Air Sentry 300
Short Description
Only the Freshest Air
Don’t settle for anything less than crisp, clean air. The UltraLux Air Sentry 300 delivers powerful multi-stage filtration to a 300-square-foot space — no matter where you live.
The Air Sentry 300 is designed to capture and reduce:
- Dust and pet dander
- VOCs and PM2.5 particles
- Smoke and airborne particles
- Common household odors
With the Air Sentry 300, air in your space is cycled approximately every 10 minutes through a True HEPA 13 filter that captures 99.97% of particles 0.3 microns or larger.
Fresher air. Noticeably cleaner. You’ll feel the difference.
Availability: In stock (can be backordered)
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Why Indoor Air Quality Matters
Let’s face it — our indoor spaces aren’t always as fresh as we’d like. Dust, pet dander, smoke, odors, and VOCs from everyday household items can build up over time, leaving rooms feeling stuffy or stale. Studies show the average person spends about 90% of their time indoors, which means the air inside your home, office, or workspace really matters. The good news? Fresher air is easier to achieve than you think.
Introducing the Air Sentry 300
Ready to refresh your space? The UltraLux Air Sentry 300 is here. Designed to give you the comfort and ease of noticeably cleaner air, the Air Sentry 300 combines powerful multi-stage filtration with faster air cycling — giving you fresher air, faster.
The Air Sentry 300 provides filtered air to a space of approximately 300 square feet — perfect for bedrooms, living areas, and office spaces. Air in your room is cycled approximately every 8 minutes, so you can notice the difference quickly.
When you bring the Air Sentry 300 into your space, you can enjoy:
- Reduction of dust and pet dander
- Fewer airborne particles floating around
- Noticeably fresher-smelling air
- A cleaner, more comfortable environment
Powerful, Multi-Stage Filtration
If you want cleaner air at home or work, the Air Sentry 300 makes it easy. With a high-performance HEPA filter, activated carbon filter, UV-C light component, and an intuitive interface — it’s an easy “yes.”
The Air Sentry 300 includes:
- 99.97% particle capture rate
- 1,500 hours of filter life
- 8-minute air cycling time
- Easy-to-use interface
- Simple filter replacement design
Triple Filtration Technology
Traditional air purifiers rely on a single filter. The UltraLux Air Sentry 300 goes further — combining three filtration stages for a more thorough approach:
- Activated Carbon Filter — helps reduce common household odors and VOCs
- True HEPA 13 Filter — captures 99.97% of particles 0.3 microns or larger
- UV-C Light Component — included as part of the internal filtration chamber design
As an added bonus, we include a True HEPA 14 filter free with your purchase — capturing 99.997% of particles 0.1 microns or larger for even finer filtration.
With the Air Sentry 300, you can capture and reduce:
- VOCs
- PM2.5 particles
- Dust
- Pet dander
- Pollen
- Smoke
- Household odors
This multi-stage system is designed to help your space feel fresher, cleaner, and more comfortable — cycle after cycle.
Long-Lasting Filter Life
The Air Sentry 300 filter is built to last up to 1,500 hours of use — and replacing it couldn’t be simpler:
- Remove the used HEPA filter
- Replace with a new Air Sentry 300 HEPA Replacement Filter
- Rotate and lock the filter in place
- Enjoy fresher air for another 1,500 hours!
Low EMF Design
Many air purifiers on the market include WiFi connectivity and other features that increase EMF output. At UltraLux Health, we intentionally designed the Air Sentry line without those features. The Air Sentry 300 has an ultra-low EMF rating of just 2 Milligauss at 6 inches on the highest fan speed — so you can enjoy powerful filtration with a minimal EMF footprint.
Choose Your Filter Mode
The Air Sentry 300 offers multiple fan speed settings to fit your preferences:
- Automatic / Low / Medium / High — adjust based on your airflow and sound preferences
- Sleep Mode — dims the display and lowers noise to a whisper-quiet 30–33 decibels
- Child Safety Lock — keeps your settings secure
- Air Quality Indicator — a simple red, yellow, and green light display shows current air quality status in your space
| Product Size | 8.3 inches x 11.7 inches |
|---|---|
| Weight | 4.6 lbs |
| HEPA Filter Rating | H13, H14 |
| Rated Power | 24 Watts |
| Noise | 33-51 decibels |
| Filtration Type | True HEPA 13 and 14, Activated Carbon, UV-C Sanitation, Pre-Filter |
5 reviews for Air Sentry 300
Other UltraLux Products
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harvey taylor –
We feel the air is much cleaner in our home. The noise from the air sentry 300 is minimal. After a short period of time you don’t know it’s there.
We are very happy we found your company.
Shannon McLean (verified owner) –
Ordered this unit for some peace of mind after a mold remediation. Quiet small unit that is nicely portable. Great customer service in response to some questions I had ahead of ordering. And fast delivery! Impressed with its ability to sense toxic air like smoke from the stove.
Doris Brown –
I’m more than satisfied with all of the units-I liked them so much I bought the bundle so all of our different size rooms would be taken care of. This 300 is small enough that I take it with me to my other home in the summer, to put in my bedroom for clean air. I just keep the box and travel with this one, best decision I ever made.
Nathan Romansky (verified owner) –
Nice unit for a bedroom or office. Very quiet will not even notice it. In a dark room you can see the glow of the UV light, just place out of straight visual range if using in a bedroom at night. Nice sized unit for sq ft it covers.
annlabar –
Perfect size for our small bedroom and hubby’s office. I have a different filter in the living room that kicks in high gear when it senses it needs more filtration. I’ve never noticed this Sentry doing it. I would expect it would kick in high gear after we shower and there’s a distinct musty smell. I hope it’s filtering out any mold. I assume it is because the Sentry, with the fan going in the bathroom as well, tends to eliminate that musty odor. Customer service is excellent – always very quick to respond to emails. Thanks!