Advanced HEPA+ Air Purifier


Our National brand Advanced HEPA+ is made exclusive to our specifications and control, and is specifically made to help people with allergies, asthma, or mild chemical sensitivities. A True Medical‐Grade HEPA filter plus 15 lbs of activated carbon remove 99.97% of lung‐damaging particles, odors, gases and fumes from rooms up to 1500 square feet. Heavy‐duty casters move easily over carpets and floors. Certified HEPA filter lasts for up to 5 years, saving on costly filter replacements. Available in four popular colors.

MSRP $744.00 Selling Price $569.99
In stock

This product provides relief from: Asthma, Bacteria & Germs, Dust Allergies, Dust Mites, Fragrances & Odors, Mold & Mildew, Pet Dander, Pollen

Buyers Guide: Air Purifiers

Choosing a Portable Air Purifier


When your allergies are acting up, one of the best ways to feel better fast is to get away from whatever is causing the reaction.  Sometimes simply opening a window can ventilate a room with clean air and provide relief. Other times, weather makes this option impossible or allergens may also be present in the new air.  In such a case, an air cleaning system may be useful.

Air cleaners remove allergens from indoor air.  They can be installed in the ductwork of a home’s central heating, ventilating, and air-conditioning (HVAC) system to clean the air in the whole house or a portable room system can be used to clean the air in a single room only.   Installing a whole-home system may not be in your current budget, but depending on the type of allergy you are suffering from, a portable system may be sufficient for your needs and your wallet.

Types of Air Cleaners

There are a variety of air pollutants that can cause allergic reactions.    Air pollutants fall into two categories:  particulate matter and gaseous pollutants.  Particulate matter includes dust, smoke, pollen, animal dander, tobacco smoke, dust mite allergen, and mold spores.  Gaseous pollutants include the vapors from gas cooking stoves, vehicle exhaust, paints and pesticides.    Choosing the best air cleaner depends on the type of allergen causing your individual reactions.  Different air cleaners are better at removing particulate matter from the air while others are preferred for removing gaseous pollutants.

For example, if you are particularly sensitive to dust mite allergen, waking up each morning stuffy and sneezing, you should consider a particulate matter air cleaner in your bedroom.  The EPA has divided them into two types: mechanical and electronic.  Mechanical air filters use a fan to pull air through filters where particles become trapped and cannot escape back into the air. High Efficiency Particulate Air (HEPA) filters fall into this category.

Electronic air cleaners use a process called electrostatic attraction to trap particles.  They also use a fan to draw air in, however the air then passes through a section of the machine where the particles are given an electrical charge.  The charged particles are drawn to a series of flat plates called a collector where they accumulate until the filter is replaced or cleaned.    Although the process is similar, air cleaners called ionizers or ion generators do not have a collector.  They simply charge the airborne particles and expel them back into the air where they attach to nearby surfaces, such as walls or furniture, or attach to one another causing them to settle faster until they can be vacuumed or cleaned up.

If paint fumes or other household odors are bothering you, an air cleaner that removes gaseous pollutants is a better choice.  Gaseous air filters remove gases and odors by using a material, such as activated carbon, to absorb the pollutants.  These filters are typically intended to remove one or more gaseous pollutants from the air that passes through them, but may be specific to one or two types of gas.  It is important to choose an air purifier that is designed to remove the specific gas or odor that is affecting you.

In addition to air cleaners that using a filtering process to remove allergens from the air, there are also systems that will actually destroy pollutants.  Some use ultraviolet (UV) light technology.  These cleaners are called ultraviolet germicidal irradiation (UVGI) cleaners and photocatalytic (PCO) cleaners.  UVGI cleaners use radiation from UV lights that may destroy viruses, bacteria, allergens and mold.  Typically such systems are used in conjunction with an air filtration system.  PCO cleaners use a UV lamp along with a substance called a catalyst that reacts with the light.  They are intended to destroy gaseous pollutants by converting them into harmless products, but do not actually remove particulate matter from the air.

One more type of pollutant destruction system is an ozone generator.  It uses a UV light or an electrical discharge to intentionally produce ozone.  However, as you may know, ozone is a lung irritant that can cause adverse health effects.  Ozone also has little effect in removing most indoor air contaminants, thus are not always the safest or most effective choice.


(Mechanical or Electronic)

Air filters Particles Ineffective in removing larger particles because most settle from the air quickly and never reach filters.
Gas-phase filters Gases Used much less frequently in homes than particle air filters. The lifetime for removing pollutants may be short.

Other Air Cleaners

UVGI Biologicals Bacterial and mold spores tend to be resistant to UV radiation and require more light or longer time of exposure, or both, to be killed.
PCO Gases Application for homes is limited because currently available catalysts are ineffective in destroying gaseous pollutants from indoor air.
Ozone generators Particles, gases, biologicals Sold as air cleaners, they are not always safe and effective in removing pollutants. By design, they produce ozone, a lung irritant.


Measuring the Effectiveness of an Air Cleaner

The effectiveness of a portable air cleaner, regardless of what you are trying to remove from the air, is measured by the clean air delivery rate (CADR).  Developed by the Association of Home Appliance Manufacturers, the CADR is a measure of the cleaning speed.  Since individual filters vary in their ability to remove different particles, three CADR's for a given device are typically measured: smoke, pollen, and dust.  While an individual portable system may not achieve its rated measure under all circumstances, it does allow comparison between different makes and models.  Typically, the higher the CADR, the more effective the air cleaned will be.  When purchasing a system for your personal use, choose one with the highest CADR for your specific allergy. If you are treating a pollen allergy, consider a purifier with a high CADR for pollen, as stated on the label.

When looking at the CADR ratings, you must also take into account the size of the space in which you will be using your air cleaner.  Portable air purifiers are only meant to clean the air in a single room, not your entire house.  Therefore, if you are having problems at night and when you wake up in the morning, you may want to purchase a particulate matter air purifier specifically for your bedroom.  If you are also concerned about odors in the kitchen, you should consider a gas-phase unit for the kitchen area.  Regardless of what type you choose, you must have an accurate measurement of the square footage and in some cases, the cubic footage for that particular room in order to choose a machine that will be effective.

To calculate your room’s approximate square footage, multiply the length of the room in feet by the width of the room in feet.  To calculate the cubic footage, multiply the length of your space by the width of your space and multiply that by the ceiling height.  Most manufacturers list an optimal square foot area of coverage for their air purifiers, so you'll want to choose a model that is rated to cover the size of your room.  You might also consider choosing a model designed for an area larger than yours for better cleaning at a lower, quieter speed.

Another important measure of unit effectiveness is the cubic feet per minute (CFM) rating. This number represents how many cubic feet of air passes through the unit in any given minute. It gives you an idea of how quickly an air purifier will clean the complete volume of air in your room. Typically, the higher an air purifier's CFM rating, the faster the air in the room will be purified. One more measurement is the air changes per hour (ACH). ACH indicates how many times an air purifier filters the entire volume of air in your space per hour. Those who are looking for relief from allergies and asthma should look for an air purifier that can produce at least 3 to 4 air changes per hour.

Noise Levels

Once you have determined what allergens you need to remove from the air and what size system will work best in your room, there are several ways to narrow down your choice of air cleaner based on your personal preferences.  Noise is an important one, especially if the unit will be used in the bedroom.

Because of the fan element, most air purifiers will emit some amount of noise, depending on the purification speed you choose. Some people need complete silence while sleeping while others enjoy “white noise” in the background.  If noise is a concern to you, look for an air purifier with a decibel (dB) rating for each fan speed. You can compare these ratings to the sounds made by other common household items which in turn will give you a better idea of the level of sound an air purifier will make.

0 dB Hearing Threshold
10 dB Breathing
20 dB Falling Leaves
30 dB Whisper
40 dB Raindrops
50 dB Average Home
60 dB Normal Conversation
70 dB Vacuum Cleaner

While a decibel chart can be helpful, remember that other factors, such as where in the room the purifier is placed, the amount of furniture and choice of flooring can also affect the noise level while the unit is in use.   Many units come with multiple fan speeds.  If noise is a particular concern to you, the option of a lower fan speed may be something to consider.

Other special features that may decrease the amount of noise are a programmable timer and a remote control.  A remote control allows you to turn the unit off and on or change fan speeds without having to leave the comfort of your bed or sitting area.  A programmable timer can be used to automatically turn the system on or off at certain times of the day or night to cut down on noise and to save energy.

In addition, manufacturers offer a variety of other special features to consider when buying an air purifier.  Some offer digital controls for setting fan speeds and timers easily and accurately.  If you think you will be moving your unit from room to room, you might want to look for a one with carrying handles or wheels for easy relocation.  Some systems even come with air quality monitors to sense the level of pollution in a room and filter replacement lights to let you know when to change the filter.

As with any purchase, the more features you opt for, the more likely the cost will increase.  So, in deciding which unit is best for you and your budget, don’t forget to think about maintenance costs.  Look at the cost of replacing filters and how often they need to be replaced in order to get an accurate idea of the true cost of an air cleaning system before buying.  Some brands are designed to need new pre-filters every three months and new HEPA filters every year. Others have filter packs that last up to 5 years.  When filters are not replaced regularly some filtration ability is lost and the motor of the unit could be damaged, so it is important to invest in the maintenance of your unit as well as the unit itself.

Our National brand Advanced HEPA+ Air Purifier is made exclusive to our specifications and control (cleans air in rooms up to 1500 square feet), and provides much more than just True HEPA filtration. According to the EPA…“Indoor pollution sources that release gases or particles into the air are the primary cause of indoor air quality problems in the home,” where “health effects…may be experienced soon after or, possibly, years later.” Therefore, in addition to filtering allergens and other particles with 99.97% True HEPA efficiency to 0.3 microns, the Advanced HEPA+ also uses 15 pounds of an activated carbon blend to remove gaseous pollutants from indoor air. This tremendous level of filtration power, together with the amount of air it processes, mean the Advanced HEPA+ can help to significantly reduce exposure to the indoor air pollutants responsible for triggering allergies and asthma, and causing harmful health effects.

The U.S. Environmental Protection Agency (EPA) warns that “Indoor air pollution is among the top five environmental health risks” facing us today, indicating that room air cleaners can help reduce this risk, accompanied by pollutant source control and good ventilation. According to the EPA, an air cleaner must be both efficient (in terms of the percentage of particles and gaseous pollutants removed) and effective (in terms of the amount of air being filtered). All other factors being equal, the higher these two numbers, the more likely an air cleaner will be in actually reducing a room's gases and particle counts.

Why the National brand Advanced HEPA+ Air Purifier?

    • Superior Filtration ‐ Particles, Gases, Odors and VOCs

      The Advanced HEPA+ provides 4 stages of intense filtration. What sets the Advanced HEPA+ apart from other True HEPA systems is its filters. The Advanced HEPA+ contains 60 square feet of True Medical-Grade HEPA filter media (to trap sub-micron particles). The HEPA is surrounded by 15 pounds of granular carbon/zeolite (to 'adsorb' odors, gases, formaldehyde, ammonia, and carbon monoxide). The specially made activated carbon is highly porous, producing a much larger surface area, which enhances and extends its performance. Two pre-filters block larger particles – one that surrounds the carbon/zeolite filter, the other that wraps around the interior of the unit's housing.  The power of this filtration in capturing particles and gaseous pollutants puts the Advanced HEPA+ at the top of its class.

  • Designed for Performance

    The Advanced HEPA+ processes 250 cubic feet of air every minute. Air is drawn in from all sides of the unit via its 360° air intake grilles, where it immediately begins to be pulled through the 4-stage filter, which progressively removes dust, hair, fibers, odors, gases, VOCs, Radon daughters, pollen, pet dander, mold spores, bacteria, viruses, and other allergens and contaminants.

    The Advanced HEPA+ features high-velocity airflow, capable of cleaning up to 1500 square foot room in 15-20 minutes. The unit's powerful fan produces an airflow of 400 cfm (cubic feet per minute) on high, 200 cfm on medium, and 75 cfm on low. Running the unit on high with the door closed helps to quickly create a pocket of clean air around the user.

    The Advanced HEPA+ produces 50-66 dBA (decibels) of noise, depending on fan speed selected. Customers report it to be very quiet on the low setting. Set at high, the sound approximates that of a normal conversation. Many customers use the high setting for quick or maximum air cleaning.

    The Advanced HEPA+ is solidly made. Each unit is built using 22-gauge welded steel that does not rattle or vibrate, even at max speed. A powder-coated finish (baked at 375°F) does not off-gas and lends durability. The Advanced HEPA+ comes equipped with heavy-duty casters for easy portability on either floors or carpets.

    The Advanced HEPA+ saves energy. An energy efficient PSC motor, equipped with a centrifugal fan, uses less energy than some light bulbs. Electricity to run the unit on Low (56 watts) should cost about half a penny an hour, on Medium (83 watts) about 1 cent and hour, and on High (135 watts) about 1.5 cents an hour. (Rates are based on average residential electricity rates projected by the United States EIA for 2014-2015.)

  • Made in USA

    Our National brand Advanced HEPA+ is made exclusive to our specifications and control and is made right here in the USA by American workers dedicated to making the best possible air purifiers for those whose lives are affected by respiratory illness or discomfort.


  • Product Integrity

    The Advanced HEPA+ undergoes tough government and third-party testing, whose stringent standards must be met to ensure the product performs as claimed. Product testing is conducted by accredited and well-respected testing laboratories, and has included tests on flow design, airflow rate, and gas, odor and particle removal.


  • Ease of Use and Low Maintenance

    The Advanced HEPA+ comes ready to be plugged in. The unit comes with two filters ‐ the outer pre-filter, and the HEPA filter assembly. All models use a manual rotary dial to switch between 3 fan speeds ‐ High (III), Medium (II) and Low (I). The unit can be placed anywhere in a room, but should be at least 4-8 inches from a wall for maximum effectiveness.

    Advanced HEPA+ filters are designed to last up to five years, which saves on the hassle and cost of frequent filter replacements. If filters do need to be replaced, the process is straightforward and should take only a few minutes. Although the bottom cover must be removed using a Phillips-head screwdriver (4 screws), filters just lift out for easy replacement. The outer surface of the units need only be vacuumed monthly to remove dust particles that may accumulate on the exterior air intake grilles.

The Advanced HEPA+ provides clean air in rooms up to a maximum of:

  • 1500 sq. ft. (1 air change per hour)
  • 750 sq. ft.   (2 air changes per hour)
  • 375 sq. ft.   (4 air changes per hour)
  • 187 sq. ft.   (8 air changes per hour)

Advanced HEPA+ Features:

  • Helps reduce exposure to particulates that cause allergic reaction or respiratory distress
  • Also helps to significantly reduce odors, gases, chemical vapors, fumes, and some VOCs
  • Unmatched 4-Stage Filtration Power:
    • Stage 1:  Large Particle Pre-Filter removes dust, hair, and pet dander
    • Stage 2:  Medium Particle Pre-Filter removes pollen, molds, and other spores
    • Stage 3:  Activated Carbon and Zeolite (15 lbs) removes gases, odors, fumes, and VOCs
    • Stage 4:  True Medical-Grade HEPA (60 sq ft) removes allergens, bacteria, viruses, and other particulates:
      • 99.97% removal of particles larger than 0.3 microns
      • 99.5% removal of particles larger than 0.1 micron
  • Powerful 360° air intake system maximizes efficiency and speeds delivery of filtered air
  • Air outlet at upper-side can be directed where you need it most
  • Energy efficient PSC motor, rated for continuous use at high RPM
  • Low cost of ownership ‐ no filter changes for up to 5 years
  • 3-speed rotary dial  (low, medium, high)
  • Solid steel construction
  • Heavy-duty, easy-roll casters
  • 23"H x 14.5"W x 14.5"D ‐ 45 lbs
  • Baked-on powder coat does not off-gas
  • Ozone free
  • Made in USA
  • 10-Year Manufacturer's Limited Warranty
More Information

The Advanced HEPA+ provides great overall protection for allergies, asthma, and milder chemical sensitivities. Four levels of intense filtration work in concert to remove the indoor air pollutants known to irritate the respiratory tract or to have negative effects on health. This True HEPA purifier also includes 15 pounds of activated carbon/zeolite to adsorb the many gaseous pollutants that most other purifiers cannot.

Room Size

up to 1500 sq. ft. max

Recommended For

Allergies, asthma, odors, gases, and chemicals

Best Fit

Ideal for allergy and asthma sufferers, those with mild chemical sensitivity, or those wanting better indoor air quality

True HEPA Filtration


Particle Filtration Efficiency

99.97% to 0.3 microns
99.5% to 0.1 micron

Particle Removal

Dust, dust mite allergen, pollen, pet dander, mold spores, bacteria, viruses

Gas and Odor Removal

Tobacco smoke, chemical vapors, radon daughters

VOC Removal


Optional Filters


Unique Features / Benefits

Filters last up to 5 years. Low maintenance. Made in USA.

CADR: Dust rating

Not tested by AHAM

CADR: Pollen rating

Not tested by AHAM

CADR: Smoke rating

Not tested by AHAM

ACH (air changes per hour)

ACH per room size:

  • 1500 sq. ft. (1 air change per hour)
  • 750 sq. ft.   (2 air changes per hour)
  • 375 sq. ft.   (4 air changes per hour)
  • 187 sq. ft.   (8 air changes per hour)
Airflow (cubic feet per minute)

• Low ‐ 75 cfm
• Med ‐ 200 cfm
• High ‐ 400 cfm

Filtration System

4-stage filtration:
• Large particle pre-filter
• Medium particle pre-filter
• 15-lb. carbon/zeolite filter
• 60 sq. ft. True HEPA filter

Number of Filters to Replace

1 filter pack (includes all filters)
Note: Outer pre-filter can be replaced separately, if needed

Replace HEPA Filter

5 years ‐ HEPA filter pack (normal use)

Replace Pre-Filter

See above ‐ part of HEPA filter pack

Replace Other Filters

See above ‐ part of HEPA filter pack

Dimensions (H x W x D) 23" x 14.5" x 14.5"
Color choices

Black, White, Sandstone, Midnight Blue

Product Weight

45 lbs

Packaged Weight

53 lbs

Shipping Weight

53 lbs

Noise Level - (min-max decibels)

• Low ‐ <50 dB(A)
•Med ‐ 55 dB(A)
•High ‐ 66 dB(A)


Manual ‐ rotary dial

Remote Control


Number of Fan Speeds


LCD Display




Programmable Cycles or Timer


Sleep Mode


Auto Fan Mode (auto adjusts based on air quality)


Particle, Gas or VOC Detector


Filter Status Indicator


Filter Reset function


Other Indicators


Other Features


Casters or Handles


Air Inlet

360° ‐ all sides

Air Outlet

Upper deck ‐ right side

Housing Construction

22-gauge steel. Baked-on powder coat paint finish.

Fan / Motor Assembly

Plastic centrifugal fan. 3-speed control. Long-duty PSC motor, rated for continuous high RPM.

Energy Consumption (watts)

• Low ‐ 56 W
• Med ‐ 83 W
• High ‐ 135 W

Power Requirements

120 V, 60 Hz

Power Plug

Cord approx. 5-6 feet, 2-prong polarized plug


• Low ‐ 0.5 Amp
• Med ‐ 0.7 Amp
• High ‐ 1.1 Amps

Energy Star®


AHAM-certified CADR


Approvals / Other Certifications

CSA approved. California ARB certified.

Ozone Emission


Manufacturer's Warranty

10-Year Limited

The National Brand Advanced HEPA+ Air Purifier Instructions

Please see Owner's Manual tab for full instructions on changing the filter pack.

General on Pre-Filter:

  • The outer Stage 1 pre-filter (which you can see can through the unit's perforated grille) can last for years with regular cleaning. Just vacuum the outer surface of the unit monthly (you do not need to open the unit) by using the brush attachment of your vacuum to remove dust from the outside of the unit and large particles from the pre-filter.

  • If you do not maintain the outer Stage 1 pre-filter or if it becomes damaged, genuine Advanced HEPA+ replacement filters are available through National Allergy.

General on HEPA Filter:

  • Advanced HEPA+ filters are designed to last up to 5 years. However, please remember that the filter's service life is related to the volume of air that passes through the air purifier and the amount of contaminants in the air. If your indoor air has an unusually high level of airborne particulates, smoke or gaseous contaminants, the filter's service life may be shortened.

  • Regular maintenance helps to prolong the life of the HEPA filter. Keep the area surrounding the air purifier clean, and be sure to vacuum any dust buildup on the outside of the unit, especially on the 360° air intake grille.

  • Replace the HEPA filter pack if you notice a significant drop in clean, odorless air flow.

  • Caution:  Filter may have sharp edges. Please wear gloves when servicing the filter.

  • Important ‐ For first-time use or any time you change the HEPA filter pack, it is important that you run the purifier on the High (III) setting for at least the first hour of use. After the first hour, turn the Speed Control Setting to the desired level.

Click here to view the Owner's Manual for the Advanced HEPA+.

Click here for a one-page set of instructions on filter changes for the National brand Advanced HEPA+ Air Purifier.

Sorry, Advanced HEPA+ air purifiers cannot be shipped to PO boxes, military addresses,
or outside of the United States.

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