IQAir GC MultiGas Air Purifier Review In 2022

Voted the best air purifier to clear away cigar smoke and odor (by Cigar Aficionado), IQAir GC MultiGas is widely known on  its exception chemical filtration along with strong airflow delivery rate. A comparable model to the standard HealthPro series, in accordance to the air flow delivery rate, filtration, applicable area and noise level, will the extra cost on delivers more value than the classic HealthPro? Will the focus on chemical particles means some compromisation has to be made on irritants and microbes filtration? See our detailed review below.
online price (US)**
±1,299.00 $$$$$$$/ 7

(annual filter cost ±196-390)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

IQAir GC MultiGas Specification

ProductIQAir GC MultiGas
15 x 28 x 16 in
(38.1 x 71.1 x 40.6 cm)
Weight44 lb (20 kg)
Coverage (up to)1125 sq. ft. (105 m2)
Airflow speed40 - 510 cfm (68 - 866 m3/h)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
HyperHEPA Pre-Filter H11
1 year
+- 78
HEPA filter
- Lifespan
- Replacement cost ($)
Carbon filter
- Lifespan
- Replacement cost ($)
GC MultiGas Cartridges (12 lbs granular activated carbon & impregnated alumina)
2.5 years
+- 295
Ionizer/ Technologies
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
PF40 Kit
+- 139
Post-filter Sleeves (5 pads)
+- 55
Noise level25 - 69 dB(A)
Power usage level27 - 215 W
Timer/ SchedulerTime x Week x Speed
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty10 years
Email/ Phone support

Key Features

  • 4-stage filtration with 6 fanspeed and 320 degree airflow
  • HyperHEPA Pre-Filter H11
  • Post-filter Sleeves
  • GC MultiGas Cartridges
  • 3D UltraSeal triple-seal design
  • 4 language digital display with advanced scheduling
  • Remote control
  • Certified on build quality and performance
  • 10 years warranty

Design And Usability

IQAir GC MultiGas dimension
15 x 28 x 16 in
(38.1 x 71.1 x 40.6 cm)
IQAir GC MultiGas weight
44 lb (20 kg)

With numerous awards and used in many TV series like Brother on Calls, is no surprise that IQAir GC MultiGas is rated number 1 air purifier for MCS, odors & smoke. Sharing the same timeless design as HealthPro Plus, the exterior has a slightly different color scheme than you could easily tell apart. At [adimension] dimension and [aweight] weight, it has the same size as HealthPro Plus and its a lot heavier due to the added filters. On to build quality, you will find plenty of rigid ABS plastic in this Swiss made air purifier. Fitted with 3D UltraSeal triple-seal technology, build quality is extremely solid with no off-gassing/ leakage but downside is the mobility which is not easy to say the least. Surrounding the air purifier you will find a 320 degree airflow output and top carrying handle. Control wise you have a standard IQAir digital screen that allows you to set the 6 speed, Intelligent Filter Life Monitor, advanced scheduling (programmable timer) where you can pre-set start time/ end time and speed setting from Monday to Sunday. Inside you will find a 4-stage filtration with the main filters: HyperHEPA Pre-Filter H11 and GC MultiGas Cartridges. Other similar features you will find in all IQAir air purifier including certified airflow performance, IAACM (International Association of Air Cleaner Manufacturers) listed, no-ozone 100% Healthy technology and 10 years warranty.

Airflow, Coverage, And CADR

IQAir GC MultiGas coverage
Purifying coverage
1125 sq. ft. (105 m2)
IQAir GC MultiGas fanspeed
With certified performance from IQAir, each unit is meticulously checked by quality control engineer on particle filtration efficiency, leakage and airflow performance. The strong airflow will pull all airborne irritants including dust from the bottom of the panel and release out clean air through the top panel. Controlling the abundant airflow is a 6 fan speed that allows precise adjustment. Sadly there is no Auto mode or sleep mode feature but you can achieve similar result via the advanced scheduler. All in all expect an impressive purifying coverage that cater for any room size, living room or lounge.

Filters And Performance

Slightly different from HealthPro setup, the 4-stage filtration is more oriented to chemicals filtration although that does not mean it will fall short in handling allergens and other microscopic particles. Let's start with the pre-filter, instead of a standalone pre-filter, opt for the combination HyperHEPA Pre-Filter which save-space yet still very effective against allergens, smoke, bacteria and viruses as small as nano size. For stronger chemicals that is notoriously hard to capture, you have the Post-filter Sleeves that will eradicate activated carbon and chemisorption abrasion particles via its charged fiber structure. This is follow by GC MultiGas Cartridges that eliminate chemicals like formaldehyde through an oxidation process in its chemically active alumina pellet. As a final bonus point, IQAir GC MultiGas can actually reduce ozone level in your room rather then contributing more like an ozone generator.

Noise And Energy Usage

IQAir GC MultiGas noise level
Noise level
25 - 69 dB(A)
IQAir GC MultiGas power consumption
Power consumption
27 - 215 W
Like HealthPro, IQAir GC MultiGas is filled with noise insulation galore from the curved fan design, sound deflector diffuser, thick double-walled housing and rubber suspension pad that reduces the motor vibration noise. As a result, this latest edition delivers 7% less noise than previous version at a mere 25 - 69 dB(A) noise. 27 - 215 W power consumption is acceptable despite the lack of Auto mode. The first 3 speed is in the lower tier consumption rate while the following 3 speed is of course in the higher tier group. For more optimize energy use, we recommend setting up the advanced scheduling timer to activate/ deactivate the air purifier when is needed.
Noise TypeDecibels
IQAir GC MultiGas25 - 69 dB(A)
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

+- 1,299.00
IQAir GC MultiGas annual filter replacement cost
Annual Filter Cost
+- 196 - 390
^ Replacement filters/ estimated cost
Undisputed build quality? Checked. Exceptional airflow performance? Checked. Outrageously expensive price? Checked. All above pretty much sums up IQAir GC MultiGas as an air purifier. However like IQAir HealthPro Plus, the unrivaled filtration rate prove to be the ultimate air purifier for long haul as filter replacement set is one of the most cost efficient in its category. Despite the expensive price for both HyperHEPA Pre-Filter H11 and GC MultiGas Cartridges, the filters has an amazing lifespan where you divide the day-to-day running cost is actually less than 1 dollar. Amazing stuff.

IQAir GC MultiGas VS The Challengers

IQAir HealthPro Plus Air Purifier Review

IQAir HealthPro Plus

The classic model from IQAir that does not fall short on performance and filtration.
Blueair Pro XL Air Purifier Review

Blueair Pro XL

Another premium selection that has the best CADR return and purifying coverage.

Final Thoughts On IQAir GC MultiGas

In short, IQAir GC MultiGas is a niche market air purifier that provides incredible chemical filtration and purifying radius. By comparison with the pros vs cons, the pros you will get from the air purifier is more critical than the shortfalls. Included the 2 options above, we recommend the air purifier to all that needs the very best against the most harmful indoor chemicals.


  • Exceptional build quality from Swiss thanks to the impact resistant ABS plastic .
  • Guarantee no leakage with its zero-leak triple-seal technology.
  • PreMax pre-filter that is capable of capturing both large and micro-particles such as pollen, spores, mold.
  • Effective V5-Cell MG Granular activated Carbon filter that absorb and eradicate all types smoke and odor.
  • HyperHEPA is the best True HEPA filter we reviewed that is capable of trapping ultra-particles down to 0.003 microns.
  • Long 2.5 years filter lifespan for GC MultiGas Cartridges
  • Each air purifier are individually tested and certified on its performance.
  • Lower than average noise level for a high-performance air purifier.
  • Comprehensive purifying coverage with 320 degree airflow distribution framework.
  • Remote control ready with up to 6 selectable fanspeed.
  • Advanced scheduling (programmable timer) - set fanspeed x time, day or week.
  • Industrial leading 10 years warranty.


  • The most expensive air purifier in IQAir lineup.
  • No dust/ odor sensors thus no Auto mode and air quality display.
  • Heavier than HealthPro Plus despite sharing the small body size.
IQAir GC MultiGas

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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