Air Scrubbers for Restoration Work
An air scrubber is most useful when you choose it around the airflow, filtration, containment and electrical requirements of the job—not around a single large CFM number. This page is the broad selection hub for restoration air scrubbers. More specific questions such as HEPA filtration, mold remediation, negative-air setups and commercial fleet selection have their own dedicated pages so those intents do not get mixed together.
What a restoration air scrubber actually does
A restoration air scrubber pulls air from the work area through one or more filters and returns or exhausts the filtered air. In a simple recirculating setup, the machine repeatedly filters air within the same room or contained work area. When a manufacturer supports ducting and the remediation plan calls for it, the same class of machine may be configured to exhaust filtered air and support a negative-pressure containment setup.
That distinction matters because “air scrubber” describes the equipment class, while “negative air” describes how compatible equipment can be used in a containment strategy. A machine can be a capable air scrubber without every negative-air feature being documented, and a negative-air decision cannot be reduced to the fan’s free-air CFM alone.
The six specifications that change the buying decision
| Specification | What it tells you | What it does not tell you |
|---|---|---|
| Airflow / CFM | How much air the unit can move under the manufacturer’s published rating. | How it will perform under every duct restriction, filter-loading condition or speed setting. |
| HEPA filtration | Whether the unit includes a high-efficiency particulate filter and the manufacturer’s published efficiency wording. | Whether odors or gases are addressed; those may require a separate carbon stage. |
| Static pressure | How much pressure capability the manufacturer publishes for overcoming resistance. | A universal ducted airflow number unless the manufacturer also publishes that operating point. |
| Ducting / negative-air support | Whether the unit is designed to connect to inlet or outlet ducting for containment-style use. | That any containment setup is automatically appropriate or compliant. |
| Electrical load | How much current the unit draws and how multiple machines affect a circuit plan. | That a daisy-chain outlet authorizes unlimited connected equipment. |
| Filters and parts | Which prefilters, HEPA filters and optional carbon filters are supported. | How long a filter will last on every job; loading depends on conditions and use. |
CFM should be tied to room volume and air changes
For a room or containment area, square footage alone leaves out ceiling height. A better starting point is volume: length × width × height. If a target air-change rate has been established for the job, the airflow relationship is:
Required CFM = room volume in cubic feet × target air changes per hour ÷ 60.
Legend Brands publishes the same basic relationship in its air-change guidance and emphasizes that the appropriate ACH depends on the project. Its technical guidance gives different examples for dust control and mold-remediation work rather than treating one ACH number as universal. That is the approach Restoration Select will carry into the dedicated sizing calculator: the arithmetic can be fixed, while the target ACH remains an explicit user/job assumption.
Example: a 20 × 15 × 8 ft room has 2,400 cubic feet of volume. At a user-selected 6 ACH target, the nominal airflow requirement is 240 CFM. At 10 ACH, it becomes 400 CFM. The calculation is straightforward; deciding the appropriate target for a real remediation project is the part that requires job context.
Current examples show why CFM alone is not enough
| Current model | Published airflow | Published amps | Weight | Decision-relevant difference |
|---|---|---|---|---|
| Dri-Eaz HEPA 700 | 275–700 CFM | 1.5–3.0 A | 42 lb | Variable airflow, 3.0 in. static pressure, optional carbon, documented negative-air use and remote monitoring. |
| Dri-Eaz DefendAir 400 | 400 CFM | 2.2 A | 29 lb | Smaller professional unit with HEPA filtration and published daisy-chaining up to five units under manufacturer conditions. |
| XPOWER X-2480A | 550 CFM | 2.8 A | 23.6 lb | Very light, compact three-stage HEPA unit with ductable outlet and daisy-chain outlet. |
| XPOWER X-3580 | 600 CFM | 2.8 A | 32.8 lb | Four-stage filtration with activated carbon included. |
| AlorAir PureAiro HEPA Max 870 | 270–550 CFM | 2.5 A | 37.4 lb | Three-stage HEPA/carbon system with 2.8 in. static pressure and inlet/outlet duct connections. |
| AlorAir PureAiro HEPA Max 970 | 270–750 CFM | 2.8 A | 39.6 lb | Higher maximum airflow in the same general ductable HEPA/carbon format. |
Those numbers are useful because they reveal tradeoffs. The 23.6 lb XPOWER X-2480A can be attractive when carrying several machines matters; the HEPA 700 publishes higher static pressure and connected monitoring; the X-3580 includes carbon filtration; and the HEPA Max 970 offers more maximum airflow than the 870. None of those differences can be captured by sorting one column from largest to smallest.
HEPA, prefilters and carbon each have a different job
A prefilter protects the more expensive primary filter by capturing larger debris first. The HEPA stage is intended for fine particulate filtration. Activated carbon is a different medium used for certain gases and odors; it should not be described as another “level” of particulate filtration.
EPA’s current HEPA explanation describes HEPA as a pleated mechanical air filter capable, in theory, of removing at least 99.97% of airborne particles at 0.3 microns. Individual restoration manufacturers may publish their own tested wording—for example, Dri-Eaz currently publishes 99.99% for 0.1–0.5 micron particulates on the HEPA 700. Restoration Select preserves the exact manufacturer wording instead of rewriting every product into the same generic percentage.
If your main question is filter construction, HEPA wording, carbon stages and filter replacement, use the dedicated HEPA Air Scrubber page rather than treating this broad hub as the final filtration guide.
Negative-air capability is a setup question, not just a product label
Dri-Eaz documents its HEPA 700 for negative- or positive-pressure filtration setups, and its current ducting page specifies 14-inch lay-flat and semi-rigid ducting options. XPOWER documents the X-2480A outlet as ductable to channel filtered air or create negative air pressure. AlorAir publishes inlet and outlet duct sizes for its HEPA Max units.
Those examples show the product-side requirement: the machine needs a documented way to connect the containment strategy to the filtered airflow. The job-side requirement is separate. Pressure differential, containment integrity, exhaust location and remediation procedure are not solved by buying the largest fan.
For that narrower question, use Negative Air Machine.
Electrical load becomes important as the fleet grows
One air scrubber with a 2–3 amp draw may look modest. Several machines, dehumidifiers and air movers operating in the same area can quickly turn electrical planning into a real constraint. Manufacturer daisy-chain limits are also model-specific: Dri-Eaz currently publishes up to seven HEPA 700 units on low under its stated 15-amp condition, up to four DefendAir HEPA 700 units on low, and up to five DefendAir 400 units under the manufacturer’s published condition.
Those are manufacturer-specific limits, not a sitewide rule. Restoration Select keeps each limit attached to the exact product record and will treat the future power/circuit planner as a planning aid rather than an electrical authorization.
When a commercial-grade scrubber is worth the extra cost
Commercial equipment starts to make more sense when the machine will be moved often, stacked in a vehicle or warehouse, connected to ducting, run for long periods, supported with replacement filters, or deployed as part of a multi-unit restoration fleet. Housing, handles, filter access, cord length, hour meters, GFCI outlets, published chain limits and service/parts support can matter more in those conditions than they do for occasional room-air cleaning.
If you are evaluating those fleet and operating questions rather than learning the equipment category, use Commercial Air Scrubber.
Where to start shopping
The Recommended Restoration Equipment page groups current featured products by buying path rather than pretending one machine is universally best. It currently includes premium variable-airflow, four-stage carbon/HEPA, compact/light and higher-airflow scrubber paths with exact manufacturer specifications and the current Amazon shopping routes.
Related air-scrubber decisions
Use the page that matches the decision you are actually making. These pages intentionally separate broad selection, filtration, mold-remediation context, containment/negative air, commercial fleet considerations and consumer-air-cleaner comparisons.
- Air Scrubber — current page
- HEPA Air Scrubber
- Air Scrubber for Mold
- Negative Air Machine
- Commercial Air Scrubber
- Air Scrubber vs Air Purifier
- Recommended Equipment
Use the live air-scrubber tools
Size the airflow first when needed, use Finder to build a requirement-based shortlist, then compare exact normalized rows without another ranking layer.
Primary references for this page
- Dri-Eaz HEPA 700 ↗Current manufacturer product page for airflow, filtration, static pressure, electrical load, daisy-chaining and monitoring.
- Legend Brands air-change guidance ↗Manufacturer technical guidance explaining that target air changes depend on the project and showing the volume/CFM relationship.
- U.S. EPA: What is a HEPA filter? ↗Current EPA explanation of HEPA filtration and the 99.97% at 0.3 micron reference point.
- XPOWER X-2480A ↗Current manufacturer product page for 550 CFM, three-stage filtration, 2.8A draw, ducting and portability.
- AlorAir PureAiro HEPA Max 970 ↗Current manufacturer source for variable airflow, duct sizes, HEPA/carbon filtration, static pressure and electrical load.
Check the mixed equipment load
Combine the selected air scrubber with dehumidifiers and air movers to see the summed planning amp load.
Comparing Dri-Eaz air scrubbers?
See the current Dri-Eaz lineup or go directly to the HEPA 700 exact-model page.
Comparing AlorAir air scrubbers?
Compare CleanShield HEPA 550 with PureAiro HEPA Max 870 and 970.
Compare XPOWER and BlueDri scrubber lines
See the current normalized XPOWER lineup or review BlueDri's AirShield airflow conflict and current AS1000 context.
Frequently asked questions
What is an air scrubber used for in restoration work?
A restoration air scrubber moves room or containment air through a filtration system so airborne particles are captured while work is underway. Some models can also be ducted for negative-air use. Equipment selection still depends on airflow, filtration, ducting, electrical load and the job plan.
How much CFM does an air scrubber need?
CFM should be tied to the volume of the space and the target air-change rate rather than to square footage alone. Room volume is length × width × height, and required CFM can be derived from volume × target ACH ÷ 60. The appropriate ACH target depends on the type of work and professional requirements.
Does more CFM always make one air scrubber better than another?
No. Higher airflow can reduce the number of units needed for a target air-change rate, but static pressure, filtration stages, ducting, electrical load, filter support, weight and portability can be equally important.
Can the same air scrubber be used as a negative air machine?
Some can, but only when the manufacturer documents suitable ducting or negative-air use. The negative-air decision also depends on containment and where the filtered exhaust is discharged.
Should I choose a HEPA air scrubber for mold work?
HEPA filtration is commonly used in remediation equipment, but choosing the machine is only one part of the remediation plan. Air filtration does not remove the moisture source or replace source removal, cleaning, containment and other job-specific procedures.