HEPA Air Purifier Technology Guide

The term HEPA is an acronym for “High Efficiency Particulate Air.” HEPA filters are a common tool used in many mechanical air cleaners to filter small, unwanted, and unhealthy particles out of the air. They consist of a web of fibers arranged in a random pattern.

The first HEPA filters were designed by United States Department of Energy in the 1940s, though it was not until the 1950s that they began to enjoy widespread commercial use. Since then, there have been advances which have improved upon the original HEPA filters, but their basic design and function has remained the same for over half a century.

How HEPA Air Purifiers Work

According to the online encyclopedia Wikipedia, air purifiers with HEPA filters operate differently than a typical membrane filter. Non-HEPA filters generally have only very small pores, so that any bits of matter too large to fit through them are trapped. HEPA filters, however, operate based on a different principle. The space between HEPA fibers is actually often much larger than the particles a HEPA filter targets. Instead, HEPA filters catch particles through a combination of three different mechanisms:

HEPA Filter Particle Capture Technology

  • Interception – most commonly affects particles above .4 microns. The particle sticks to one of the filter’s fibers after coming close enough to it. It is as if the fiber reaches out and catches the particle.
  • Impaction – most commonly affects particles above .4 microns. The particle is forced into contact with a fiber by the trajectory of the airstream in which it is traveling, and is embedded into it. It is as if the particle makes a head-on collision with the fiber and then cannot dislodge itself.
  • Diffusion – most commonly affects particles below .1 microns. The arrangement of the fibers makes the particle collide with air or other gas molecules, and it is thrown off its course through the filter. Basically this is a means of keeping the particle within the filter until one of the other two methods succeeds in ensnaring it. It is as if the particle is blown about by wind until it collides with a fiber.

Diagram information – Image shows the essential parts of a HEPA filter; the 3 smaller diagrams show how it works:

  • Thick Brown Lines – represent fibers in the filter medium.
  • Blue Lines – show the direction of air flow.
  • Dark Circle – represents a particle (i.e. dust, bacteria, spore, etc.)
  • Dotted Red Line – represents the direction of the particle; as soon as a particle comes within one radius of a HEPA fiber it sticks to it.

As the numbers above indicate, there is a narrow size window around .3 microns, inside of which the particles are less likely to be trapped by a HEPA filter. This is called the Most Penetrating Particle Size (MPPS). However, particles of this size are still captured by the filter, albeit less efficiently. The best measure of a HEPA filter’s true worth is its ability to filter out particles within the MPPS range.

A standard way to test the effectiveness of HEPA filters is known as the “DOP penetration test.” This involves sending a cloud of particles .3 microns in size through filter and comparing how highly concentrated these particles are in the airstream before and after they pass through it.

Effectiveness of HEPA Filters in Air Purifiers

According to the United States Environmental Protection Agency, HEPA filters are the most effective filter commonly found in mechanical air cleaners. To quote the EPA’s guide to residential air cleaners: “True HEPA filters with a MERV between 17 and 19 are defined … as having a minimum efficiency between 99.97 percent and 99.999 percent in removing 0.3 [micron] particles.” MERV stands for “Minimum Efficiency Reporting Value” and represents the purifier’s ability to clean the air. Usually MERV numbers fall between 1 and 16, but ratings of 17-20 are sometimes used for HEPA filters.

However, the EPA also warns of diminishing returns, to the point that using a stronger and more effective filter is no longer cost-efficient. It claims that cleaners with a MERV rating from 7-13 “are likely to be almost as effective as true HEPA filters” for most common purposes, and they will also be quieter and less expensive. Installing HEPA filters in large air cleaners will often require professional installation, further adding to the cost.

Also, in small, portable air cleaners, HEPA filters “may not be preferable to medium-efficiency filters because of HEPA filters’ lower air delivery.”

Therefore, there are limits to the effectiveness of HEPA filters. On the other hand, they may be preferable to the so-called “HEPA-type” filters that are commonly found in lower-end small air cleaners, simply because HEPA filters must meet certain standards to be called HEPA, while “HEPA-type” could mean nearly anything.

Limitations of HEPA Filters

Keep in mind that the “P” in “HEPA” stands for “Particulate.” HEPA filters only target airborne particles, not gasses. Although this means that a HEPA filter will help clean the air of many common pollutants, it also means that many others will pass right through the filter undisturbed. Many of the better air purifiers on the market will combine a HEPA filter with some other system that targets gaseous pollution, such as an activated carbon filter. Therefore, consumers are advised to consider their needs and all of the features of air purifiers before deciding which to buy.

As indicated above, HEPA filters also tend to be more expensive than other filters. Filters will almost always need to be regularly replaced at least once or twice a year, as well, meaning that there is an extra recurring cost in addition to the initial price of the purifier. This typically isn’t large, but over time it does add up. Of course, some customers may decide that this an acceptable price to pay for the HEPA filter’s power and reliability.


Conclusion – The Bottom Line About HEPA Air Purifier Filters

Anyone who does much comparison between different air purifiers will soon come across HEPA filters. They are the most effective type of filter available for removing solid particles from the air. On the other hand, they are more expensive, and are not effective at removing gasses. It would be a good idea to consider a purifier with a HEPA filter, especially over an ill-defined “HEPA-type” alternative, but be aware that there are limitations, and the presence of a HEPA filter does not by itself indicate that the purifier is a good one.

  • HEPA filters only filter particles, not gasses
  • HEPA-type filters may be a viable alternative due to being able to move more air through the filter quicker than standard HEPA filters
  • HEPA filters tend to be more expensive – something to consider since air purifier filters require replacement over time

Air Purifiers With HEPA Filters

ModelFilter Type
3M Filtrete FAP02-RSHEPA Filter
Aerus AQ 1000Pre-Filter, HEPA Filter & V.O.C. Blanket Filter
Aerus Electrolux EL490AHEPA Filter, Carbon Filter & Plasma Wave
Aerus Electrolux EL491AHEPA Filter, Carbon Filter & Plasma Wave
Aerus Electrolux EL500AHEPA Filter & Carbon Filter
Aerus Electrolux EL500AXHEPA Filter, Carbon Filter & Plasma Wave
Aerus Electrolux EL500AZHEPA Filter, Carbon Filter & Plasma Wave
Aerus G2Pre-Filter, HEPA Filter & Carbon Blanket Filter
Air-O-Swiss 2061HEPA Filter w/ Activated Carbon Filter
Air-O-Swiss 2071HEPA Filter w/ Activated Carbon Filter
Airgle 150HEPA Filter
Airgle 7504 stage – Pre-Filter, HEPA, Activated Carbon Filter & High Airflow Filter
Airpura C600HEPA Filter w/ Carbon Filter, Microsupress Filter & Cleanable Pre-Filter
Airpura H600HEPA Filter w/ HI-C Carbon Weave Filter & Cleanable Pre-Filter
Airpura I600HEPA Filter w/ Cleanable Pre-Filter
Airpura P600HEPA Filter w/ Titan Clean Reflectors, Carbon Filter & Pre-Filter
Airpura R600HEPA Filter w/ Activated Carbon Filter & Pre-Filter
Airpura T600HEPA Filter w/ Caron Filter & TarBarrier Pre-Filter
Airpura UV600HEPA Filter w/ Activated Carbon Filter & UV Lamps
Airpura V600HEPA Filter w/ Enhanced Carbon Filter & Cleanable Filter
Alen A250HEPA Filter
Alen A350HEPA (integrated Activated Carbon) w/ Washable Pre-Filter
Alen A375UVHEPA w/ UV Lamps & Photo-Catalytic Oxidation Filter
Alen ParaldaHEPA style w/ UV Lamp
Alen T100HEPA w/ Washable Pre-Filter
Alen T300HEPA w/ UV Lamp & Activated Carbon Filter
AllerAir 4000 D ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 4000 D VocarbPre-Filter, Micro-HEPA Filter & Vocarb Blend Carbon Filter
AllerAir 4000 DX ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 4000 DX VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 4000 ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 4000 VocarbPre-Filter, Medical Grade HEPA Filter & Vocarb Blend Carbon Filter
AllerAir 5000 D ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 5000 D MCS SupremePre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 5000 D VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 5000 DSTar-trapping Pre-Filter, Micro-HEPA & Carbon Filter
AllerAir 5000 DX ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 5000 DX VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 5000 DX VOGPre-Filter, Micro-HEPA Filter, Carbon Filter & Vocarb Blend Carbon Filter
AllerAir 5000 DXSTar-trapping Pre-Filter, Micro-HEPA & Carbon Filter
AllerAir 5000 ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 5000 HEPA OnlyPre-Filter & Medical Grade HEPA Filter
AllerAir 5000 MCS SupremePre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 5000 Pro ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 5000 VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 5000 VOGPre-Filter, Medical Grade HEPA Filter, Carbon Filter & Vocarb Blend Carbon Filter
AllerAir 5000 W ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 5000 W VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 6000 AH ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 6000 AH VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 6000 D AH ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 D AH VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 D ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 D VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 DSPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 DX ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 DX VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 DXSPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir 6000 VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir 6000 W VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic D ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic D MCSPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic D VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic MCSPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic VOGPre-Filter, Medical Grade HEPA Filter, Carbon Filter & Vocarb Blend Carbon Filter
AllerAir AirMedic+ D ExecPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic+ D MCSPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic+ D VocarbPre-Filter, Micro-HEPA Filter & Carbon Filter
AllerAir AirMedic+ ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic+ MCSPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic+ VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirMedic+ VOGPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirTube ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirTube Supreme ExecPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirTube Supreme VocarbPre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir AirTube VocarbPre-Filter, Medical Grade HEPA Filter & Vocarb Blend Carbon Filter
AllerAir I-6500 AH 80Refillable Carbon Filter, Medical Grade HEPA Filter & Pre-Filter
AllerAir Project 007Pre-Filter, Medical Grade HEPA Filter & Carbon Filter
AllerAir Salon 5000Vocarb Carbon Filter, Medical Grade HEPA Filter & Pre-Filter
AllerAir Salon 6000Vocarb Carbon Filter, Medical Grade HEPA Filter & Pre-Filter
Amaircare 10000HEPA Filter, Carbon Filter & Foam Pre-Filter (Optional VOC Filter)
Amaircare 2500HEPA Filter, VOC Filter & Pre-Filter
Amaircare 3000HEPA Filter, VOC Filter & Pre-Filter
Amaircare 6000V Airwash CartHEPA Filter, VOC Filter & Foam Pre-Filter
Amaircare 7500HEPA Filter, Carbon Filter & Foam Pre-Filter (Optional VOC Filter)
Amaircare 7500 Airwash CartHEPA Filter, VOC Filter & Foam Pre-Filter
Amaircare 8500HEPA Filter, Carbon Filter & Foam Pre-Filter (Optional VOC Filter)
Amaircare Airwash Whisper 350HEPA Filter, VOC Filter & Foam Pre-Filter
Amaircare Airwash Whisper 675HEPA Filter, VOC Filter & Foam Pre-Filter
Amaircare Roomaid 2001301HEPA Filter, VOC Filter & Pre-Filter
Atmosphere 101076Cleanable Pre-Filter, Carbon Filter & HEPA Filter
Austin Air Allergy MachinePolyester Pre-Filter, Medical Grade HEPA Filter & HEGA Filter with Activated Military Carbon Cloth
Austin Air Allergy Machine Jr.Polyester Pre-Filter, Medical Grade HEPA Filter & HEGA Filter with Activated Military Carbon Cloth
Austin Air Baby’s BreathPolyester Pre-Filter, Medical Grade HEPA Filter & HEGA Filter with Activated Military Carbon Cloth
Austin Air Bedroom MachinePre-Filter, HEPA Filter, HEGA Carbon Cloth & Proprietary Carbon Blend
Austin Air HealthMatePolyester Pre-Filter, HEPA Filter & Carbon, Zeolite Gas Phase
Austin Air HealthMate Jr.Polyester Pre-Filter, HEPA Filter & Carbon, Zeolite Gas Phase
Austin Air HealthMate+Polyester Pre-Filter, HEPA Filter & Carbon, Zeolite and Potassium Iodide Gas Phase
Austin Air HealthMate+ Jr.Polyester Pre-Filter, HEPA Filter & Carbon, Zeolite and Potassium Iodide Gas Phase
Austin Air Pet MachinePolyester Pre-Filter, Medical Grade HEPA Filter & Specialty Carbons/Zeolite Blend
Bionaire BAP1400-UPERMAtech HEPA Type Filter
Bionaire BAP1412-UPERMAtech HEPA Type Filter
Bionaire BAP1525RCW-UWashable Pre-Filter & PERMAtech HEPA Type Filter
Bionaire BAP1700-UPERMAtech HEPA Type Filter
Bionaire BAP260-UHEPA Filter
Bionaire BAP825WO-UHEPA Filter
Bionaire BAP9700-UPERMAtech HEPA Type Filter
Bionaire BAP9700S-UHEPA Filter
Bionaire BAP9900UV-CNUPhotocatalyst (TiO2) Filter, HEPA Filter & Germicidal UV Light
Blueair 203HEPA + Electrostatic, Activated Carbon
Blueair 303HEPA + Electrostatic, Activated Carbon
Blueair 403HEPA + Electrostatic, Activated Carbon
Blueair 450EHEPA + Electrostatic, Activated Carbon
Blueair 503HEPA + Electrostatic, Activated Carbon
Blueair 603HEPA + Electrostatic, Activated Carbon
Blueair 650EHEPA + Electrostatic, Activated Carbon
Blueair ECO10HEPA + Electrostatic, Activated Carbon
CFM CX10005 micron Pre-Filter, 0.3 micron HEPA Filter
Coway AP-0509DHPre-Filter, Medium Deodorization Filter & Anti-flu HEPA Filter
Coway AP-0510CHPre-Filter, Custom Filter & Anti-Flu HEPA Filter
Coway AP-1005AHPre-Filter, Meduim Filter, Anti-Flu HEPA Filter, Allergy Shield Filter & Deodorization Filter
Coway AP-1008CHPre-Filter, A3 Meduim Filter & Anti-flu HEPA Filter
Coway AP-1009CHPre-Filter, Medium Deodorization Filter & Anti-flu HEPA Filter
Coway AP-1506DHPre-Filter, Option Filter, Active Carbon Deodorization Filter & True HEPA Filter
Coway AP-1510BHPre-Filter, Custom Filter, Deodorization Filter & Anti-Flu HEPA Filter
Coway AP-2505CHHEPA, pre-filter
Coway AP-3008FHPre-Filter, Custom Filter, Deodorization Filter & Anti-Flu HEPA Filter
Coway APM-1510FHPre-Filter, Custom Filter, Deodorization Filter & Anti-Flu HEPA Filter
Crane EE-50645 Level Filtration: HEPA Filter, Acrtive Caron Filter, Photocatalyst Filter, Particle Filter Foam & Germicidal UV Light
Crane EE-50655 Level Filtration: HEPA Filter, Acrtive Caron Filter, Photocatalyst Filter, Particle Filter Foam & Germicidal UV Light
Dr. Caboodle Air PurifierAnti-Microbial Pre-Filter, HEPA Filter & Activated Carbon Filter w/ UV-C Germicidal Lamp
Dr. Caboodle Legacy Air PurifierAnti-Microbial Pre-Filter, HEPA Filter & Activated Carbon Filter
Funglan KJ-101Anti-bacterial Pre-Filter, HEPA Filter & Active Carbon Filter
Funglan KJ-21PP Filter, HEPA Filter, Cold Catalyst Filter, Activated Carbon Filter & Ionizer
Funglan KJ-22PP Filter, HEPA Filter, Cold Catalyst Filter, Activated Carbon Filter & Ionizer
Funglan KJ-23APP Filter, HEPA Filter, Cold Catalyst Filter, Activated Carbon Filter & Ionizer
Funglan KJ-23BPP Filter, HEPA Filter, Cold Catalyst Filter, Activated Carbon Filter & Ionizer
Funglan KJG-180AHEPA Filter, Washable Antibacterial Filter, Ionizer, Photocatalyst Filter & UV Light
Funglan KJG-180BHEPA Filter, Washable Antibacterial Filter, Ionizer, Photocatalyst Filter & UV Light
Funglan KJG-180CHEPA Filter, Washable Antibacterial Filter, Ionizer, Photocatalyst Filter & UV Light
General Electric AFHC09AMHEPA Filter & Washable Pre-Filter
General Electric AFHC21AMHEPA Filter & Washable Pre-Filter
General Electric AFHC32AMHEPA Filter & Washable Pre-Filter
Germ Guardian AC4010HEPA Filter, Charcoal Filter, PCO Filter & UV Technology
Germ Guardian AC4825Pre-Filter, HEPA Filter, Charcoal Filter & UV Technology
Germ Guardian AC5000 HEPACombo HEPA (Pre-Filter, HEPA, Photocatalyst & Charcoal Filter)
Haier HAPE200HEPA & Active Carbon Filter
Haier HAPE300HEPA & Active Carbon Filter
Haier HAPM100HEPA & Active Carbon Filter
Hamilton Beach Air DecorHEPA Filter
Hamilton Beach TrueAir 04384Permanent Pre-Filter, HEPA Grade Filter & Carbon Filter
Hamilton Beach TrueAir Ecoclean 04493HEPA Filter & Carbon Filter
Holmes HAP1200-UPermanent Filter, HEPA Filter & Pre-Filter
Holmes HAP223HEPA Filter
Holmes HAP2400B-UHEPA Filter
Holmes HAP242-TU1HEPA Filter
Holmes HAP412W-TUHEPA Filter
Holmes HAP422RC-TUHEPA Filter
Holmes HAP424-UHEPA Filter
Holmes HAP706-UHEPA Filter & Washable Pre-Filter
Holmes HAP716-UHEPA Filter & Washable Pre-Filter
Holmes HAP726-UHEPA Filter & Carbon Filter
Holmes HAP756-UHEPA Filter
Holmes HAP8615-UHEPA Filter
Holmes HAP9240-UHEPA Filter
Holmes HAP9412B-UHEPA Filter
Holmes HAP9412W-UHEPA Filter
Holmes HAP9424B-UHEPA Filter
Holmes HAP9424W-UHEPA Filter
Honeywell 16200HEPA Filter & Washable Pre-Filter
Honeywell 17000-SPermanent HEPA w/ Carbon Pre-Filter
Honeywell 50150-NPermanent HEPA w/ Activated Carbon Pre-Filter
Honeywell 50250-NHEPA Filter & Carbon Pre-Filter
Honeywell HHT-011HEPA Filter
Honeywell HHT-080HEPA Filter
Honeywell HHT-081HEPA Filter
Honeywell HHT-090Permanent HEPA Filter & Washable Pre-Filter
Honeywell HHT-145HEPA Filter, Zeolite Pre-Filter & UV technology
Hunter HEPAtech 30027HEPA Filter
Hunter HEPAtech 30057Pre-Filter & HEPA Filter
Hunter HEPAtech 30067Pre-Filter & HEPA Filter
Hunter HEPAtech 30124Pre-Filter & HEPA Filter
Hunter HEPAtech 30180Pre-Filter & HEPA Filter
Hunter HEPAtech 30526Pre-Filter & HEPA Filter
Hunter HEPAtech 30710Pre-Filter & HEPA Filter
Hunter HEPAtech 30715Pre-Filter & HEPA Filter
Hunter HEPAtech Tower 30836Pre-Filter, HEPA Filter & UVC Germicidal Technology
Hunter HEPAtech Tower 30841Pre-Filter, HEPA Filter & UVC Germicidal Technology
Hunter HEPAtech Tower 30847Pre-Filter, HEPA Filter & UVC Germicidal Technology
Hunter PermaLife 30190Pre-Filter & HEPA Filter
Hunter PermaLife 30547Activated Carbon Pre-Filter & Permanent HEPA Filter
Hunter PermaLife 30748Activated Carbon Pre-Filter & Permanent HEPA Filter
Hunter PermaLife 30756Activated Carbon Pre-Filter & Permanent HEPA Filter
Hunter QuietFlo 30085Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30090Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30245Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30401Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30402Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30730Activated Carbon Pre-Filter & True HEPA Filter
Hunter QuietFlo 30736Activated Carbon Pre-Filter & True HEPA Filter
IQAir Cleanroom H13HyperHEPA & PreMax Pre-Filter w/ Antimicrobial Agent
IQAir CleanZoneDouble V Design Filter & HyperHEPA Filter
IQAir HealthProMini-Pleat Pre-Filter & HEPA Filter
IQAir HealthPro CompactMini-Pleat Pre-Filter & HEPA Filter
IQAir HealthPro PlusMini-Pleat Pre-Filter, HEPA Filter & Carbon Alumina Potassium Permanganate Filter
Kenmore AC-2062Cleanable HEPA-Type & Pre-Filter
Kenmore PlasmaWave 85150True HEPA Filter & Activated Carbon Filter
Kenmore PlasmaWave 85300True HEPA Filter & Activated Carbon Filter
Kenmore PlasmaWave 85450True HEPA Filter & Activated Carbon Filter
LG PS-M55016 Step Filtration: HEPA Filter, Allergen Filter & NPI Sterilization
LG PS-MK45011 Step Filtration: HEPA Filter, Allergen Filter & NPI Sterilization
LG PS-N550WP16 Step Filtration: HEPA Filter, Allergen Filter & Odor Filter
LG PS-P70010 Step Filtration: HEPA Filter & Allergen Filter
LG PS-P80010 Step Filtration: HEPA Filter & Allergen Filter
LG PS-S200WC6 Step Filtration: HEPA Filter, Pre-Filter & Carbon Filter
Neoair BabyAirPre-Filter, HEPA Filter & Activated Carbon
Neoair CruiserMulti-Stage Air Filtration: UV Light, Photo-calystic, HEPA Filter & Activated Carbon
Neoair ENVIRO 68108Prescreening Filter, HEPA Filter, Activated Carbon Filter & Advanced OFS Filter
Neoair Enviro PLUSPre-Filter, Super HEPA Filter & Advanced OFS Filter
Neoair MarineMulti-Stage Air Filtration: UV Light, Photo-calystic, HEPA Filter & Activated Carbon
NQ 1000Pre-Filter, HEPA Filter & Germicidal UV
NQ 2000Pre-Filter, HEPA Filter & Germicidal UV
NQ 250Pre-Filter, HEPA Filter & Germicidal UV
NQ 400Pre-Filter, HEPA Filter & Germicidal UV
NQ 500Pre-Filter, HEPA Filter & Germicidal UV
NQ Clarifier MedicalPre-Filter, Activated Carbon Filter, HEPA Filter, Carbon Post Filter & Germicidal UV
NQ Clarifier StandardPre-Filter, Activated Carbon Filter, HEPA Filter, Carbon Post Filter & Germicidal UV
Oransi v-hepa PRO UVPre-Filter, High Efficiency V-HEPA Filter, Photocatalytic Oxidation Filter, Activated Carbon Filter & Germicidal UV Lamp
Panasonic F-P10HU1HEPA Filter & Deodorizing Filter
Panasonic F-P15HU2HEPA Filter
Panasonic F-P20HU1HEPA Filter
Pure Air 1200HS PlusPre-Filter, Carbon Filter & HEPA Filter
Pure Air 2000HS PlusPre-Filter, Carbon Filter & HEPA Filter
Pure Air 600HSPre-Filter, Carbon Filter & HEPA Filter
Pure Air 600HS PlusPre-Filter, Carbon Filter & HEPA Filter
Pure Air HPS 350Pre-Filter, Carbon Filter & HEPA Filter
Pure Air HPS 500Pre-Filter, Carbon Filter & HEPA Filter
Rabbit Air BioGS SPA-421APre Filter, HEPA Filter, Charcoal Filter & Negative Ions
Rabbit Air BioGS SPA-421A BCRF Special EditionPre Filter, HEPA Filter, Charcoal Filter & Negative Ions
Rabbit Air BioGS SPA-582APre Filter, HEPA Filter, Charcoal Filter & Negative Ions
Rabbit Air MinusA2 SPA-700APre Filter, Medium Filter, HEPA Filter, Customized Filter , Charcoal Filter & Negative Ions
Rabbit Air MinusA2 SPA-780APre Filter, Medium Filter, HEPA Filter, Customized Filter , Charcoal Filter & Negative Ions
Riccar EcoPureHEPA Filter
Riccar RAPLPre-Filter, HEPA Filter, Carbon Filter & PlasmaWave
Riccar RAPMPre-Filter, HEPA Filter, Carbon Filter & PlasmaWave
Sharp FP-P30UPre Filter, HEPA Filter & Carbon Filter
Sharp FP-P35CXHEPA Filter
Sharp FP-P40CXHEPA Filter
Sharp FP-P60CXPre Filter, HEPA Filter & Carbon Filter
Sharp FP-R30CXHEPA Filter & Carbon Filter
Sharp FP-R45CXPre Filter, HEPA Filter & Carbon Filter
Sharp FP-R65CXPre Filter, HEPA Filter & Carbon Filter
Sharp KC-830UPre Filter, HEPA Filter, Active Carbon Filter & Humidifying Filter
Sharp KC-850UPre Filter, HEPA Filter, Active Carbon Filter & Humidifying Filter
Sharp KC-860UPre Filter, HEPA Filter, Active Carbon Filter & Humidifying Filter
Sharp KC-C100UPre Filter, HEPA Filter, Active Carbon Filter & Humidifying Filter
Sharp KC-C150UPre Filter, HEPA Filter, Active Carbon Filter & Humidifying Filter
Sun Pure SP-20Micron Pre-Filter, Activated Cocunt Carbon Pleat, Hospital Grade HEPA Filter & UV Light
Sun Pure SP-20CMicron Pre-Filter, Hospital Grade HEPA Filter, Activated Carbon, Zeolite & Potassium Permanganate & UV Light
Tiger AKH-A25UTrue HEPA Filter & Activated Charcoal Filter
Vollara FreshAir HEPAPre-Filter, HEPA Filter w/ Activated Carbon
Vornado AQS15True HEPA Filter & PreSorb Pre-Filter
Vornado AQS35True HEPA Filter & PreSorb Pre-Filter
Westinghouse WAP6116 Stage Purification System: Pre-Filter, Activated Carbon & HEPA Filter
Westinghouse WAP8118-Stage Purification System: Pre-Filter, Activated Carbon, Complex Silicon Filtration, Nano-Silver Anti Bacteria Filter & HEPA Filter
Westinghouse WAP8128-Stage Purification System: Pre-Filter, Activated Carbon, Complex Silicon Filtration, Nano-Silver Anti Bacteria Filter & HEPA Filter
Whirlpool Whispure 250Charcoal Pre-Filter & HEPA Filter
Whirlpool Whispure 450Charcoal Pre-Filter & HEPA Filter
Whirlpool Whispure 510Charcoal Pre-Filter & HEPA Filter
Whirlpool Whispure APR45230LCharcoal Pre-Filter & HEPA Filter
Winix PlasmaWave 5000Pre-Filter, HEPA Filter, Nano-Silver Mesh, Carbon Filter & PlasmaWave Technology
Winix PlasmaWave 5000BCarbon Pre-Filter, HEPA Filter & PlasmaWave Technology
Winix PlasmaWave 5300Carbon Pre-Filter, HEPA Filter & PlasmaWave Technology
Winix PlasmaWave 9000Pre-Filter, HEPA Filter, Nano-Silver Mesh, Carbon Filter & PlasmaWave Technology
Winix PlasmaWave 9000SHEPA Filter
Winix WAC-5000SPre-Filter, HEPA Filter, Nano-Silver Mesh, Carbon Filter & PlasmaWave Technology
Zojirushi UltraSlim PA-LTC10HEPA Filter
Zojirushi UltraSlim PA-MTC14HEPA Filter
Air Purifier Guides & Reviews
Logo
Compare items
  • Total (0)
Compare
3