Airpura S400DLX SuperGas Air Purifier: Focus on VOCs & Formaldehyde
Model: S400DLX
SKU: arp-ap-us1739
CARB Certified: Approved for sale to California
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The Airpura S400DLX air purifier covers up to 1,000 sq ft and traps formaldehyde, airborne chemicals, and VOCs with its extra-large bed of enhanced, impregnated activated carbon, plus particles 1 micron and larger with its HEPA-barrier filter. It is a super-enhanced chemical abatement unit. Some of the prime chemicals it filters, which can cause moderate to severe health issues such as headaches, drowsiness, and rhinitis, include formaldehyde, ammonia, pesticides, benzene, acid gases, toluene, VOCs, and much more.
Featuring: 12 lbs of impregnated carbon along with a HEPA barrier (not a medical-grade HEPA).
SuperGas is a proprietary carbon blend designed for the widest spectrum of VOCs, including but not limited to formaldehyde.
The Airpura S400DLX is a compact, high-powered air purifier built to reduce formaldehyde, airborne chemicals, VOCs, gases, and odors. It holds 12 lbs of Airpura's SuperGas carbon, a proprietary hybrid blend that targets formaldehyde like the F-series and adsorbs a wide range of other VOCs and chemicals like the V-series. Formaldehyde, ammonia, pesticides, benzene, and toluene are some of the most common indoor chemicals linked to headaches, drowsiness, and rhinitis, and they're often released by new furniture, pressed wood, flooring, and other modern building materials. The S400DLX covers up to 1,000 sq. ft. at 2 air changes per hour (ACH), depending on fan speed, and runs as quiet as 32 dB on low.
SuperGas Carbon: The Best of the V and F Series
Most carbon blends are built for one job. Airpura's F-series carbon is designed to target formaldehyde, while the enhanced carbon in the V400 & V414 covers a wide range of VOCs and specific chemicals. SuperGas is a hybrid of the two. It reduces formaldehyde like the F-series and also adsorbs the broader range of chemicals the V-series handles, making the S400DLX a strong all-around choice when you're dealing with formaldehyde plus other chemicals from new furniture, flooring, renovations, or nearby industry. Airpura carbon blends adsorb over 4,000 airborne chemicals and VOCs.
What's in SuperGas Carbon?
SuperGas is Airpura's proprietary carbon blend, so we can't share the exact ingredients or amounts. For our MCS clients, we can tell you that it contains potassium permanganate (a smaller percentage than the F400DLX), zeolite, and potassium iodide. If you're sensitive to any of these, please contact us before ordering so we can help you choose the right unit.
Why a HEPA Barrier Instead of True HEPA?
Airpura's C, T, and DLX models give most of their filter space to carbon for VOC, gas, and odor adsorption. To make room for the deeper carbon bed, the S400DLX uses a HEPA barrier that is 95% effective at 1 micron instead of a medical-grade True HEPA canister, which is 99.97% effective at 0.3 microns. The HEPA barrier still captures larger particles, but the S400DLX is designed for situations where chemicals are the main concern rather than ultrafine particles.
S400DLX vs. S400: What's the Difference?
Both units use Airpura's SuperGas carbon, the same compact all-metal housing, and the same motor. The difference is how the filter space is divided between carbon and particle filtration.
S400DLX – 12 lbs of SuperGas carbon with a HEPA barrier (95% at 1 micron). Best when formaldehyde, VOCs, gases, and odors are the main concern.
S400 – 8 lbs of SuperGas carbon with a medical-grade True HEPA filter (99.97% at 0.3 microns). Best when fine particles matter as much as chemicals.
Sizing Your S400DLX
At high speed, the S400DLX delivers about 2 air changes per hour in 1,000 sq. ft. with 8-foot ceilings. The number of air changes you need varies widely, and there are many rules of thumb. For example, clients with allergies or asthma often aim for 3–7 ACH, while areas with heavy VOCs or smoke may even call for 10–12 ACH. The right number for you depends on what the contaminant is, how heavy it is, how quickly it's coming in, how much filtration you want, and your own sensitivities.
When formaldehyde and other VOCs are your main concern, size the unit on medium speed so air passes through the carbon more slowly, and make sure it can clean the air faster than the source releases chemicals. You can check your own room with our Air Changes per Hour Calculator, or contact us, and we'll help you find the right fit.
If you're aiming for more air changes in a small space, it may be tempting to choose a 700-series unit. In very small areas, though, a 700 can sometimes create a vortex effect. That means the unit can draw its own clean air back in instead of moving air through the whole room. To reduce that risk, we recommend more than one S400DLX or a 600-series model instead. For larger spaces, the Airpura S700DLX offers the same SuperGas focus with more capacity.
At a Glance
Coverage: Up to 1,000 sq. ft. at 2 ACH, depending on speed
Warranty (residential): 5 years parts, 10 years labor
Warranty (industrial/commercial): 2 years parts, 5 years labor
Made in: Canada
Estimated Maintenance
Pre-filter
Clean every 3–6 months, change every 6–12 months
Carbon filter
Up to 2 years, depending on usage and contaminants
HEPA barrier
Every 12 months
Note: Filter maintenance is based on standard usage and average contaminants. Depending on your situation, filters may need to be changed more or less often.
Specifications
The Airpura S400DLX is a compact, all-metal air purifier built for chemical-focused filtration. It pairs 12 lbs of Airpura's SuperGas carbon, a proprietary hybrid blend for formaldehyde, VOCs, specific chemicals, gases, and odors, with a HEPA barrier that captures particles 1 micron and larger.
S400DLX Specifications
Coverage
Up to 1,000 sq. ft. at 2 air changes per hour (ACH), 8-ft ceilings, on high
Usage
Formaldehyde, VOCs, specific chemicals, gases, and odors
Dimensions
15.5" H x 12" W
Weight
27 lbs
Housing
All metal, oven-baked powder coat; white or black
Pre-Filter
361 sq. in. x 1" deep
Carbon Bed
12 lbs SuperGas enhanced impregnated carbon blend
Carbon Blend Contents
Proprietary; contains potassium permanganate (less than the F400DLX), zeolite, and potassium iodide
Neoprene; felt available on request (custom made, may add to ship time)
Fan/Motor CFM (Pre-Filters)
395 CFM
Delivered CFM (Post-Filters)
40 CFM low, 200 CFM medium, 260 CFM high
Fan Speed
3-speed (low, medium, high)
Sound Level
32 dB low, 52 dB high (typical room level is 30 dB)
Voltage
Standard 110V
Power
69 watts max, 0.6 A
Casters
Not available
Certifications
ETL certified (conforms to CSA C22.2 No. 113, ANSI/UL 507); CARB certified for sale in California
Warranty – Residential
5 years parts, 10 years labor
Warranty – Industrial/Commercial
2 years parts, 5 years labor
Made In
Canada
Not sure how many air changes your space needs? It depends on your contaminants and how quickly they enter the space, so every situation is different. Try our Air Changes per Hour Calculator or give us a call at (888) 231-1463.
If the S700DLX is too large for your space, the S400DLX is an excellent option.
Ideal for smaller spaces with:
Formaldehyde
Pressed wood
New furniture
New polyurethane floors
Renovations or remodeling with new carpet
Acid gases
Ammonia
Benzene
Toluene
Pesticides
Chlorine
PVC VOCs
Air fresheners and perfumes
Pet odors
Forest fires
Lead abatement
Volcanic gases (VOG)
Workplaces and industries that release chemicals from manufacturing processes
Homes near manufacturers that release chemicals from manufacturing processes
Individuals with Multiple Chemical Sensitivities (MCS) who tolerate small amounts of potassium iodide and potassium permanganate
Families who want clean, healthy air at home
Areas with poor outdoor air quality
Locations near agricultural operations
These are just some of the uses for this unit. Many contaminants are a good fit for more than one unit, so if you\'d like help finding the best one for your needs, please contact us.
Many factors come into play when choosing an air purifier, including the contaminants, coverage (enough air changes for the level of off-gassing), how quickly things are off-gassing, particulate matter, and your own sensitivities. The uses above are suggestions. Air purification isn\'t a black-and-white science, and things outside our control, like humidity or where the unit is placed, affect results. We wish there were one unit for every need, but there are always trade-offs, like sound versus power and budget versus filtration.
Don\'t hesitate to ask, especially if your contaminant levels are high.
Airpura Difference
Unique Features that make Airpura Different than Many Air Purifying Companies
All Metal Housing - No plastic vapors are emitted
Motor out of the air flow - Many air purifiers blow the clean air over the motor and pick up impurities
Electrical parts in a sealed chamber away from the airflow - Increases safety and prevents off-gassing
Fan/Motor CFM (PreFilters): 395 CFM
Delivered CFM (PostFilters): 40 CFM on low, 200 CFM on medium, and on high 260 CFM. CFM will vary with different configurations.
Variable speed control - Offers you flexibility
Proper contact times for effective filtration - Correctly calibrated air flow / bed depth for efficient adsorption
Pressure sealed filter chamber - Unique pressure seal on the filter chamber ensures all contaminants are filtered and cannot escape
Warranty on Residential Units: 5 yrs parts and 10 years labor
Warranty on Industrial/Commercial Units: 2 yrs parts and 5 years labor
Made In: Canada
Neoprene gasket seal the filter chamber - Maximize filtration with no rubber off-gassing
Clean modern appearance - Fits in any decor
Low noise level - 32 db on low at 6 ft and 52.0 on high
SuperiorDwell Time: The 395 CFM impeller/motor combined with the variable speed control and unimpeded airflow of the Airpura 400 series allows the airflow to be set precisely and achieve maximum results.
The 4-series allows our clients not only to enjoy the same high-quality filtration as the 7-series configurations but just in a smaller, compact unit.
Download the Airpura Activated Carbon Adsorption Ratings (PDF) – These ratings are for standard activated carbon against common chemicals and VOCs. Not every tested compound is listed, so if you have a specific concern, contact us, and we\'ll check with Airpura\'s chemist. The S400DLX uses Airpura\'s SuperGas enhanced, impregnated carbon blend, so its adsorption ratings are higher than those shown. Other impregnated-carbon units include the V400, S400, C400DLX, F400, and F400DLX.
Download the Airpura KCL Test Report (PDF) – Testing was performed on the Airpura 600 series with standard activated carbon. Units with impregnated carbon, including the S400DLX, perform even better.
Estimated Maintenance
Pre-filter
Clean every 3–6 months, change every 6–12 months
Carbon filter
Up to 2 years, depending on usage and contaminants
HEPA barrier
Every 12 months
UV lamp
Not applicable
Note: Filter maintenance is based on standard usage and average contaminants. Depending on your situation, filters may need to be changed more or less often.
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