both sides

Filtration and sensing
HEPA filtration claim	True H14 HEPA filter removes 99.997% of airborne pollutants as small as 0.1 microns
Pre-filter	removable, washable pre-filter
Particle sensor	built-in PM2.5 sensor
Auto-mode ranges	“Bad” (>116 µg/m³) to “Very Good” (0-35 µg/m³)

Modes and controls
Pet mode	instantly activate max fan speed
Sleep-mode noise claim	22dB
Child and pet lock	child and pet-proof lock
Filter reminder	HEPA Light activates when filter needs replacing

Filter care and fragrance
Pre-filter care	Simply rinse or vacuum it monthly
Recommended main-filter replacement	replace the filter every 3–6 months
Fragrance feature	built-in diffuser
Sleep-mode fragrance feature	fragrance sponge

Dimensions and installation
Dimensions listed	6 x 10 x 14.5 inches; 5 pounds
Model	AP309

What to know before buying

The claimed coverage is up to 2400 sq. ft. with air refreshed within 60 minutes specifically in pet mode. The listing gives no equivalent timing for other modes, and room conditions may affect how useful that coverage claim is for your space.
The listing says the pre-filter can be rinsed or vacuumed monthly and recommends replacing the main filter every 3–6 months. It also says to use authentic DAYETTE filters. Verify the correct replacement filter for AP309 before purchase.

Who is it for?

A good fit for

People with pets who want a high-speed mode and a washable pre-filter for hair and larger particles.
Buyers who prefer sensor-based automatic fan adjustment and a displayed PM2.5 reading.
Bedrooms where a stated 22dB sleep mode and optional fragrance function are useful.

Less suited to

Shoppers seeking a purifier with no recurring filter replacement requirement.
Buyers who need a verified room-cleaning rate at a mode other than pet mode.

DAYETTE AP309 Air Purifier with H14 HEPA Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 1,232 ratings

5 stars76%76%
4 stars13%13%
3 stars5%5%
2 stars1%1%
1 star5%5%

Customer feedback highlights quiet operation, perceived air-quality improvement, and appreciation for the air-quality indicator, fan settings and remote control. Some customers also report allergy or respiratory benefits, but these are personal reports rather than established outcomes. For buyers considering this model, the reported quietness and automatic sensing are relevant to bedroom use, while the listing's 22dB sleep-mode figure and PM2.5 auto mode are product claims, not proof of individual results. The overall rating distribution is mostly five-star but includes a smaller lower-star share, so experiences are not uniform.

Positive themes

Customers report quiet operation and improved perceived air quality.
Feedback appreciates the air-quality indicator, fan settings and remote control.
Some customers report allergy or respiratory improvement.

Frequently asked questions

How large a room does the DAYETTE AP309 cover?

The listing claims coverage up to 2400 sq. ft. and says it refreshes air within 60 minutes in pet mode. It does not provide the same timing claim for other modes.

Does the AP309 have a washable filter?

Its pre-filter is removable and washable, with monthly rinsing or vacuuming suggested. The listing separately recommends replacing the main filter every 3–6 months.

How does auto mode work?

A built-in PM2.5 sensor monitors particle levels, and the purifier is described as adjusting fan speed automatically as air quality changes.

Can the AP309 add fragrance?

Yes. The listing describes a built-in diffuser for essential oils and a fragrance sponge for sleep mode.