Large PC fan CR Boxes can save a couple hundred dollars per year in electricity and filter replacement cost compared to equivalent large HEPAs
-
70 CADR cfm - 4 fans
Exhalaron - Versatile Personal HEPA - Perfect for Meeting Rooms
Exhalaron - Versatile Personal HEPA - Perfect for Meeting Rooms
NOTE: Only blue-fan variants have colored fans.
Couldn't load pickup availability

Exhalaron - Versatile Personal HEPA - Perfect for Meeting Rooms
Place Exhalaron upright on a desk to bathe in a 99.5% purified air stream, perfect for summertime! Meanwhile Exhalaron provides CDC minimum 5ACH cleaning coverage for small bedrooms and offices, dorms, care rooms, tents, cabins, and vehicles.
2 styles: Basic Brown Hardboard & Blue Bamboo w/ Blue LED SickleFlow fans
The hand-crafted Exhalaron has a special role as conference or dining table centerpiece: the powerful 119 m^3/hr (70 cfm) DUST CADR design captures or redirects most exhalations upward, protecting conversants across the table. Exhalaron is our quietest unit yet, barely audible at full strength beside you on nightstand or table. No other HEPA can match its compact form-factor and gentle double-barrel, quad-fan dispersion: uniquely quiet for peaceful, clean conversations.
Coolest of all, crossed bungees can secure a USBC Power Bank (sold separately) to power the Exhalaron on the run for 6-18 hours! Concerned about medical visits or public transportation without two-way masking? Let Exhalaron be your second layer of protection to substantially lower virus, allergens and pollutants in the vicinity wherever you go!
Exhalaron means unprecedented power, silence & versatility for a personal HEPA!
Inspired by Cross-Table Exhalation Study
Why a double-barrel HEPA? U of Colorado, Donghua & Marriot experiments demonstrated that a 98 CADR cfm purifier on a 4-person table will directly capture about 3/4 of exhalations before they cross the table, reducing virus deposited on occupants up to 95%. Capture was less efficient for an 8' circular banquet table.
We couldn't find any compact HEPAs quiet in this CADR range. CleanAirKits created the double-barrel Exhalaron to silently tackle this scenario.
Compatible Power Banks
USBC Lithium battery packs sold separately. Battery packs should be USBC PD 20W QC 3.0 rated with male USBC pigtail and < 5.9" tall to fit between filter plates, like these:
VRURC T2046 20000mAh - Blue (12 hours)
Charmast C2046S 20000 mAh (12 hours)
NOTE: Blue Lights in blue bamboo style will always be on when fans are powered, so not appropriate for a bedroom. Also, blue lights reduce battery life.
Compatible HEPA Filters
We stock Nyemo H12 grade, Taotronics TT-AP006 compatible filters. H12 grade capture 99.5% of > .5um particles, while H13 "medical grade" HEPA capture 99.97% of > .3um particles (at ~5% lower airflow and CADR than H12). If you prefer H13 grade, see the many brands of TT-AP006 HEPA replacements available on Amazon. Other ~7" diameter HEPA cylinders with flush foam seals will fit, though performance will vary with each brand's pressure drop.
Washable black speaker mesh attractively shrouds the HEPAs without impeding airflow. Four bungees firmly seal the HEPAs against the fan plates -- just unhook them to change the filters.
Fan panels are partially assembled for Exhalaron DIY kits.
While working toward UL507 certification to satisfy CARB air cleaner regulations, only fan kits without filters will ship to California.
Exhalaron hardboard panels do not contain lead, Formaldehyde, or PFAS. However, like cooking, lasercutting can generate trace carcinogens hence:
⚠️WARNING: This product may contain chemicals known to the State of California to cause cancer. www.P65Warnings.ca.gov for more information
-
Full Name2 Arctic P12 + 2 SickleFlow
-
FansArctic P12 & CoolerMaster SickleFlow
-
FiltersTwo HEPA H12 7x7x6" flat seal
-
DUST/Virus CADR by Intertek70.2 cfm (121 m3/hr)
-
5ACH Room Cover105 sq ft
-
Power5.7W
-
Noise40 dB
- Machine-washable speaker mesh filter shroud
- On/off rocker switch under embroidered power icon
- 1 UL-listed AC wall plug to 12V DC barrel plug
- 1 female USBC PD to 12V DC barrel adapter cable
- Dimensions: 15x7.25x8.5"
- Weight: 4 lbs


Unintuitively Quiet
It's dead simple. CleanAirKits deliver top-end portable HEPA performance and they're QUIET. At that performance level, HEPA are not quiet -- people turn them down or turn them off. And we need them to be on and high-performing to passively remove covid and pollutants.The exceptionally large, unencumbered filtration area provided by dual micro pleated 3M Filtretes, and our diffuse banks of silent pressure fans make this possible. Delivering 200-500 cubic feet per minute of clean air means the boxes filter 1000-2000 faster than an adult human breathes!




Always On Safety
Since a Clean Air Kit is not loud and power hungry like a HEPA, it can always be running. And if it's always running, it's always adding a layer of protection for you and your family from smoke & airborne transmission of viruses like Flu, RSV, and Covid.
This corresponds to the pandemic HVAC best practice of continuously running furnace fan circulation with MERV13 or MERV14 filtration.

March 2022: Study of 10,441 Italian Classrooms with
varying mechanical ventilation up to 6 ACH.


-
Quiet on Full
Clean Air Kits produce 5-10x less noise than HEPA purifiers at max capacity.
-
One Speed Design
Speed controls defeat the efficacy of most HEPAs -- people turn them down to quiet where air cleaning slows. We have just one speed: silent full blast!
-
Unprecedented Energy Efficiency
Decades of competition has driven amazing silence + efficiency in PC fans. Our fan banks use 6-16W -- comparable to a LED bulb and easy to run off batteries!

Products are returnable within 30 days for a full refund less $44 filter hygiene cost and shipping. Exchanges to other models with same filter sizes are free except for shipping, otherwise $44 for new filters.
All products ship from Missouri via UPS according to an average rate per product (until backend supports live rates accurately). Due to high demand and customizations products may take up to two weeks to ship.
-
"Standalone HEPAs or Corsi-Rosenthal boxes are a quick way to lower the risk of inhaling SARS-CoV-2 virus. Filtering the virus out of the air reduces the chance of inhaling it---simple logic. The other option is to filter/trap it with a mask before it is released or inhaled."
Kim Prather, PhD
Distinguished Professor, UCSD
Director NSF Center for Aerosol Impacts
on Chemistry of the Environment -
3M tested the Corsi-Rosenthal Box with the same rigor it applies to its Filtrete brand of products and found the C-R Box “performs exceptionally well in its ability to capture unwanted airborne particles, including viruses," says Kelsey Hei, a 3M application engineer.
Fortune: A DIY air purifier that costs
under $100 to make is taking Americas
classrooms by storm -
“A C-R box uses MERV-13 filters, which can only remove 60% to 80% of those particles, (but) the fan on the C-R box is much bigger and can clean more air,” says Joseph Fox, chair of the indoor air quality advisory group with the Ontario Society of Professional Engineers, who works with schools on HVAC issues. “All you care about in the end is the total rate at which the air is cleaned. So, what the C-R box lacks in efficiency, it makes up for in airflow.”
Fortune: A DIY air purifier that costs
under $100 to make is taking Americas
classrooms by storm -
Many exciting innovations have emerged in the last two years alone. Once it is clearly acknowledged the virus is airborne, it becomes a very fixable problem. People will shift from cleaning surfaces to cleaning indoor air where we spend 90% of our time. This has huge positive health ramifications beyond COVID-19 by reducing the spread of all airborne pathogens, pollutants including wildfire smoke, and other asthma-inducing aerosols.
Kim Prather, PhD
Distinguished Professor, UCSD
Director NSF Center for Aerosol Impacts
on Chemistry of the Environment -
To lower inhalation dose of virus-laden respiratory aerosol particles (a major key to suppressing the mortaility and mobidity associated with COVID-19) the three Rs must be advanced from where they are now. Remove, Reduce, Remediate.
Richard Corsi, PhD PE (Texas)
Dean of Engineering, UC Davis -
Appropriate combos of Remove, Reduce, & Remediate are what many of us called layered risk reduction (or layered inhalation dose reduction) back in Spring 2020. Not rocket science. For those who still care about reducing the spread of COVID-19, it all still applies, folks.
Richard Corsi, PhD PE (Texas)
Dean of Engineering, UC Davis -
"I am thrilled to be part of something that is so accessible to people around the world, helping to protect children in school and families in their homes, all the while inspiring children about the power of STEM."
Richard Corsi, PhD PE (Texas)
Dean of Engineering, UC Davis













