Air Purifiers for Home Large Rooms up to 3500 Ft², H13 True HEPA 0.1 Micron 99.97% Filtration with Carbon Filter, 235 CFM CADR, Removes Allergens, Pet Odor, Smoke, VOCs, 30dB Sleep Mode, PM2.5 Display
$149.99
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Product description
1 Air Problems We Solve
2 Smoke & Odors
3 Pollen
4 VOCS
5 Wildfire Smoke
1 3-in-1 Filter
2 Air Quality Display
3 Filter Reminder
4 Why Choose Siesean
5 What Customers Are Saying
1 Air Purifiers for Pets
2 Easy Clean Filter
3 Replacement Filters
1 Ultra- Quiet Air Purifier
2 Smart Control
3 Child Lock
1 Whole-Home Purification
2 Kitchen
3 Living Room
4 Office
5 Basement
Product Dimensions : 10.04 x 10.04 x 18.9 inches; 11.25 Pounds
Item model number : AP-400
Date First Available : October 22, 2025
Manufacturer : Dongguan JHS Electrical Co.,Ltd
ASIN : B0FN2TGQR5
Best Sellers Rank: #24,691 in Home & Kitchen (See Top 100 in Home & Kitchen) #52 in HEPA Filter Air Purifiers
Customer Reviews: 4.8 4.8 out of 5 stars (221) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
H13 True HEPA + Carbon Filter – Removes Odors & Smoke: Equipped with H13 True HEPA (0.1μm, 99.97%) and an activated carbon filter, this purifier helps reduce dust, pollen, pet dander, pet hair, cigarette smoke, wildfire smoke, VOCs, odors, and everyday particulates—ideal for pet owners, and households with smokers
235 CFM CADR + Dual-Sided Airflow – Fast Purification for Large Rooms: The powerful 235 CFM CADR and dual-inlet airflow design deliver 2× faster circulation, cleaning 500 sq.ft in 15 minutes and covering up to 3500 ft². Perfect for large living rooms, open-concept homes, basements, pet activity areas, and offices
Quiet 30dB Sleep Mode – Ideal for Bedrooms & Light Sleepers: Sleep Mode lowers noise to just 30dB, and the dimmer function lets you adjust the panel brightness for comfortable nighttime use. It delivers cleaner air while you rest—perfect for children’s rooms, and pet owners who need overnight odor control
Smart PM2.5 Air Quality Display + Auto Mode – Real-Time Protection: The built-in Air Quality Monitor and PM2.5 digital display provide instant feedback. Auto Mode adjusts fan speed based on air quality—ideal for homes with pets, cooking odors, smokers, and everyday dust
Family-Safe Design – Floor Standing with Timer, Child Lock & Dimmer: Built for daily home use with Child Lock, Timer, and control panel dimmer—safe for kids, pets, and shared living spaces. The floor-standing design fits naturally in homes, living rooms, bedrooms, offices, and new home setups
Independently Tested & Certified → Peace of Mind in Every Use: Independently tested and certified by CARB, DOE, EPA, and UL, this air purifier meets strict standards for clean-air performance, energy efficiency, and electrical safety, with high CADR to reliably filter allergens, pet dander, smoke, VOCs, and odors. Quiet and dependable for daily use in bedrooms, living rooms, pet areas, and large rooms, it offers added peace of mind for homeowners
Filter Maintenance – The filter replacement indicator lets you know when it is time for a new filter, making up keep simple and helping your air purifier run at its best. For consistent performance, replace the filter every 3–4 months based on usage and air conditions. For the best fit and reliable results, use genuine SIESEAN replacement filters by searching B0FVFQQXDR on Amazon
4 reviews for Air Purifiers for Home Large Rooms up to 3500 Ft², H13 True HEPA 0.1 Micron 99.97% Filtration with Carbon Filter, 235 CFM CADR, Removes Allergens, Pet Odor, Smoke, VOCs, 30dB Sleep Mode, PM2.5 Display
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$149.99
•BUNNi• –
Great Home Air Purifer
Air quality has been a big focus in my home lately, so I pay close attention to how a purifier actually performs in real daily use. This one made a noticeable difference in how the room feels after running for a while. The air feels fresher, especially in spaces that tend to get stuffy or hold lingering household odors. It handles larger areas well and does not struggle to keep the air moving.I like being able to check the display and see real time readings since it gives a clear picture of what is happening in the room. It responds when air conditions change, which makes it feel active rather than just running in the background. The fan settings are easy to adjust, and the quieter mode is gentle enough for nighttime without being distracting.The unit feels sturdy and well made, not flimsy or lightweight. Moving it between rooms has been easy, and it does not take up excessive space. Maintenance has been simple so far, and the filter access is convenient.This has become part of my everyday routine because it helps keep indoor air feeling cleaner and more comfortable throughout the day.
@@@Bruins@@@ –
clean air
Good air purifiers small and quiet and convenient. My home’s air quality has been a major concern lately, so I closely monitor a purifier’s performance in actual daily use. After running for a time, this one significantly changed the room’s atmosphere. Particularly in areas that have a tendency to become stuffy or retain residual household odors, the air seems cleaner. It does not have trouble maintaining air flow in larger spaces. H13 True HEPA + Carbon Filter – Eliminates Allergens, Odors, and Smoke: This purifier eliminates dust, pollen, pet dander, pet hair, cigarette smoke, wildfire smoke, volatile organic compounds (VOCs), odors, and common particulates. It is perfect for people with allergies, pet owners, and homes with smokers. 235 CFM CADR + Dual-Sided Airflow — Quick Purification for Big Rooms: The potent 235 CFM CADR and dual-inlet airflow design provide 2× faster circulation, spanning up to 3500 feet and cleaning 500 square feet in 15 minutes. Ideal for offices, basements, pet activity spaces, open-concept houses, and spacious living rooms. Sleep Mode reduces noise to only 30dB, making it perfect for bedrooms and light sleepers. The dimmer feature allows you to change the panel’s brightness for comfortable use at night. It provides cleaner air as you sleep, making it ideal for kids’ rooms, allergy sufferers who need nightly odor control, and pet owners.
Matthew –
Quiet, Effective Air Purifier for Large Rooms and Pet Owners
As a homeowner in Florida, air quality is a big deal for me — between humidity, pollen, dust, and pet dander, it never really lets up. I’ve been running this SIESEAN air purifier in our main living area for a few weeks now, and I’m honestly impressed.First off, it looks clean and modern. It doesn’t stick out like a big appliance, and it’s quiet enough that I forget it’s running — especially on sleep mode. The 30dB setting is perfect at night. No rattling or annoying hum.Performance-wise, it’s made a noticeable difference. We have a dog, and the pet odor is way more controlled. I also wake up less congested, which is saying something during Florida allergy season. The PM2.5 display is a nice touch — it’s reassuring to actually see the air quality improve after cooking or when doors are open.The airflow is strong without being overwhelming, and for a unit rated up to large rooms, it seems to circulate air efficiently in our open-concept space. It also feels solid and well-built, not cheap or flimsy.If you live in a humid, allergy-heavy state like Florida and want something that handles pollen, smoke, and pet smells without sounding like a jet engine, this is a great buy. I’d definitely purchase again.
Noah –
Absolute Monster – Better than my 3 other purifiers combined
I’m an air quality nut and have gone through plenty of units trying to optimize my 120 sq. ft. room, but this is the first one that actually feels like a serious piece of equipment. Most purifiers feel like cheap plastic boxes, but this has real weight and build quality.The actual difference is the dual intake hardware. It uses four filters total – two H13 HEPA and two Carbon filters -scrubbing air from both sides at once. It also hits 0.1-micron particles, which is way more precise than the 0.3-micron standard most other units use.In a bedroom, this is total overkill, but you can’t argue with the results. Even with my other units running, this thing managed to drop the PM2.5 levels down to 13 within minutes of turning it on. It puts out a massive volume of air but stays basically silent on sleep mode. If you want clinical grade air and actual visible results, this is it. 10/10.