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Best HEPA Vacuums (2026): 7 Sealed-Filter Picks Compared

By InspectandTest Editorial Team Published October 17, 2026

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Best hepa vacuum

The best HEPA vacuum is not simply the one with “HEPA” printed on the box. A HEPA filter only helps if the vacuum body is sealed so air cannot leak around it, and only some listings say what their filter actually captures. That distinction matters most after mold cleanup, during lead-safe renovation work and in allergy-prone homes, which is where most people searching this term are headed. Below are seven picks, from a renovation-grade dust extractor to household uprights, sticks and a backpack unit, each matched to a job, then a buying guide on reading HEPA claims and on what a vacuum cannot make safe.

As an Amazon Associate we earn from qualifying purchases.

How we compared: we compared 15 current Amazon listings for vacuums that advertise HEPA filtration, on what each listing states: capture percentage and test standard, whether the system is described as sealed, bagged or bagless design, airflow, filter maintenance and warranty. One search result, a Bissell upright, did not mention HEPA at all and was left out. We did not lab-test these vacuums or use them hands-on. Prices and availability change often, so check the current listing before buying.

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Quick picks: the best HEPA vacuums by use case

ProductBest forKey featuresPriceBuy
DEWALT DWV010Renovation and remediation cleanup
  • Meets EPA RRP rule with DWV9330 filters
  • 150 CFM airflow
  • Auto filter cleaning
$499.00as of October 18, 2026Buy now →Check current price
Shark NV356EWhole-home sealed HEPA upright
  • 99.9% claim tied to ASTM F1977
  • Anti-allergen complete seal
  • 5-year limited warranty
$199.99as of October 18, 2026Buy now →Check current price
Bissell PowerClean 4214KLightweight corded sealed stick
  • Sealed HEPA, 99.97% claim
  • 27-foot cord
  • Converts to handheld
$119.98as of October 18, 2026Buy now →Check current price
Kenmore BC3005Bagged canister for allergies
  • HEPA bags plus triple HEPA system
  • Allergen seal stated
  • 9.5-foot wand reach
$219.99as of October 18, 2026Buy now →Check current price
Atrix VACBP10Ceilings, ledges and stairs
  • Backpack design
  • HEPA bag plus premotor and exhaust filters
  • 106 CFM, 10 filters included
$189.99as of October 18, 2026Buy now →Check current price
ECOMAX 8-gallon extractorWet and dry shop-style cleanup
  • HEPA filter, wet or dry
  • Semi-auto filter clean
  • Power tool activation
$149.99as of October 18, 2026Buy now →Check current price
iXlion TV109SCordless quick pickups
  • Up to 55 minutes on low
  • Dual HEPA plus steel filter
  • 6 lb
$99.98as of October 18, 2026Buy now →Check current price

Prices are Amazon’s listed prices as of the time shown and change often; check Amazon for today’s price. As an Amazon Associate we earn from qualifying purchases.

The 7 picks, compared listing by listing

1. DEWALT DWV010 — Best HEPA Vacuum for Renovation and Remediation Cleanup

Best for renovation cleanupDEWALT DWV010

8-gallon HEPA dust extractor with auto filter cleaning; listing says it meets the EPA RRP rule with DWV9330 filters.

Check price on Amazon$499.00 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Only listing that addresses the EPA RRP rule
  • Filter pulses clean every 30 seconds
  • 150 CFM from a 15-amp motor
  • Power-tool activation for sanding and drilling
Specification Details
Type 8-gallon HEPA dust extractor on casters
Motor / airflow 15 amp; 150 CFM
Filter Automatic pulse cleaning every 30 seconds; RRP compliance only with DWV9330 filters
Hose 15 ft anti-static, 1.25 in diameter, universal swivel connector
Tool link Power tool actuation switches the vacuum on and off with the tool
Weight / warranty 22 lb; 1-year limited warranty

DEWALT DWV010 — 8 gal, 15 A, 150 CFM, auto filter clean, 15 ft anti-static hose, RRP with DWV9330 filters, 1-yr warranty

The Only Listing That Claims EPA RRP Compliance

The EPA’s lead-safe guidance for do-it-yourselfers lists a HEPA vacuum as standard equipment for renovation work in older homes, and contractors working under the Renovation, Repair and Painting rule face specific HEPA vacuum requirements. Of the 15 listings on this shelf, the DEWALT is the only one that addresses that rule at all. Its wording is precise: it meets the RRP requirement for HEPA vacuums only when DWV9330 filters are installed. Check which filter ships in the box before using it on painted surfaces in a pre-1978 home.

It is also built for continuous fine dust. The filter pulses itself clean every 30 seconds, so suction does not collapse as plaster or sanding dust cakes the filter, and the power-tool switch lets it run only while a sander or drill is on. Only one other listing, the ECOMAX, mentions any form of automatic filter cleaning, and only two (this one and the Atrix) state airflow in CFM.

The trade-offs are size and purpose. At 22 lb on casters with a hose, it is not a carpet vacuum, and the listing does not state a capture percentage or test standard for the filter itself. Its warranty is one year, against five years on the Shark uprights.

Pros

  • Only listing that addresses RRP HEPA vacuum rules
  • Self-cleaning filter for heavy fine dust
  • Stated 150 CFM and power-tool actuation

Cons

  • RRP claim depends on a specific filter
  • No filter capture percentage stated
  • Bulky; not for everyday floor cleaning
  • 1-year warranty

Check DEWALT DWV010 price on Amazon

2. Shark Navigator NV356E — Best Sealed HEPA Upright for the Whole House

Best whole-home HEPA uprightShark NV356E

Lift-Away upright with a sealed HEPA system whose 99.9% claim cites ASTM F1977 testing at 0.3 microns and larger.

Check price on Amazon$199.99 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Capture claim names a test method and lab
  • Anti-allergen complete seal around the filter
  • Lift-Away pod for stairs and upholstery
  • Five-year limited warranty
Specification Details
Type Bagless upright with detachable Lift-Away pod
Filtration claim 99.9% of dust and allergens at 0.3 microns and larger, per ASTM F1977 testing
Seal Anti-Allergen Complete Seal
Dust cup 0.87 L
Filter care Washable HEPA filter; air dry 24 hours
Weight / warranty 13.7 lb; 5-year limited warranty

Shark NV356E — bagless Lift-Away upright, sealed HEPA, 99.9% at 0.3 µm+ (ASTM F1977), 0.87 L cup, 13.7 lb, 5-yr warranty

One of Two Listings That Tie the HEPA Claim to a Test Standard

Seven of the 15 listings give a capture percentage. Only two, this NV356E and Shark’s NV752, say how that number was measured: ASTM F1977, a test of the whole vacuum system rather than the filter alone. The NV356E listing goes further and names the testing lab and year. A whole-system test is the meaningful one, because a HEPA filter in a leaky housing lets dust bypass it.

Ten listings use the word “seal” somewhere, but the Shark uprights are the clearest about what is sealed: the complete seal is described as keeping dust and allergens inside the vacuum. The NV356E is also the lighter of the two ASTM-tested Sharks at 13.7 lb versus 15.4 lb, and it has a brushroll shutoff for hard floors.

Its 99.9% figure is lower than the 99.97% that defines a true HEPA filter at 0.3 microns, but it describes the whole system, which is not directly comparable. The listing does not state airflow or suction. Emptying a bagless cup also releases some dust, which matters after mold cleanup.

Pros

  • Whole-system capture claim with named test method
  • Complete seal clearly described
  • Lift-Away pod and brushroll shutoff
  • Five-year limited warranty

Cons

  • Bagless cup releases dust when emptied
  • No airflow or suction figure
  • Washable filter needs 24 hours to dry

Check Shark NV356E price on Amazon

3. Bissell PowerClean 4214K — Best Lightweight Corded Sealed HEPA Stick

Best lightweight sealed stickBissell PowerClean 4214K

Corded 3-in-1 stick with a sealed HEPA system rated to capture 99.97% of dust and allergens, and a 27-foot cord.

Check price on Amazon$119.98 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Sealed HEPA system with a 99.97% capture claim
  • Corded, so suction never fades with a battery
  • Converts to handheld for stairs and upholstery
  • Self-standing; LED headlights
Specification Details
Type Corded 3-in-1 stick and handheld
Filtration claim Sealed HEPA system; 99.97% of dust, dander and pet allergens
Cord 27 ft
Brush Tangle-free brush roll for hair up to 8 in
Weight 8.5 lb in the features; 10.09 lb in the product details
Warranty Not stated in listing

Bissell 4214K — corded stick/handheld, sealed HEPA 99.97%, 27 ft cord, tangle-free brush, LED lights, 8.5–10.1 lb

The Lightest Corded Vacuum Here With a Sealed 99.97% Claim

Three listings use the 99.97% figure that matches the HEPA definition: this 4214K, its FurFinder sibling 4282K and the Kenmore canister. The two Bissell sticks also describe the system as sealed. Between the two, the 4214K and 4282K are nearly the same machine; the FurFinder adds a 30-foot cord and brighter headlights. Either is a good choice, and the 4214K is listed here as the simpler of the pair.

A corded stick suits the regular upkeep that keeps allergens down: quick daily passes on hard floors and rugs without waiting on a battery. It is far lighter than the Shark uprights, and it converts to a handheld for stairs.

The listing gives two different weights, 8.5 lb in the description and 10.09 lb in the product details, and states no warranty. It does not name a test standard for its 99.97% figure, so it is not clear whether that describes the filter alone or the whole sealed system.

Pros

  • Sealed system with 99.97% claim
  • Lightweight, corded and self-standing
  • Handheld mode for stairs and furniture

Cons

  • No test standard named for the capture claim
  • Conflicting weight figures in the listing
  • No warranty term stated

Check Bissell PowerClean 4214K price on Amazon

4. Kenmore BC3005 — Best Bagged HEPA Canister for Allergy Households

Best bagged canisterKenmore BC3005

Two-motor bagged canister with HEPA bags, a triple HEPA filter system, stated allergen seal and 9.5-foot wand reach.

Check price on Amazon$219.99 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Bagged: dust stays sealed when you change bags
  • Triple HEPA filter system with 99.97% claim
  • Allergen seal stated in the specs
  • Telescoping wand reaches 9.5 feet
Specification Details
Type Bagged canister with powered head; two motors
Filtration HEPA bags (two included) plus triple HEPA filter system; 99.97% claim
Electrical 120V, 12A; 210 air watts at the hose end
Reach Aluminum telescoping wand to 9.5 ft; 26 ft retractable cord
Cleaning width 14 in; 4 height settings
Weight / warranty 19.29 lb; 1-year manufacturer warranty

Kenmore BC3005 — bagged canister, HEPA bags + triple HEPA, allergen seal, 210 W suction, 9.5 ft reach, 26 ft cord, 1-yr warranty

The Only Household Floor Vacuum Here That Uses HEPA Bags

Three listings on the shelf use bags: this Kenmore, the Atrix backpack and the ECOMAX shop vacuum. The Kenmore is the only one of the three built for carpet and floors around the house. That matters for allergy and post-mold households, because emptying a bagless dust cup puffs fine dust back into the room while a bag is lifted out closed.

The listing also gives more electrical detail than most household listings, with amperage, suction in air watts at the hose and cleaning width. Its wand extends to 9.5 feet for ceilings, vents and the tops of cabinets, where fine dust collects.

One line in the listing is clearly garbled, saying the filter traps 99.97% “of stains,” and it does not name a test standard. Ongoing bag purchases are part of the cost, and at 19.29 lb it is the heaviest household machine on this list.

Pros

  • Bags contain dust during disposal
  • Allergen seal and triple HEPA system stated
  • Long wand reach and retractable cord

Cons

  • Capture claim wording is garbled; no standard named
  • Replacement bags are an ongoing purchase
  • Heaviest household pick at 19.29 lb

Check Kenmore BC3005 price on Amazon

5. Atrix Ergo VACBP10 — Best HEPA Backpack for Ceilings, Ledges and Stairs

Best for ceilings and ledgesAtrix VACBP10

Backpack canister with four filtration stages including an 8-quart HEPA bag, 106 CFM airflow and 10 filters included.

Check price on Amazon$189.99 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Four filtration stages, including a HEPA bag
  • Backpack frees both hands on ladders and stairs
  • States 1,400W motor and 106 CFM airflow
  • Bundle includes 10 filters and blower nozzles
Specification Details
Type Backpack canister with waist strap
Filtration 8-quart HEPA bag, cloth shake-out bag, HEPA premotor filter, exhaust filter
Motor / airflow 1,400W; 106 CFM
Reach 6 ft hose; 22 to 37 in extension wand
Accessories Floor and turbo brushes, dust brush, crevice tool, 3 blower nozzles, 10 filters
Weight / warranty 10.3 lb; 1-year limited warranty

Atrix VACBP10 — backpack, 4-stage filtration with HEPA bag, 1,400 W, 106 CFM, 6 ft hose, 10 filters, 10.3 lb, 1-yr warranty

The Only Backpack Vacuum on the Shelf, With the Most Filtration Stages

The Atrix is the only backpack design among the 15 listings, and it lists four separate filtration stages, more than any other listing describes. A HEPA bag catches the dust, a cloth bag supports it, and HEPA filters sit both before the motor and at the exhaust. It is also one of only two listings to state airflow, at 106 CFM.

For high work, such as wiping down ceiling joists, ductwork in an unfinished basement or tops of door frames after cleanup, a backpack keeps the weight on your hips and your hands on the ladder and the wand. The bundle’s 10 included filters cover a long stretch of use.

The listing is aimed at janitorial work, so expect a utility tool rather than a carpet vacuum. It does not give a capture percentage or test standard, and it does not say whether the system is sealed. The hose is 6 feet, shorter than the 15-foot hose on the DEWALT.

Pros

  • Four stated filtration stages with HEPA bag
  • Hands-free carry for high and awkward spots
  • Airflow stated; 10 filters included

Cons

  • No capture percentage or seal described
  • Not designed for carpet cleaning
  • Short 6-foot hose

Check Atrix VACBP10 price on Amazon

6. ECOMAX 8-Gallon Dust Extractor — Best Wet and Dry HEPA Shop Vacuum

Best wet and dry HEPA optionECOMAX 8-gallon extractor

Stainless 8-gallon wet/dry vacuum and dust extractor with HEPA filter, semi-auto filter cleaning and tool activation.

Check price on Amazon$149.99 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Handles both wet pickup and fine dry dust
  • Semi-automatic filter cleaning and dust-full indicator
  • Starts automatically with a connected power tool
  • Stainless tank with drain port; anti-static hose
Specification Details
Type 8-gallon wet/dry vacuum with dust extractor mode
Filtration HEPA filter, foam filter and three disposable filter bags
Filter care Semi-automatic filter cleaning; dust-full indicator
Hose 10 ft anti-static
Tank Stainless steel with built-in drain port
Power / warranty Listed as 6.5 HP peak; warranty not stated in listing

ECOMAX EM18412E-8AA — 8 gal stainless wet/dry, HEPA + foam + bags, semi-auto filter clean, PTA, 10 ft anti-static hose

The Only Wet/Dry Unit Here That Also Self-Cleans Its Filter

Two listings handle liquids: the WEN shop vacuum and this ECOMAX. Two describe automatic filter cleaning: the DEWALT and this ECOMAX. Only the ECOMAX does both, which suits a homeowner who might be sucking up water from a basement leak one weekend and drywall dust the next.

It includes a HEPA filter for dry work plus a foam filter and bags, and its stainless tank has a drain port for emptying water without tipping the drum. Power-tool activation mirrors the DEWALT feature for sanding and cutting.

The listing does not claim RRP compliance, does not state a capture percentage and gives no warranty term. “6.5 HP” on shop vacuums is a peak figure that says little about sustained suction. Follow the manual on switching to the foam filter for wet pickup; a soaked paper HEPA filter loses its value and can grow mold.

Pros

  • Wet pickup plus HEPA dry filtration
  • Semi-auto filter cleaning and full indicator
  • Stainless tank with drain port

Cons

  • No RRP claim or capture percentage
  • No warranty term stated
  • Peak horsepower is not a useful spec

Check ECOMAX 8-gallon extractor price on Amazon

7. iXlion TV109S — Best Cordless HEPA Stick for Quick Pickups

Best cordless optioniXlion TV109S

6 lb cordless stick with dual HEPA and stainless steel filtration, up to 55 minutes on low and a one-touch dust ejector.

Check price on Amazon$99.98 as of October 18, 2026 — prices change; see Amazon for current price.

Why we like it

  • Only cordless vacuum on the shelf
  • Up to 55 minutes on low, 20 on max
  • One-touch dust cup ejection, no hand contact
  • Light at a stated 6 lb
Specification Details
Type Cordless stick with detachable battery
Motor / suction 550W; up to 45 kPa
Runtime / charge Up to 55 min low, 20 min max; 4 to 6 hour charge
Filtration claim Dual HEPA plus stainless steel filter; up to 99.99% of fine dust
Weight 6 lb
Warranty Not stated in listing

iXlion TV109S — cordless stick, 550 W, 45 kPa, 55/20 min runtime, dual HEPA + steel filter, one-touch emptying, 6 lb

The Only Cordless HEPA Vacuum Among the Listings

Every other household vacuum here plugs in. The iXlion is the one cordless option, and its one-touch ejector empties the cup without your hand near the debris, a small but real help for allergy sufferers. Its 99.99% claim is the highest number on the shelf.

That number deserves skepticism. The listing does not name a particle size or test standard for the 99.99% figure, and it describes a “sealed design” only in reference to the dust cup. Compare that with the Shark NV356E, whose lower 99.9% figure comes with a named whole-system test.

Use it as a convenience vacuum for daily crumbs and pet hair, not as your cleanup tool after mold or renovation work. The 20-minute runtime on max suction limits deep cleaning, and the listing states no warranty.

Pros

  • Cordless with up to 55 minutes on low
  • Hands-off dust cup emptying
  • Very light at 6 lb

Cons

  • 99.99% claim has no particle size or standard
  • Only 20 minutes on max suction
  • No warranty stated

Check iXlion TV109S price on Amazon

What “HEPA” actually means on a vacuum listing

The EPA describes a HEPA filter as a pleated mechanical filter that can theoretically remove at least 99.97% of dust, pollen, mold, bacteria and other airborne particles at 0.3 microns, the hardest size to catch. Particles larger or smaller are trapped even more efficiently. Our HEPA filter guide explains the rating in more depth.

On a vacuum, that filter is only half the story. Three kinds of claims appear on this shelf:

  • “HEPA filter” with no number. Several listings, including two of the Shark uprights and the WEN shop vacuum, say HEPA but give no capture percentage. The WEN describes its filter as an “F9 HEPA” without a percentage, which makes its performance hard to judge.
  • A filter percentage. 99.97% matches the HEPA definition, but unless the listing says otherwise, it may describe the filter material alone.
  • A whole-system test. The two Shark listings that cite ASTM F1977 describe how much dust the entire vacuum retains. This is the most useful claim, because air that leaks around gaskets, cracked housings or the dust cup never reaches the filter.

Look for the words “sealed” or “complete seal” together with a capture figure. A vacuum without a sealed path can blow fine dust out through its seams even with a genuine HEPA filter inside.

Bagged vs bagless, and how to empty and maintain a HEPA vacuum

Bagless vacuums save on supplies, but every time the cup is emptied, a cloud of the finest dust escapes. For everyday crumbs that is a nuisance; after mold cleanup or with a household member who has asthma, it partly undoes the job. Bagged machines like the Kenmore and Atrix let you remove the bag closed.

  • Empty bagless cups outdoors, into a bag held close to the cup, then seal the bag.
  • Change bags before they are completely full; overfilled bags lose suction and can split.
  • Wash washable HEPA filters only as the manual directs. Shark says to rinse until clear and air dry for 24 hours. A damp filter can grow mold inside the vacuum.
  • Replace non-washable HEPA filters on the maker’s schedule, and sooner after heavy dust work.
  • Wear gloves and a mask when changing filters after mold or renovation work. EPA’s mold remediation training material says workers changing HEPA vacuum filters should wear protective equipment, because the filter now holds what it captured.

Using a HEPA vacuum after mold cleanup

The EPA’s mold remediation guidance recommends HEPA vacuums for the final cleanup of remediation areas after materials have been thoroughly dried and contaminated materials removed, and for cleaning dust that settled outside the work area. In other words, the vacuum is the last step, not the cleanup itself. It does not remove mold growing in drywall, carpet pad or wood framing, and it does nothing about the moisture that fed the growth.

The EPA says a homeowner can usually handle a moldy area smaller than about 10 square feet; larger growth, or mold after significant water damage, calls for professional guidance. When you do vacuum, move slowly, use the hose rather than a spinning brushroll on moldy surfaces, and seal the bag or cup contents before carrying them through the house. Our guide to HEPA vacuuming during mold remediation walks through the full sequence, and the mold removal hub covers when a professional remediator is the better call.

Lead dust and asbestos: what a HEPA vacuum can and cannot make safe

About three-quarters of U.S. homes built before 1978 still contain some lead-based paint, according to the EPA, and Denver, Aurora, Colorado Springs and older Front Range towns have plenty of them. The EPA’s lead-safe guide for do-it-yourselfers lists a HEPA vacuum among the basic tools for renovation, and says to vacuum the work area frequently and clean until no dust or debris remains. Contractors paid to disturb paint in pre-1978 housing must follow the RRP rule, which is why the DEWALT listing’s compliance note matters to them.

Asbestos is different. The EPA tells homeowners not to dust, sweep or vacuum debris that may contain asbestos, and to have removal and major repair done by people trained and qualified in handling it. Professionals finish an asbestos job with wet methods and HEPA vacuums, and the EPA says a regular vacuum should never be used. Owning a HEPA vacuum does not make DIY asbestos removal safe. Popcorn ceilings, old vinyl tile and its mastic, pipe and duct insulation, and vermiculite attic fill in older homes all call for testing before anyone disturbs them.

If you suspect asbestos or lead paint, stop and test before sanding, scraping or vacuuming. That is the cheaper and safer order of operations.

Front Range considerations

Front Range homes deal with wildfire smoke residue, fine soil blown in by chinook winds, and pet dander sealed inside through long winters. A sealed HEPA vacuum used once or twice a week, together with a good furnace filter or a HEPA air purifier in bedrooms, does more for allergy symptoms than an occasional deep clean.

Basements and crawl spaces are where moisture problems hide even in a dry climate. If a basement smells musty or carpet stays damp after a storm, vacuuming is not the answer; finding the water source is. For homes that want built-in convenience, a central vacuum system exhausts outdoors or to the garage, which keeps fine dust out of living space altogether.

When to call a professional

Call a professional, not a vacuum, when mold covers more than a small patch, when water damage soaked drywall or flooring, when anyone in the home has symptoms that seem tied to a damp area, or when renovation will disturb materials that might contain asbestos or lead. A mold inspection identifies the moisture source and extent, so remediation is targeted rather than guessed. Start with our mold inspection overview, and if you are on the Front Range, get in touch through our contact page to connect with a vetted local inspector.

References

Frequently asked questions

What is the best HEPA vacuum for mold cleanup?

Look for a sealed HEPA system, ideally a bagged unit or one with a whole-system capture claim, so captured spores stay inside. The EPA recommends HEPA vacuums for final cleanup after moldy materials are removed and the area is dry. A vacuum does not remove mold growing inside materials, and growth over about 10 square feet calls for professional guidance.

Is a HEPA filter the same as a sealed HEPA vacuum?

No. A HEPA filter can capture at least 99.97% of particles at 0.3 microns, but if air leaks around the filter, dust escapes through the vacuum's seams. A sealed system routes all air through the filter. Listings that describe a complete seal and cite a whole-system test such as ASTM F1977 make the strongest claim.

Can a HEPA vacuum be used to clean up asbestos?

Not by a homeowner. The EPA says not to dust, sweep or vacuum debris that may contain asbestos and to have removal done by trained, qualified professionals, who use wet methods and HEPA vacuums as part of controlled procedures. Owning a HEPA vacuum does not make DIY asbestos removal safe; test suspect material before disturbing it.

Do I need a HEPA vacuum for lead paint dust?

The EPA's lead-safe guidance for do-it-yourselfers lists a HEPA vacuum as basic equipment for renovation work in homes built before 1978. Contractors working under the RRP rule must use vacuums that meet its HEPA requirements. One listing on this shelf, a DEWALT dust extractor, states it meets that rule with a specific filter.

Are bagged HEPA vacuums better for allergies?

Often, yes. Emptying a bagless dust cup releases a cloud of fine dust, while a bag can be lifted out closed and discarded. Bagged machines cost more to run because of replacement bags. If you choose bagless, empty the cup outdoors into a bag and seal it, and keep filters clean and fully dry.