Airpura C400DLX Air Purifier: VOCs, Chemicals & Gases
Model: C400DLX
SKU: arp-ap-us1708
CARB Certified: Approved for sale to California
Zoom InCarb
Free Shipping
Airpura C400DLX air purifier covers up to 1,000 sq ft (depending on model and speed) and is the perfect choice for odors, airborne chemicals, and VOCs like TCE, PCE, SO2, NO2, highway exhaust fumes, VOG, and more. Top-quality purification like the C400, but now with a special blend of carbon (DLX) to adsorb even greater concentrations of chemicals and VOCs. Strong airflow and dwell time in a small, compact, portable unit. Excellent for VOCs, forest fires, and VOG.
Featuring: 12 lbs of impregnated carbon along with a HEPA-Barrier (not a medical-grade HEPA)
If you loved the larger C700DLX, then you will love the newer C400DLX model designed for smaller spaces.
The Airpura C400DLX is a compact, all-metal air purifier built to reduce heavier concentrations of airborne chemicals, VOCs, gases, and odors. It holds 12 lbs of Airpura's DLX carbon, a special impregnated blend with potassium iodide that adsorbs a broader range of chemicals than standard activated carbon. That makes the C400DLX a strong choice for smaller spaces dealing with TCE and PCE, sulfur gases, nitrogen dioxide, highway exhaust, and volcanic gases (VOG). It 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.
DLX Carbon for Heavier Chemical Loads
The DLX blend is what sets this unit apart. Potassium iodide acts as an oxidizer that helps the carbon bind chemicals quickly, so the C400DLX can handle higher concentrations of chemicals and VOCs than units with standard carbon. Airpura's carbon blends are formulated to adsorb over 4,000 airborne chemicals and VOCs. Three fan speeds (low, medium, and high) let you slow the airflow for longer dwell time in the carbon bed, which improves adsorption when chemical levels are high.
HEPA-Barrier: Built for Chemicals First
Like Airpura's other C, T, and DLX models, the C400DLX uses a HEPA-Barrier post filter rather than a medical-grade True HEPA. Most of the space inside the unit is dedicated to carbon, so the HEPA-Barrier captures 95% of particles at 1 micron instead of 99.97% at 0.3 microns. If ultrafine particles are your main concern, a True HEPA unit is the better fit. If chemicals, gases, and odors come first, the C400DLX gives you more carbon where it counts.
C400DLX vs. C400: What's the Difference?
Both units share the same compact 400-series housing, motor, pre-filter, and HEPA-Barrier. The difference is the carbon. The C400DLX uses Airpura's DLX impregnated blend to adsorb greater concentrations of chemicals and VOCs, while the Airpura C400 is a good fit for lighter chemical loads at a lower price.
Sizing Your C400DLX
At high speed, the C400DLX delivers about 2 air changes per hour in 1,000 sq. ft. with 8-foot ceilings. How many air changes you need depends on you and your space, since every person and situation is different. Some clients just want a healthier living space, while heavier contaminants, or contaminants coming in quickly, usually call for more air changes, often 10–12 ACH in heavy VOC or smoke areas. The goal is for the unit to clean the air faster than contaminants are coming in. If VOCs are your goal, size the unit on medium speed so contaminants pass through the carbon more slowly. If you need high air changes in a small room, adding another 400-series unit or choosing a 600 model works better than a 700-series unit, which can draw its own clean air back in. You can check your own room with our Air Changes per Hour Calculator. For larger spaces, the Airpura C700DLX offers the same DLX approach in a bigger unit. For heavy tobacco or cigar smoke, take a look at the Airpura T400DLX.
At a Glance
Coverage: Up to 1,000 sq. ft. at 2 ACH, depending on speed
Carbon: 12 lbs DLX impregnated carbon with potassium iodide
Particle filtration: HEPA-Barrier, 95% at 1 micron (not medical-grade HEPA)
Pre-filter: 361 sq. in. x 1" deep
Delivered CFM (post-filters): 40 low / 200 medium / 260 high
Noise: 32 dB low / 52 dB high (room level 30 dB)
Size: 15.5" high x 12" wide
Power: Max 69 watts, 0.6 A, standard 110V
Fan speed: 3-speed (low, medium, high)
Casters: Not available
Housing: All metal, available in white or black, with neoprene gaskets (felt available on request)
Warranty (residential): 5 years parts, 10 years labor
Warranty (industrial/commercial): 2 years parts, 5 years labor
Made in: Canada
Estimated Maintenance
Filter
Service Interval
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
Typically every 12 months; some clients change it every 18–24 months, depending on usage
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 C400DLX pairs 12 lbs of Airpura's DLX impregnated carbon with a HEPA-Barrier post filter in a compact, all-metal housing. It's designed for heavier concentrations of airborne chemicals, VOCs, gases, and odors in smaller spaces.
Technical Specifications
Coverage: Up to 1,000 sq. ft. at 2 air changes per hour (ACH), 8-ft ceilings, on high
Usage: Heavier concentrations of VOCs, chemicals, gases, and odors
Dimensions: 15.5" H x 12" W
Pre-Filter: 361 sq. in. x 1" deep
Carbon: 12 lbs DLX impregnated carbon blend with potassium iodide
HEPA-Barrier: 95% effective at 1 micron (not medical-grade HEPA)
Sound Level: 32 dB low, 52 dB high (typical room level is 30 dB)
Voltage: Standard 110V
Power: 69 watts max, 0.6 A
Housing: All-metal; available in white or black
Gaskets: Neoprene; felt available on request (custom made for the unit, so ship time may be longer)
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? Every person and situation is different. Some clients just want a healthier living space, while heavier contaminants, or contaminants coming in quickly, usually call for more air changes. Heavy VOC or smoke areas may even call for 10–12 ACH. If VOCs are your goal, calculate on medium speed. Try our Air Changes per Hour Calculator or give us a call at (888) 231-1463.
If the C700DLX is too large for your space, the C400DLX is an excellent option.
Ideal for smaller spaces with:
TCE and PCE
Sulfur gases (SO2)
Nitrogen dioxide (NO2)
Ammonia
Highway exhaust fumes
Heavy acrylics and art studio fumes
Volcanic gases (VOG) and volcanic eruptions
Forest fires
Homes and workplaces near manufacturers that release chemicals from their processes
Families who want clean, healthy air at home
Areas with poor outdoor air quality
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 from Many Air Purifier Companies
Airpura air purifiers are built differently from many units on the market, with a focus on clean construction, deep filtration you can customize, and long-term durability.
Clean Construction
All-metal housing: Powder-coated steel instead of plastic, so no plastic vapors are emitted.
Motor out of the airflow: Many air purifiers blow the clean air over the motor, where it can pick up impurities. Airpura keeps the motor out of the airflow.
Electrical parts in a sealed chamber: Kept away from the airflow, which increases safety and prevents off-gassing.
Pressure-sealed filter chamber: Airpura’s unique pressure seal keeps air from slipping around the filters, so it passes through them.
Neoprene gaskets: Seal the filter chamber, with felt available on request (custom made for the unit, so it may lengthen ship time).
Deep, Customizable Filtration
Deep activated carbon beds: Up to 26 lbs of activated carbon, depending on model, with airflow and bed depth calibrated for proper contact time.
Carbon options: On carbon models, the standard carbon can be swapped for V, F, S or anthracite carbon for an additional charge, to target specific chemicals.
HEPA options: True HEPA or HEPA Barrier, depending on the model; H14 SuperHEPA on the 414, 614 and 714 models; and a 100 sq. ft. True HEPA on the I series, the largest HEPA in the Airpura line.
UV and PCO options: UV germicidal lamps on the UV series, TitanClean photocatalytic oxidation with UV on the P series, and a UV upgrade on the I series.
Power and Control
Delivered airflow (after the filters): Estimated from low to high. Delivered airflow varies with each filter configuration.
400 series: 40–260 CFM
600 series: 100–412 CFM (366–412 CFM on high, depending on model)
700 series: 88–450 CFM
Speed control: Three speeds on the 400 series and variable speed on the 600 and 700 series.
Superior dwell time: The integrated impeller/motor, speed control and unimpeded airflow let you set the airflow precisely, so the air gets the time it needs with the filters.
Built to Last
Warranty on residential units: 5 years parts and 10 years labor.
Warranty on industrial/commercial units: 2 years parts and 5 years labor.
Made in: Canada.
Whole home options: R, V, UV, P, C and I models are also available as whole home units, installed by your local HVAC specialist.
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 C400DLX uses Airpura\'s DLX impregnated carbon blend, so its adsorption ratings are higher than those shown. Other impregnated-carbon units include the C700DLX, T400DLX, V400, 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 C400DLX, perform even better.
Estimated Maintenance
Filter
Service Interval
Standard pre-filter
Typically every 6–12 months, depending on use
TarBarrier pre-filter
About monthly in public places; less often in homes, depending on how much smoking takes place
Carbon filter
Up to 2 years, depending on usage and contaminants
HEPA-Barrier
Every time the TarBarrier is changed in public places; typically every 12 months in homes
HEPA or SuperHEPA
2–5 years max, depending on usage and contaminants
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.
Free Shipping
Airpura C400DLX Filter Bundle: 400 Prefilter, C-DLX Carbon, HEPA Barrier with Frame
$409.94 $329.98
Free Shipping
Airpura HEPA Barrier Filter Fits C400 C40DLX T400 T400DLX G400DLX F400DLX S400DLX with Frame
$79.98 $69.98
Free Shipping
Airpura 400 Prefilter -2 pack: FITS 400 Series
Starting at $44.98
Free Shipping
Airpura Carbon Filter C400DLX / T400DLX Proprietary Impregnated Carbon Blend
$299.98
Free Shipping
Airpura C400 Air Purifier Airborne Chemicals
$669.98
Free Shipping
Airpura C700DLX Air Purifier VOCs, Airborne Chemicals, Gas
Starting at $1,249.98