IQAir MultiGas GC Air Purifier (New Edition)

Advanced Protection from Gaseous Contaminants in Large Spaces

  • The MultiGas GC™ is one of the best air purifiers on the market for the adsorption of chemicals and gases associated with wood smoke, tobacco and marijuana smoke, vehicle exhaust, industrial emissions, smog and VOC off-gassing
  • Features four wide-spectrum gas cartridges containing granular activated carbon and impregnated alumina, capable of filtering out a broad range of organic and inorganic gaseous compounds
  • High-efficiency micro particle pre-filter containing 32 sq. ft. of HEPA H11 class material removes 95% of all particles down to 0.003 microns, including fine ash and combustion particulates
  • Four post-filtration sleeves ensure that any remaining fine dust, abrasion particles and inert carbon dust does not re-enter the air
  • New Edition (NE) model features a re-engineered, three-dimensionally optimized fan that uses state-of-the-art aerodynamics to convert energy into more air with less noise, resulting in higher clean air delivery rates, quieter operation and lower power consumption
  • Unit is triple-sealed using IQAir's® patented 3D UltraSeal technology to completely avoid internal air leakage and ensure that the performance of the MultiGas GC actually meets stated efficiency levels
  • Ideal for large living or family rooms, ensuite bedrooms, basements, offices and apartments/condos, as well as many commercial applications


The IQAir MultiGas GC is a state-of-the-art air purifier that is designed to control a broad spectrum of gaseous chemicals and particulate contaminants. At the heart of the IQAir MultiGas GC is an advanced gas filter cartridge system that delivers unsurpassed gas and chemical filtration, making the MultiGas GC one of the best air purifiers on the market for handling wildfire and wood smoke, tobacco and marijuana smoke, vehicle exhaust, industrial pollutants, smog and VOC off-gassing. While the control of gaseous pollutants is its primary strength, the MultiGas GC air purifier also offers excellent filtration of airborne particles such as combustion and smoke particulates, ultra-fine ash, fibres, dust and dust mite particles, pollen, mould spores and pet dander.

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The IQAir MultiGas GC air purifier features a high-efficiency micro particle pre-filter containing a total surface area of 32 sq. ft. of HEPA H11 class material, mini-pleated with solvent-free separators. This pre-filter is 95% effective at removing allergens and particles down to an incredible 0.003 microns in size (and 99% effective down to 0.3 microns). The HEPA pre-filter is also designed to protect and significantly extend the life of the more expensive gas cartridges by preventing particulates from clogging their pores. The pre-filter is normally good for 6 to 18 months depending on the concentration of particulate contaminants in the room.

In the next filtration stage, the IQAir MultiGas GC air purifier uses four wide-spectrum gas cartridges containing 12 lbs. of granular activated carbon and impregnated alumina to remove a broad range of gaseous organic and inorganic compounds through both adsorption and chemisorption. The carbon blend in the IQAir MultiGas GC is specifically designed to eliminate the following chemicals and gases:

  • VOCs and solvents, e.g., formaldehyde, styrene, trichloroethylene, vinyl chloride, isoprene, methyl ethyl ketone, ethyl acetate, isopropyl alcohol , methanol, acetone and many others
  • Ammonia, amines and ammonium compounds
  • Gases found in industrial emissions, smog, vehicle exhaust and smoke, e.g., hydrogen sulphide, nitric oxide, sulphur dioxide, sulphur trioxide, carbon disulfide, ozone, 1,3 butadiene, acrolein, phenol, cresol, acrylonitrile, formic acid and many others.

The cylindrical shape of the four gas cartridges in the IQAir MultiGas GC allows for optimal contact with contaminants and ensures high removal efficiency, while the large surface area results in increased airflow rates. The gas cartridges in the MultiGas GC air purifier are normally changed every 1 to 3 years depending on the level of gaseous contaminants in the air.

Each gas cartridge in the IQAir MultiGas GC air purifier is fitted with a post-filtration sleeve featuring a total of 5.4 sq. ft. of electrostatically charged media. These sleeves are designed to capture any remaining fine dust, abrasion particles and inert carbon dust escaping from the gas cartridges through the use of a statically charged fibre structure. These post-filter sleeves are usually replaced at the same time as the gas cartridges, i.e., every 1 to 3 years.

With the New Edition version of the MultiGas GC, IQAir has once again raised the bar by developing the most powerful fan ever used in a residential room air purifier. The new fan has been aerodynamically optimized to move more air with less noise. The H11 HEPA pre-filter in the New Edition MultiGas GC has also been improved with an ingenious new pleating design that enhances air flow and expands the surface area of the filter. The result is a 20% increase in the filter's particle loading capacity, which translates into a longer filter life and lower operating costs.

By positioning the fan motor in the centre of the air purifier between the filters rather then after the filter stages, the IQAir MultiGas GC is able to offer superior noise absorption. A unique double-walled housing design and eight vibration-absorbing rubber pads also help to make this unit remarkably quiet, even while operating at peak efficiency.

The IQAir MultiGas GC air purifier features a modular housing design that enables easy replacement of each filter element in a matter of seconds. The two locking arms simply release, and the top diffuser is removed, allowing access to a frame that holds the HEPA pre-filter. The four individual gas cartridges pop out easily and the post-filter sleeves simply slip over them. Because the pre-filter, gas cartridges and post-filter sleeves are all separate, they can be changed at different time intervals, as required.

The IQAir MultiGas GC air purifier is also engineered for superior air gathering and delivery. Air is gathered at dual arches at the base of the unit, while an exclusive 320 degree Evenflow Diffuser™ at the top of the machine provides exceptional air circulation throughout the entire room, with no annoying drafts. This design also virtually eliminates the problem of “shortcutting” (i.e., newly filtered air being immediately re-filtered) that occurs when the air outlet and intake in an air purifier are positioned too closely to one another.

The IQAir MultiGas GC has a full control panel featuring an intelligent filter life monitor that indicates the status of each filter, as well as a programmable timer to adjust air flow rates throughout the day. This air purifier also features six fan speed settings to allow total control over the air flow rate and can be operated from the control panel or via the remote control unit that is included with the unit. The housing of the IQAir MultiGas GC unit is made of non off-gassing, impact resistant, UV-stabilized ABS material for safety and durability. It also has a built-in handle, and is supplied with a set of casters for even greater maneuverability. Available in one colour only, the main housing of this air purifier is light grey with blue locking arms.

Every IQAir MultiGas GC air purifier is individually tested and certified before it leaves the factory in Switzerland and arrives with a Certificate of Performance so that you will know the exact effectiveness of your unit. In addition, the MultiGas GC air purifier is certified ozone-free by the International Association of Air Cleaner Manufacturers (IAACM).

The IQAir MultiGas GC is perfect for open concept rooms, large bedrooms, kitchens, basements, apartments and offices, as well as for many commercial applications. The MultiGas GC has a timeless design and neutral colour scheme that blends easily into almost any home or office décor.

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Looking for replacement filters for this unit?   See IQAir MultiGas GC filters
Not what you’re looking for?   See other IQAir air purifiers
Want to compare IQAir air purifiers?   See IQAir air purifier comparison chart

Pre-Filter HEPA H11 class pre-filter, removes 95% of all airborne particles down to 0.003 microns in size (and 99% at .3 microns)
Surface Area of HEPA Media 32 sq. ft.
Types of Carbon Media Granular activated carbon and impregnated alumina
Carbon Weight 12 lbs.
Surface Area of Carbon Media 1500 acres
Post-Filtration 4 post-filter sleeves containing electrostatically charged microfibers
Surface Area of Post-Filter Sleeves 5.4 sq. ft.
Average Filter Life Pre-Filter: 6-18 months
Carbon Filters: 1-3 years
Post-Filter Sleeves: 1-3 years
Estimated Filter Replacement Costs Pre-Filter: $119
Carbon Filters: $439
Post-Filter Sleeves: $139
UV Lamp Not available
Average UV Lamp Life N/A
UV Bulb Replacement Cost N/A
Room Coverage**
(on High Speed Setting)
1130 sq. ft. (2 air exchanges/hr)
565 sq. ft. (4 air exchanges/hr)
380 sq. ft. (6 air exchanges/hr)
285 sq. ft. (8 air exchanges/hr)
Air Flow Rates** 300 cubic ft. per min. at Speed 6 (highest setting)
200 cubic ft. per min. at Speed 5
170 cubic ft. per min. at Speed 4
130 cubic ft. per min. at Speed 3
75 cubic ft. per min. at Speed 2
40 cubic ft. per min. at Speed 1 (lowest setting)
Air Intake Dual arches at base of unit
Air Output 320 degree Evenflow™ diffusion
Ozone Emission None
Decibel Level 25 dB (low) to 59 dB (high)
Voltage 120/60Hz
Power Consumption 27 watts (low) – 215 watts (high)
Cord Length 10 feet
Safety Approvals CSA/UL approved
Fan Motor 780 cubic ft. per min., 2750 revolutions per min., maintenance-free, with thermal protector, non-stop use approved. Improved centrifugal, backward curved fan.
Speed 6 control settings
Housing Construction Non off-gassing, impact resistant, UV-stabilized ABS plastic
Filter Access All filters are easily accessed by releasing locking arms and removing the top diffuser. No tools required.
Maneuverability Handle on top of unit allows for easy carrying. Also supplied with a set of casters for added convenience.
Dimensions 28” (height) x 15” (width) x 16” (depth)
Operating Weight 41 lbs.
Shipping Weight Approx. 52 lbs., shipped in 2 boxes
Remote Control Yes
Filter Life Monitor Yes
Programmable Timer Yes
Optional Accessories PF40 Coarse Dust Pre-Filtration Kit ($199)
Warranty 10 years for residential use (or 2 years for commercial use) if unit is registered with IQAir within 30 days of purchase, 1 year otherwise
Place Manufactured Switzerland
Colour Light grey body with blue locking arms


“The IQAir MultiGas GC air purifier that I purchased from you is up and running, and doing a great job in the smoke of BC’s wildfires. It is wonderful with asthma to be totally comfortable inside, whilst smoke obscures the view outside. On high speed the IQAir is pretty noisy, but worth it for the improvement in quality of life it provides”
Kay C., New Denver, BC

“Just like to say how improved the air quality became after purchasing the IQAir MultiGas GC. Had it for a year now, and it has greatly resolved the problem of a 1000 sq. ft bungalow, built in the 50’s, on a cement slab, without a vapour barrier above or below. The cool moist air in the cement below would always seek the warmer dry air above, causing various degrees of musty odors and allergic reactions. With some appropriate drainage and landscaping this past summer, along with the IQAir GC, problem solved… Thanx Robert”
Doug W., Deseronto, ON

“We had some staining done while we were away and when we returned, the fellow who did the staining – an individual with 30+ years of experience – wanted to know about our IQAir MultiGas GC. He was shocked from one day to the next how much the smell had diminished.”
T. Daw, Peterborough, ON

“I can’t believe how effective the IQAir MultiGas GC air purifier that I bought from you is. Even my kids, who were skeptical to say the least, are impressed!! No more new house smells, no paint, stain or cabinetry smells. Just fantastic!”
D. Giampietri, North York, ON

“My IQAir MultiGas GC air purifier is making my life dreamy. Quite literally. I take the IQAir into my bedroom when I go to sleep and keep my bedroom door shut. No more stuffy nose in the morning or itchy watery eyes. I've been dreaming in my sleep all week, and sleeping so much better. Amazing air purifier!”
S. Billard, Ottawa, ON

“I've had the IQAir MultiGas GC you sold me for well over a year now, and I thought you'd like to know that my young nephew, who is allergic to almost anything that blooms in the summer, is symptom-free when in the same room as the IQAir MultiGas GC. For that matter, so am I.”
David, Navan, ON

“The IQAir MultiGas GC air purifier is doing a very fine job at purifying the air in my apartment. I am very satisfied up to now, as I had some tobacco smoke entering into my apartment. I do have Austin Air air purifiers running as well, but the added IQAir GC MultiGas finished the job for me to have clean air (I am very sensitive and allergic to tobacco smoke). Smoking tobacco should not be allowed in residential buildings, as it easily travels from one apartment to the other.”
Robert G, Montreal, QC

“The IQAir MultiGas Air Purifier that I bought from you in late January/22 has allowed me to 're-claim' the air in my house.' Just before Xmas, I had a carpenter build and install a large floor-to-ceiling bookcase in my house. To adhere the bookcase, he used a glue that evidently didn't agree with me to put it mildly. No matter what I tried (other, cheaper air purifiers, opening windows, reed diffusers, nasal rinses) or where I went in my house, I couldn't shake the smell of the glue from my olfactory system. My quality of life was compromised significantly particularly, too, because at that time - in early January 2022 - the Province mandated a lockdown as a result of the spread of omicron. Hence, I didn't really have an outlet at my disposal where I could spend a few hours each day outside my house. I was desperate. Should I vacate my house (I live alone) and rent somewhere else for a few weeks? The problem wasn't relenting so I then did some research into acquiring a more effective air purifier and discovered multiple rare reviews (from reputable third party testers) for a brand called IQAir. Ultimately, I contacted Robert at Modern Alchemy and he spoke about IQAir's MultiGas GC Air Purifier having the unique capability of removing volatile organic compounds (VOCs) from the air. Before calling him, I had learned that there is a small percentage of people who have a condition called, 'multiple chemical sensitivity' (MCS) and that based on my adverse reaction to the glue, I, too, suffered from MCS. A couple of weeks after my discussion with Robert, I bought and took delivery of the 'IQAir MultiGas Air Purifier.' And how has it performed? Ecstatically, I can say it's been magnificent. I have my life and my house back. Thank you to the Swiss manufacturers of IQAir and to Robert! Oh, I should say too, that unlike some service/product suppliers I've dealt with, Robert didn't do a review solicitation. I shouldn't be surprised because like the product he sold to me, Robert is a breath of 'fresh air.’”
Richard K, Niagara-on-the-Lake, ON

See all IQAir Reviews

** An Important Word on Air Flow Rates and Room Coverage for the IQAir HealthPro Plus Air Purifier:

Many retailers and manufacturers overstate maximum room coverage figures by calculating them with air flow rates measured without filters installed (i.e., fan output) or with too low a number of air exchanges per hour to properly clean the room. Modern Alchemy Air Purifiers believes in stating the actual delivered air flow rates for the air purifiers we sell, as well as realistic room coverage figures calculated at effective air cleaning levels. Accordingly, we recommend that the IQAir MultiGas GC be used in rooms of up to 285 sq. ft. (for premium gas filtration) or 565 sq. ft. (for general purpose filtration).

Also note that air purifier performance should not be judged by air flow rates and room maximums alone. Many features that make an air purifier more effective at cleaning the air actually reduce the air flow rate. For example, higher grade HEPA filters, well-sealed filtration systems and large amounts of carbon all increase air resistance and reduce delivered air flow rates.
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Modern Alchemy Air Purifiers is 100% Canadian-owned, operating out of Ottawa, Canada. We proudly serve Vancouver, Calgary, Edmonton, Regina, Winnipeg, Toronto, Montreal, Halifax, St. John’s and all points in between. We also ship our IQAir air purifiers anywhere within the contiguous United States.

To order by phone, or for more information, call: 613-894-0331
Toll Free: 1-877-467-7873

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