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Air Scrubbers for Construction Dust: Control Job-Site Silica and Particles
How Air Scrubbers Capture Construction Dust
Air scrubbers for construction dust pull airborne particles through a HEPA filter that captures up to 99.97% of them at 0.3 microns, protecting your crew and keeping a site within OSHA's respirable silica limits. Cutting concrete or grinding surfaces throws silica into the air, often well above OSHA's 50 µg/m³ permissible exposure limit, and a space can go non-compliant within minutes. Filter staging is what makes the HEPA element last: a washable pre-filter catches heavy drywall and wood chips first, an optional carbon or secondary stage traps finer particulate, and only the smallest respirable dust reaches the HEPA media. Match the staging to the debris, since sanding drywall loads pre-filters fast while silica and hardwood dust drive straight at the HEPA.
Sizing Air Scrubber CFM to Air Changes
Size the machine by air changes per hour, not floor area alone. Most construction and remediation work targets 4–6 ACH, meaning the scrubber cycles the room's full air volume four to six times every hour. Multiply room length by width by height for cubic feet, multiply by your target ACH, then divide by 60 to get the CFM you need. A 20-by-30 room with 10 ft ceilings is 6,000 cubic feet; at 6 ACH that works out to 600 CFM. Units in this collection range from 550 to 4,000-plus CFM, so a single large scrubber or several staged smaller ones can hold the target as the space changes.
Related: Commercial Air Scrubbers · HEPA Air Scrubbers · Mini Air Scrubbers
Negative Air, Filter Changes, and Job-Site Setup
Run the scrubber as a negative-air machine when you need containment: seal the work area in poly, duct the exhaust outside or into an adjacent buffer zone, and the drop in interior pressure keeps dust from drifting into occupied space every time someone opens the barrier. XPOWER units reposition floor by floor and many report airflow over Bluetooth, while Abatement Technologies builds the larger machines for continuous multi-shift runs, and Novatek and Aerospace America cover the compact end. Watch filter loading on heavy jobs, because a clogged pre-filter starves airflow and drops your ACH. Change pre-filters often during dusty demolition, sometimes daily, and swap the HEPA on the gauge or airflow reading rather than the calendar so you keep rated capture without choking the fan. Keeping a spare set of pre-filters on the truck means a loaded scrubber goes back to work instead of sitting idle.
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