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HEPA Negative Air Machines for Hazardous Material Abatement
What Makes a Negative Air Machine "HEPA"
HEPA stands for High Efficiency Particulate Air — a filtration standard requiring 99.97% capture efficiency for particles 0.3 microns in diameter, the most penetrating particle size for fibrous filters. Asbestos fibers, the primary hazard in abatement work, range from 0.1 to 10+ microns; the thin, respirable fibers under 3 microns that cause mesothelioma and asbestosis are well within the HEPA capture range. A HEPA-certified negative air machine exhausts air that has passed through a true HEPA final filter — meaning the air leaving the machine and entering the building exterior is effectively free of asbestos fibers, lead dust particles, and mold spores at concentrations that pose a health risk. Non-HEPA machines with standard filters allow these particles to pass through the exhaust.
HEPA Negative Air Machines vs. Standard Air Scrubbers
Negative air machines and air scrubbers both use HEPA filtration, but they perform different functions in an abatement project. Negative air machines exhaust filtered air to the outside of the containment, creating negative pressure — air flows in through gaps in the poly containment rather than out, preventing fiber migration to adjacent spaces. Air scrubbers recirculate room air through the filter without exhausting outside, reducing airborne particle concentrations but not creating negative pressure. For Class I asbestos work and most regulated abatement requiring negative pressure containment, HEPA negative air machines are the required equipment; air scrubbers are used in addition for general air quality control or in scenarios where negative pressure is not required by the abatement specification.
Related collections: negative air machines, air scrubbers, Abatement Technologies, asbestos removal equipment, flood and dust management
Sizing HEPA Negative Air Machines for Your Containment
EPA and OSHA guidelines for asbestos abatement require a minimum of four air changes per hour inside the containment, with some specifications requiring six or more for high-fiber-generation tasks. To calculate required CFM: multiply the containment volume in cubic feet by the required air changes per hour, then divide by 60 to get the required CFM. A 10,000 cubic foot containment at four air changes per hour requires 667 CFM minimum — achievable with a single 1,000 CFM machine with headroom for duct losses and filter loading. Use multiple machines for larger containments or when redundancy is required; a single machine failure must not shut down the abatement project entirely on occupied building jobs.
Frequently Asked Questions
Let customers speak for us
Nice compact scrubber/vacume
Nice compact scrubber/vacume. Works very well.
corner Cottage
Tornado Microburst TS040-W17-U Compact Floor Scrubber – 17.5" Path, 435 RPM, 67 dB
Fast shipping Great
Fast shipping Great Experience
Brian Swails
Sandia 10-0401-I Internal Hose & 4" Clear View Hand Tool Kit – 7 ft
Great
Great product
Anonymous
Sandia Gen-Air 90-0000 Commercial Air Mover – 2,400 CFM, 3-Speed, 1/2 HP, Stackable
Mosquito carbon-lite
This vacuum is very light and powerful
Austin Domnitz
Mosquito America Carbon-Lite HEPA Backpack Vacuum 06-1060-ST – 152 CFM, 9.8 lbs, Quad HEPA
Reliable Suction Power
Gets the job done without hassle. This vacuum is powerful and reliable for everyday cleaning. Definitely recommend it.
Ron P.
Bissell BG99 Economy ProShake 12" Upright Vacuum – 600W, 30 ft Cord
Good choice for pets
we have three cats, and this purifier has done wonders in removing pet odors and dander
sarah w.
AllerAir AirMedic Pro 6 Plus Air Purifier – 22 lb Carbon, Super HEPA
Brio Air Filtration = Game Changer
Located in the Twin Cities in Minnesota, we acquired our Brio Air Filter in mid-late Spring of this year (2023) when pollen count was high and we were beginning to experience the effects of Poor Air Quality Index as a result of smoke particulates from fires in Canada that caused the air in much of Minnesota to become hazy and simply dirty.
It is so easy to share our experience with the Brio Air Filter given how quickly and efficiently it removed pollen, dust, and smoke particles from the environment inside our home. Two people in our home who suffer from pollen-related allergies during the spring immediately experienced easier breathing and elimination of symptoms within the house. With respect to smoke particulates from Canada drifting into our environment, EVERYONE in our home experienced directly improved breathing and smell of the air when entering from outside.
An additional piece of information to account for is that we have always employed high grade furnace filters in our home’s central HVAC system. With that high grade filtration in place both prior to and after acquiring a Brio home air filter, we all quickly agreed that deploying the Brio in our home made an easily noticeable positive difference in breathing inside our home. Additionally, those of us who clean our home have observed that dust builds up slower on our floors and furniture than before we deployed the Brio unit.
We did note that the Brio is not as quiet as a few other brands/models on the market that we have tried in our home but the efficiency and quality of the filtration, along with the air turnover rate it provides,allows us to locate the Brio unit in central rooms away from the bedrooms. Since we made that change there has been no noise-related effect on our sleep, while the unit maintains the same level of air cleanliness throughout our home.
A last key point to make is how easy the Brio unit is to maintain. The simplicity of the modular construction of the Brio unit makes it very quick and easy to keep the filtration sections clean. We have not yet reached a point of filter replacement but it is obvious to us that the replacement will take a matter of seconds and can be executed by anyone in our home, including our 10-year-old son.
Bernie V.
Brio 550 Air Purifier – APART 0.01 Micron, 267 CFM, 24-Month Filter
Works wonders
this bedroom purifier has transformed my sleep quality. the air is so much fresher and cleaner worth every penny
mike t.
Austin Air Bedroom Machine - B402B1 - Indoor Air Quality
love the backpack
perfect for maneuvering in tight areas the HEPA filter is a huge bonus
sofia m.
Mosquito America Carbon-Lite HEPA Backpack Vacuum 06-1060-ST – 152 CFM, 9.8 lbs, Quad HEPA
Bedroom machine
It seems to help reduce my allergy issues. We're glad we bought it. The only problem I had was not seeing any cubic footage recommendations in the online description when purchasing the unit. Bedrooms vary widely in size!!
Anonymous
Austin Air Bedroom Machine - B402B1 - Indoor Air Quality
Reliable and Powerful
This vacuum has exceeded my expectations. It's super powerful and handles daily cleaning with ease. I recommend it to everyone.
Mike L.
Bissell BGUPRO12T Pro 12" Upright Vacuum – 1000W, 105 CFM, 48 ft Cord
effective sweeper
really effective in sweeping up all kinds of debris from our warehouse floor
j.c.
Bissell 38" Push Power Sweeper
powerful and compact
works wonders on tough carpet stains. it's compact and easy to use for upholstery cleaning too
rachel d.
Mosquito America 12G-1202 Carpet Extractor – 400 PSI, Dual 6.6" 2-Stage Motors