GC™ MultiGas


#1 Rated room air purifier for MCS, odors & smoke

The GC MultiGas combines HyperHEPA particle filtration with powerful gas and odor filtration.

GC™ MultiGas: Odor Air Purifier

New Edition GC™ MultiGas


Up to 21% more clean air
Average of 16% more clean air across all fan speeds.
Learn More


32% quieter
Average of 32% less sound across all fan speeds.
Learn More


20% longer filter life
New technology extends the life of our H11 HyperHEPA pre-filter.
Learn More

10 year

10-Year warranty
Learn More

Air Purifier Removing Smoke

Don't try this at home.

Smoke chamber test proves a point.
Watch IQAir President Frank Hammes step into a smoke chamber with only an IQAir room air purifier to protect him.

Proven to stop ultrafine particles

HyperHEPA filtration in the GC MultiGas removes particles of all sizes, including ultrafine particles down to 0.003 microns.

See why particle size matters...

Ultrafine particles are smaller than 0.1 microns. By sheer number, about 90% of all airborne particles are this size. The primary source of ultrafine particles is combustion from motor vehicles, refineries, industrial plants and even cooking. Viruses are also ultrafine particles. The small size of ultrafine particles enables them to be easily inhaled, deposited into the lungs and absorbed into the blood. They have been linked to heart attacks, strokes, asthma and even cancer.

Manufacturers of ordinary air filtration systems claim only that their systems filter particles larger than 0.3 microns. IQAir is different. IQAir’s HyperHEPA filtration in the GC MultiGas is proven and certified to filter at least 95% of all particles down to 0.003 microns – the smallest particles that exist. Independent testing by laboratories and government agencies verifies the effectiveness of IQAir technology against ultrafine particles.

In addition to the HyperHEPA pre-filter in the GC MultiGas, each gas-phase cartridge is wrapped with a micro-charged post-filter sleeve that removes any additional particles released from the activated carbon adsorption and alumina pellet chemisorption media. The pre-filter and post-filter sleeves work together to deliver a Total System Efficiency of 99% at 0.3 microns or larger, and 95% of all particles down to 0.003 microns.

When it comes to protection against ultrafine particulates, IQAir is the proven choice.

The best media, more micropores

The activated carbon in the GC MultiGas preserves the maximum number of micropores. The GC MultiGas packs the chemical removal power of more than 100 gas masks.

The GC MultiGas features the best media in the industry combined with superior filter design to provide an unequaled level of protection against gases, odors, and chemicals. The four disposable gas-phase filter cartridges of the GC MultiGas feature 12 lbs. (5.4 kg.) of the highest-grade activated carbon from bituminous coal, not the lower-quality coconut-shell carbon others use. The activated carbon media is activated in a way to preserve the maximum number of micropores.

IQAir also does not use zeolite, another less effective and less expensive filtration medium. Alumina pellets impregnated with potassium permanganate remove formaldehyde from the air. The cylindrical shape of the GC MultiGas cartridges allows for optimal contact between the air and the filtration media, while offering very low air restriction. Meanwhile, post filters wrap each cylinder, preventing any media dust from being released while further improving overall system efficiency.

Up to 21% more clean air

The New Edition GC MultiGas features a more powerful fan that converts energy into more air and less sound than ever before.

The New Edition GC MultiGas features the most powerful fan ever used in a residential room air purifier. That power translates into even better air cleaning results. The new three-dimensionally optimized design now uses state-of-the-art aerodynamics to convert energy into more air and less noise. We also improved the HyperHEPA filter pleating design, which increases the filter surface area of the filter. The result of these improvements is up to 21% more clean air.

IQAir's MCS Air Purifier

Certified performance

IQAir looks beyond theoretical claims, testing the performance of each individual GC MultiGas system at the factory to ensure that it meets our strict specifications.

The results of the tests are detailed in a hand-signed Certificate of Performance, which is included with every air purifier. No GC MultiGas air purifier will be shipped from the factory unless it is certified to provide a minimum of 99% efficiency against particles.

100% Healthy technology

Many air purifiers use technology that produces potentially harmful byproducts, such as ozone, ions, chemicals and ultrafine particles.

The unrivaled performance of IQAir air filtration technology is achieved using only safe, proven, mechanical filtration technology, without generating dangerous ions, ozone or UV. Mechanical filtration is the safest, healthiest and most effective technology to clean the air. Mechanical filters such as IQAir's particle filters remove particles from the air by safely capturing them on filter materials. Why risk your health on less effective methods when IQAir offers proven protection without harmful byproducts?

Designed to deliver the purest air possible

The IQAir GC MultiGas air purifier features four stages of superior filtration, exclusive 3D UltraSeal design and 320-degree airflow.

The IQAir GC MultiGas air purifier is designed to clean the full spectrum of airborne pollutants with the very best filtration technology available at each of four stages. Air is drawn into the GC MultiGas through the bottom of the system by a powerful IQAir fan, then sequentially cleaned in a step-by-step process that delivers the purest air possible. In addition, IQAir's unique 3D UltraSeal no-leakage design prevents air from escaping back into the room without being drawn through the GC MultiGas filters. The four filtration stages include:

  1. HyperHEPA particle filtration: The first stage of filtration features a powerful HyperHEPA pre-filter that removes particles of all sizes, including ultrafine particles.
  2. Cartridge-based activated carbon adsorption: Highest-grade activated carbon is used to filter Volatile OrganicCompounds (VOCs), which are responsible for odors.
  3. Cartridge-based chemisorption: This stage destroys harmful chemicals, such as formaldehyde, by an oxidation process inside a chemically active alumina pellet.
  4. Post-filter sleeve: A post-filter sleeve wraps each gas cartridge to prevent media dust from being released.

Finally, while most air cleaners return filtered air into the room through a small, noisy outlet that generates annoying drafts, the IQAir GC MultiGas features IQAir’s unique EvenFlow Diffuser with 320-degree air delivery. Filtered air is quietly and evenly distributed in all directions.

Quietest high performance air purifiers ever.

The New Edition has an average of 32% less sound across all fan speeds, without sacrificing filter life or system efficiency.

You can now have clean, healthy air without disrupting your environment with noise. Our "fan-in-center" design places the fan motor between sound-attenuating filters. The double-walled housing effectively reduces sound transmission. Rubber suspension pads systematically isolate motor vibration from the air cleaner housing. The EvenFlow Diffuser deflects sounds back into the system while returning low turbulence and low velocity air to your room. The result is an air purifier quiet enough for your bedroom.

Made with the highest-quality ABS plastics

IQAir understands that for many people, including those with Multiple Chemical Sensitivity, any odors or chemicals in the air can be a problem.

While the GC MultiGas is unequaled in removing impurities from the air you breathe, it also goes the extra distance to avoid putting anything bad into the air as part of the air purification process. That's why GC MultiGas components include only the highest quality, non-off-gassing ABS plastics. You can count on years of reliability and sturdiness, without odors and gases being emitted by the system itself.

10-Year limited warranty

At IQAir, we are committed to providing you with the best air purifiers in the world. And we back it up 100% with this simple, straightforward warranty.

We ensure that your IQAir® GC® Series system meets or exceeds our quality guarantee. We also guarantee that your system is free from defects, or we will fix or replace it for free. This includes everything. All you have to do is register your product within 30 days of purchase to be eligible for the 10-Year Limited Warranty.

This is our simple promise. We stand 100% behind the quality of our Swiss-made air purifiers. So you can relax and breathe easy.

NOTE: IQAir limited warranties apply only to IQAir products purchased in North America directly from IQAir North America, Inc., or from an IQAir Authorized Dealer.

New Edition fan

The New Edition features the most powerful, energy-efficient fan ever in a compact room air purifier. The result is even better air cleaning.

The New Edition features the most powerful fan ever used in a compact room air purifier. That power translates into even better air cleaning results. The new three-dimensionally optimized design now uses state-of-the-art aerodynamics to convert energy into more air and less noise. IQAir systems use the highest quality fan motor available. This fan has an astonishing 1325 m³/h rating at 2750 rpm. Because each fan is individually balanced and uses steel ball bearings, it outlasts other fans by years. The IQAir New Edition fan is suspended in a housing unit that isolates the fan from the housing with eight shock absorbers to further reduce noise.

Even though the IQAir New Edition is very powerful, it still requires no more power than a conventional light bulb. At the very heart of this air purifier is the ultra-efficient centrifugal, high performance New Edition fan and its maintenance-free motor. This amazing powerhouse delivers up to 780 cubic feet of air per minute while requiring as little as 27 watts of power at the lowest speed and up to a maximum of 215 watts at the highest speed. As a result, it costs only pennies per day to run the most advanced and effective air purifier in the world.

Sophisticated controls, easy mobility

Streamlined system controls, handheld remote, a built-in handle and sturdy casters make it easy to use your IQAir system.

Every IQAir room air purifier features six fan speeds and its streamlined system controls allow you to easily program automatic operation via a day/night timer. This allows you to cut energy costs and extend filter life by using your HealthPro Series air purifier to clean the air exactly as you need it when you need it. Also, the included intelligent filter-life monitor precisely forecasts filter replacement based on actual usage and color-coded lights tell you when it's time to change each filter. Relax and let the system work for you.

A sleek and efficient handheld remote control makes it easy to manage your HealthPro Series air purifier from almost anywhere in the room. You can set the fan speed and even timer controls without getting up.

The built-in handle and sturdy casters of the HealthPro Series make it simple to roll around the room or house, providing high-performance air purification wherever you need it.

3D UltraSeal

The efficiency stated for most air cleaners is purely theoretical. Internal leakage drastically reduces the actual efficiency of most air cleaners.

IQAir systems feature patented triple sealing technology. First, a unique manufacturing process ensures that the filter media is 100 percent sealed in the filter frame. Second, our patented 3D UltraSeal ensures perfect knife-edge-in-groove sealing between filter frame and housing. Third, individual seals on each housing module ensure an airtight housing. As a result, IQAir systems have a total system efficiency that is higher than the theoretical efficiency of conventional air cleaners.

New Edition: 20% longer filter life

IQAir New Edition HyperHEPA H11 pre-filters feature technology that makes them last longer and saves you money on replacements.

IQAir’s New Edition air purifiers feature the most advanced filter-pleating pattern ever designed for a residential system. This technology not only increases airflow, but also increases particulate loading capacity by 20% on the H11 HyperHEPA pre-filter. This saves you money and reduces the frequency of filter replacements.


History of IQAir

50+ years of innovation.

See IQAir’s path from humble beginnings to the world leader of clean air technology.

#1 Rated for tobacco smoke

The less secondhand smoke you breathe, the better. The GC MultiGas excels at reducing airborne contaminants from smoke.

Exposure to environmental tobacco smoke, also known as secondhand smoke, significantly increases the risk of lung cancer and heart disease in non-smokers, as well as contributing to respiratory illnesses. We agree with this advice from the Mayo Clinic: “The best way to protect non-smokers from secondhand smoke is to not allow smoking in your home.” Still, the best solution isn't always possible and that's where an air purifier can help.

Tobacco smoke contains more than 4,000 different chemicals, 60 of which are known carcinogens. These various elements are a mix of liquids, gases, and solid particles. An air purifier cannot help protect against tobacco smoke unless it provides a high level of efficiency against both particles and gases. On the other hand, a high-efficiency air purifier with the right filtration media can help dramatically. The IQAir GC MultiGas air purifier, which offers unrivaled protection against both particles and gases, is the recommendation of most experts.

The positive effect of air purifiers in homes where secondhand smoke is an issue has been demonstrated. For example, The Johns Hopkins University School of Medicine recently reported that an air purifier can be as effective as medications in reducing asthma attacks among children in homes where one or more parents smoke. On average, the children in the study suffered 33 fewer days per year enduring severe asthma symptoms.

Note: IQAir does not endorse smoking indoors. IQAir views air cleaning as a means in reducing the effects of secondhand smoke only when smoking is unavoidable. In an environment where smoking indoors in unavoidable, smoking should be confined to only one room.

Swiss quality

Swiss Made is more than just a label of origin. It is a sign of outstanding quality, uniqueness, superior design, innovation, precision and reliability.

In an industry where most air cleaners don't meet manufacturers' claims, we test and certify each and every IQAir air purification system. We manufacture our air purifiers at our state-of-the-art Swiss production facility on the pristine shores of Lake Constance. By using the highest quality components, a dedicated team of highly skilled and extensively trained specialists, and state-of-the-art manufacturing processes refined for more than 50 years, IQAir is able to build the finest air purifiers in the world. That’s how serious we are about quality.

Multiple Chemical Sensitivity

The MultiGas GC provides real protection that can help you feel better. That's why the GC MultiGas is rated #1 for those with MCS.

A significant number of individuals suffer from Multiple Chemical Sensitivity (MCS), characterized by elevated sensitivities to household chemicals. Symptoms can include eye irritation, wheezing, fatigue, rhinitis, sore throat or cough, skin rashes and other symptoms. The best strategy for treating MCS is to avoid the airborne contaminants and chemicals that trigger the illness and reactions. Because indoor air pollution concentrations are typically much higher than outdoor air pollution levels, “air-filtration devices that remove both particulate and chemical substances from breathable indoor air usually benefit MCS patients considerably,” one leading medical expert concluded.

Reviewers rate IQAir air purifiers as the best systems available for MCS sufferers. Most other air purifiers simply are not effective enough to make a real difference in the quality of the air an MCS sufferer breathes. Equally important, IQAir does not use any technologies that add additional MCS triggers into the air, such as ozone or chemicals. And IQAir products are constructed of computer-grade ABS plastics that do not “off-gas” into the air.

Cigar Aficionado rates GC MultiGas best

Cigar Aficionado experts choose IQAir to clear cigar smoke and odors.

IQAir system selected by Cigar Aficionado: GC MultiGas

"Brothers on Call" choose IQAir for wine cellar

“Brothers on Call” is a DIY Network TV show that features two brothers who run a home-improvement business. When Indoor Air Quality was an issue, they turned to IQAir.

IQAir system selected by Brothers on Call: GC MultiGas

“Brothers on Call” is a DIY Network TV show that features the real-life adventures of Jon and Terry Wittmaack, brothers who run a thriving home-improvement business in Northern New Jersey. For the episode “Tuscan Wine Cellar” the brothers were challenged to transform an unfinished basement into a one-of-a-kind wine cellar featuring a curved, vaulted ceiling resembling a wine barrel. The basement makeover also included a state-of-the-art cooling system, recessed lighting and special brick veneers.

But air quality in the basement was a challenge partly because the homeowner includes an occasional cigar as part of his wine-tasting experience.

To help keep the air clear for the homeowner and his guests, “Brothers on Call” selected the IQAir GC™ MultiGas – rated the #1 air purifier for its superior filtration of smoke and odors. GC MultiGas technology includes 12 pounds of activated bituminous-coal carbon and alumina pellets to clear the air of gases, chemicals, smoke and odors.

“The GC MultiGas is amazing,” says Jon Wittmaack. “We love it because it can handle even cigar smoke, and it keeps the air in the cellar fresh and inviting so our customer can focus on enjoying his wine tastings.”

Keeping her recovery on track with IQAir

Jhyrve Sears was undergoing stem cell therapy and could only come home to a house with medical-grade air. The “Extreme Makeover: Home Edition” team turned to IQAir.

System selected by "Extreme Makeover: Home Edition": GC MultiGas

For many people mold, bacteria, and allergens in their homes can be harmful – for Jhyrve Sears they could be fatal.

Life changed for Jhyrve, 17, when she was diagnosed with Krabbe Disease, a rare genetic disorder that attacks the nervous system. Krabbe Disease is usually fatal, and most patients diagnosed with the disease die within two years. Jhyrve was given an experimental stem cell transplant.

Jhyrve faced a long and lonely recovery. The chemotherapy that was part of her life-saving treatment had disabled her immune system.

"Extreme Makeover: Home Edition" was facing its biggest challenge ever. For Jhyrve to be able to leave the hospital her doctor said she would need a home that was completely free of bacteria, viruses, and allergens. The slightest cold or virus, something a healthy person could easily resist, could be fatal to Jhyrve.

IQAir consulted with "Extreme Makeover" on what would be required to build a proper hospital-sterile environment in a home. IQAir President Frank Hammes flew in from Switzerland for the installation of Jhyrve's CleanZone® HVAC air filtration system. IQAir also placed GC™ MultiGas systems in the home. Jhyrve needed to be protected from chemicals as well as particulates. IQAir's GC MultiGas systems are the world's most powerful and efficient chemical absorption filters.

After the installation of the CleanZone HVAC and GC MultiGas systems was complete came the most critical step in the process. IQAir needed to certify that Jhyrve's house was safe for her return. The IQAir team conducted an Indoor Air Quality inspection of the entire home. The air tests showed that the installation and design of the home were a complete success. The air in Jhyrve's new home was actually cleaner than it had been when she was in the hospital.

IQAir notified the "Extreme Makeover" staff that Jhyrve could now come home.

GC™ MultiGas Tech Specs

Take an in-depth look at the performance facts and figures of the GC™ MultiGas