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IQAir GC MultiGas Purifier


For control of a wide range of gaseous organic and inorganic chemicals.
The GC MultiGas system offers powerful, full-spectrum protection for the work environment, with the highest quality carbon, alumina pellets with potassium permanganate and HyperHEPA filtration of particles of all sizes.

  • H11 HyperHEPA pre-filter
  • MultiGas Filter Cartridges eliminates VOCs
  • Variable speeds up to 300 CFM
  • 10 year limited warranty
  • 1CC UB0 HGB

#1 Rated purifier for multiple chemical sensitivities, odors & smoke

The GC MultiGas is the ideal air purifier for those with multiple chemical sensitivity (MCS). Its
four gas filter cartridges put the highest-quality granulated carbon and alumina pellets impregnated
with potassium permanganate to work for you against gases, odors, chemicals and even smoke.
And the GC MultiGas HyperHEPA® filtration technology delivers a minimum Total System Efficiency
of 99% for particles 0.3 microns and larger and 95% for ultrafine particles down to 0.003 microns.

Family with HEPA - Gas - Odor Purifier


One system gives you the best of both worlds.

Some air purifiers claim to be effective against gases. Others claim to be effective against particles.
But the IQAir GC MultiGas integrates the best of both technologies together into a single system
that provides superior filtration of gases and particles. The GC MultiGas features the most advanced
gas controlling system ever designed. Combined with powerful particle filtration, this system can help
you live a normal, healthy life again. Isn’t it time you took control over your chemical sensitivities?

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. 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.

Gas mask air purifier.

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.

Designed to deliver the purest air possible

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.

Components of a HEPA Gas Chemical purifier.

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.

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.

HEPA purifier with warranty


Proven effective against ultrafine particles

IQAir is different. Our HyperHEPA filtration is effective against particles 100x smaller than ordinary air filters.

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.

Ultrafine particles removed by HEPA purifier.

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 CG MultiGas is proven and certified to filter at least 99.5% of all particles down to 0.003 microns – the smallest particles that exist. This is 100 times smaller than what is achieved with ordinary air filtration technology and 10 times smaller than a virus. Independent testing by laboratories and government agencies verifies the effectiveness of IQAir technology against ultrafine particles.  When it comes to protection against ultrafine particulates, IQAir is the proven choice.

How does the IQAir GC Multigas compare to the Compact or Health ProPlus?

HEPA purifier comparison chart

New Upgraded Fan

New Edition technology produces 32% less sound across all fan speeds, without sacrificing filter life or system efficiency.  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.

HEPA purifier fan

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.

High Efficiency Design

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.

Technical Specs

  • GC HEPA Pre-Filter H11 (S)
  • Purpose: control of coarse, fine & ultra-fine dust particles; protection of subsequent filters
  • Media: non-woven glass microfiber HEPA filter, non off-gassing separators
  • Efficiency: 99% at 0.3 microns (EN 1822 class H11)
  • Surface area: 32 sq. ft.
  • Average filter life: approx. 12 months (based on average daily usage of 10h on speed 3)
Gas / Odor filter
  • GC Filter Cartridge Set
  • Purpose: control of a wide range or specific chemical substances and odors

Media options:

  • GC MultiGas: 12 lbs. granular activated carbon & impregnated alumina
  • GC VOC: 9 lbs. granular activated carbon
  • GC ChemiSorber: 17 lbs. granular impregnated alumina
  • GC AM: 12 lbs.  granular impregnated activated carbon
Post Filter
  • GC Post-Filter Sleeve Set
  • Purpose:  control of fine & ultra-fine particulate matter
  • Media type:  electrostatically charged fiber
  • Surface area:  5.4 sq.ft
  • Avg filter life:  approx. 2.5 years (based on average daily usage of 10h on speed 3)
Weight 48 lbs
Dimensions 15 × 15 × 28 in