Negative Air Machine Rental
HEPA negative air machines and HEPA vacuums that hold negative pressure inside containment — keeping mold, asbestos, and demolition dust from escaping the work area. Same-day delivery across NJ, NY, CT, PA & FL.
Restoration Equipment Supply rents HEPA negative air machines (variable to 750 CFM, 99.97% at 0.3 microns), ducting and HEPA vacuums for mold, asbestos and lead containment. Size them with CFM = volume × air changes per hour ÷ 60. Same-day delivery and 24/7 dispatch across NJ, NY, CT, PA, NC, SC and FL.
- Desiccant Dehumidifiers
- LGR Dehumidifiers
- Air Movers
- HEPA Air Scrubbers
- Portable Air Scrubbers
- Negative Air Machines
- HEPA Vacuums
- Generators
What a Negative Air Machine Rental Does
A negative air machine rental gives you a HEPA-filtered blower that pulls air out of a sealed containment and exhausts it — usually ducted outside — so the pressure inside the work area stays lower than the surrounding space. That negative pressure means air only flows into the containment, never out, which keeps mold spores, asbestos fibers, lead dust, and demolition debris from spreading to clean areas of the building. It's the core engineering control for compliant mold and abatement work.
Mechanically it's the same HEPA machine as an air scrubber — the difference is how you set it up: exhaust ducted outside creates negative air; exhaust returned to the room simply scrubs. We also rent HEPA vacuums for the final surface cleanup, and pair containment gear with our desiccant dehumidifiers when a wet loss also needs aggressive drying. Size the number of machines by the air changes your containment needs; start with our calculator and we'll confirm.
Negative air machine vs. air scrubber: what’s the difference?
A negative air machine and a HEPA air scrubber are usually the same box; what changes is where the exhaust goes. Exhaust ducted out of the containment creates negative pressure; exhaust returned to the room only cleans the air.
| Factor | Negative air machine | HEPA air scrubber |
|---|---|---|
| Exhaust | Ducted outside the containment, usually outdoors | Returned into the same room |
| Pressure | Holds the work area below surrounding pressure | No pressure change (neutral) |
| Main job | Stop contaminants escaping to clean areas | Reduce airborne particles in the space |
| Typical use | Asbestos, lead and mold containment; hospital and occupied-building work zones | Post-remediation air cleaning, dust and smoke, general water-loss air quality |
| Setup | Sealed poly containment, duct, pressure checked with a manometer | Freestanding, often no duct |
| Filtration | HEPA, 99.97% at 0.3 microns, behind a pre-filter (same machine either way) | |
| Example rentals | Abatement Technologies Predator 750 (200–750 CFM), Abestorm FilteAir HEPA V1 (270–750 CFM) | Dri-Eaz DefendAir HEPA 500, Phoenix Guardian R, B-Air RA-650 |
Need room-air cleaning only? See HEPA air scrubber rental and portable air scrubber rental.
HEPA Negative Pressure Control
Duct the exhaust outside and the machine holds your containment under negative pressure — the same units double as scrubbers when you need clean air instead.
- Holds negative pressure so contaminants can't escape the containment
- True HEPA filtration captures mold, asbestos, lead, and demolition dust
- Ductable exhaust and stackable units to reach required air changes
- HEPA vacuums available for final surface cleanup and clearance
How many negative air machines do I need?
Negative air machines are sized by the air changes per hour your containment requires.
Measure the Containment
Length × width × ceiling height gives the cubic feet of the sealed work area you must keep under negative pressure.
Set Target Air Changes
Remediation and abatement commonly target 4–6+ ACH. Multiply volume by target ACH and divide by 60 for the CFM you must exhaust.
Match Machine CFM
Divide required CFM by each unit's ducted CFM to get the machine count. Start with the calculator and we'll verify.
Required CFM = containment volume (cu ft) × target air changes per hour ÷ 60. Divide that by one machine’s CFM and round up. The EPA and IICRC S520 call for negative pressure on larger mold containments, and asbestos specifications commonly require at least 4 air changes per hour; many contractors run 6 or more during active removal.
Size to the airflow a machine actually delivers through its duct and a loaded filter, not the label. If the duct run is long or has several bends, add a machine.
| Containment | Volume | CFM at 4 ACH | CFM at 6 ACH | Machines at 6 ACH |
|---|---|---|---|---|
| Closet or bathroom 10 × 10 × 8 ft | 800 cu ft | 53 | 80 | 1 |
| Bedroom 20 × 15 × 8 ft | 2,400 cu ft | 160 | 240 | 1 |
| Basement or office 40 × 30 × 10 ft | 12,000 cu ft | 800 | 1,200 | 2 |
| School wing or floor 100 × 50 × 12 ft | 60,000 cu ft | 4,000 | 6,000 | 8 |
Run your own room in the air scrubber (ACH) calculator — the math is identical for negative air — then call us to confirm machine count, duct and filters.
Negative Air Applications
- Mold remediation containment and clearance
- Asbestos and lead abatement (with proper protocol)
- Sewage and Category 3 water cleanup
- Fire and smoke damage restoration
- Demolition and renovation dust containment
- Isolating a work zone in an occupied building
- Odor and contaminant control during teardown
- HEPA vacuum cleanup for surfaces and final wipe-down
24/7 Emergency Dispatch
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Same-day emergency delivery. A real person answers, never a machine.
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- Same-Day Emergency Delivery
- Delivered, Set & Monitored
Negative air for asbestos, lead and mold abatement
Each contaminant has its own rulebook. Negative air is the common engineering control that keeps the work area from leaking into the rest of the building.
Asbestos
OSHA’s construction asbestos standard (29 CFR 1926.1101) lists negative pressure enclosures as a control for removal work. In K–12 schools, the federal AHERA rule governs asbestos management. Project specs commonly call for at least 4 ACH and a pressure differential around −0.02 inches of water column, checked with a manometer.
Lead
Lead-safe work falls under EPA’s Renovation, Repair and Painting (RRP) rule for pre-1978 homes and child-occupied facilities, and OSHA’s lead standard (29 CFR 1926.62). RRP cleanup requires a HEPA vacuum; negative air is commonly added for larger interior jobs.
Mold
EPA’s commercial mold guide recommends full containment with negative pressure for areas over 100 contiguous square feet, and IICRC S520 sets the remediation standard of care. Fix the moisture source and dry the structure too — see mold remediation equipment rental.
Negative air containment in New York
New York asbestos projects follow NYS Industrial Code Rule 56 (12 NYCRR Part 56), and work in the five boroughs also follows NYC DEP asbestos rules. Your licensed abatement contractor or project monitor sets the exact air-change and pressure requirements; we supply the negative air machines, duct, replacement HEPA filters and HEPA vacuums to meet them, with same-day delivery across New York and New Jersey.
What a containment rental package includes
- HEPA negative air machines, 200–750 CFM variable — the Predator 750 daisy-chains up to 5 units on one 15 A circuit
- Lay-flat or flexible exhaust duct to reach a window or exterior wall
- HEPA vacuums for cleanup: Nikro 15-gallon stainless dry HEPA vac, Nikro 10-gallon wet/dry, Pullman Ermator S26 dust extractor
- HEPA air scrubbers for adjacent rooms and post-removal air cleaning
- Dehumidifiers and generators when the containment is wet or the building has no power — see water damage equipment rental and, for large buildings, commercial dehumidifier rental
Compliant Containment, On Site Fast
We stage HEPA negative air machines, ducting, and fresh filters across five states so your containment passes inspection.
Same-Day Delivery
24/7 dispatch across NJ, NY, CT, PA & FL. See your service area →
NORMI & IICRC
Mold-inspection and restoration certified, AHERA trained, BBB A rating, family-owned since 2015.
Filters & Ducting
Fresh HEPA filters and duct with every unit. Contact us to spec a containment.
Related Equipment Rentals
Air Scrubbers
The same HEPA machines, run to scrub room air instead of exhausting outside.
See Air Scrubber Rentals
Portable Air Scrubbers
Grab-and-go HEPA for confined spaces inside the containment.
See Portable Scrubbers
LGR Dehumidifiers
Control moisture inside containment while negative air holds pressure.
See LGR Rentals
Build a Package
Get an instant equipment recommendation for your whole job.
Open the Sizing CalculatorNegative Air FAQ
What is a negative air machine?
It's a HEPA-filtered blower that pulls air out of a sealed containment and exhausts it, usually through ducting to the outside. That keeps the containment at lower pressure than the surrounding space, so air flows only inward and contaminants like mold, asbestos, and dust can't escape to clean areas.
Negative air machine vs. air scrubber — what's the difference?
It's the same HEPA machine used two ways. Duct the exhaust outside and it creates negative pressure (negative air). Return the exhaust into the room and it simply cleans the air (air scrubber). One unit can do both jobs depending on setup.
How many negative air machines do I need?
Size by air changes per hour: multiply the containment's cubic volume by your target ACH (often 4–6+), divide by 60 to get required CFM, then divide by each machine's ducted CFM. Our calculator and team confirm the count.
Do negative air machines need to be ducted outside?
To create true negative pressure, yes — the exhaust should discharge outside the containment (typically outdoors). If you only need to clean room air without holding negative pressure, run the same unit as a scrubber with the exhaust returning to the space.
Do you deliver negative air machines same-day?
Yes, with ducting and fresh filters. We stage units across New Jersey (all 21 counties), New York, Connecticut, Pennsylvania, and Florida with 24/7 dispatch. See your service area →
Where can I rent a negative air machine?
Restoration Equipment Supply rents HEPA negative air machines from Piscataway, NJ with 24/7 dispatch and same-day delivery across New Jersey, New York, Connecticut, Pennsylvania, North Carolina, South Carolina and Florida. Call (973) 685-4030 or request a quote.
Where can I get temporary containment and negative air units for an abatement project?
Rent the negative air units, exhaust duct, replacement HEPA filters and HEPA vacuums from us for the length of the project, delivered to site. Tell us the containment dimensions and required air changes and we’ll size the machine count. Abatement contractors typically supply their own poly sheeting and critical barriers.
Do you rent portable negative air machines?
Yes. Our negative air machines are portable: the Abatement Technologies Predator 750 weighs about 35 lbs and the Abestorm FilteAir HEPA V1 about 40 lbs, and both run on standard 115–120V power.
Can I rent a 5,000 CFM negative air machine?
Large containments are usually built from several 750 CFM machines rather than one giant unit — seven of them give about 5,250 CFM. Multiple units also keep the containment negative if one filter loads up or a machine is moved.
Do you rent HEPA air scrubbers?
Yes. HEPA air scrubber rental includes Dri-Eaz DefendAir HEPA 500, Phoenix Guardian R, AlorAir PureAiro, XPOWER and B-Air units, all rated 99.97% at 0.3 microns. See air scrubber rental.
Do you serve negative air containment jobs in New York?
Yes — we deliver negative air machines, duct and HEPA vacuums across New York, including New York City, with 24/7 dispatch. See service areas →
How much does it cost to rent a negative air machine?
Cost depends on the number of machines, rental length, and delivery distance, with lower weekly and monthly per-day rates. Contact us for a free quote.
Updated October 2026 · Reviewed by the Restoration Equipment Supply dispatch team
Negative air machine rental is sized to the job by our dispatch team, so you rent what the loss needs and nothing extra.
Questions about negative air machine rental? Call (973) 685-4030 and a real person answers 24/7.
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