IQAir - GC MultiGas

Second this brand – it's best of the best imo! I've got the IQ GC MultiGas, and the difference it makes to the air quality is insane. I had some noticeable chemically smells in the house and the carbon filter sucked it right out.

I invested in an [IQ air](https://www.iqair.com/us/products/air-purifiers/gc-multigas). It’s pricey and a beast of a machine but I live next to the freeway so it feels necessary.

IQair GC Multigas

Aside from the marketing specs, all I really have is my subjective opinion. I leave it in the living room on a low setting 24/7 and the air is noticeably cleaner than outdoor air or when I don’t have it on. The most noticeable effect is with smells, as the charcoal cartridges suck them right out of the air. I don’t have any allergies or sensitivities so I can’t comment on the effectiveness there. I suppose the two most extreme air-quality environments I’ve lived in were an area that got lots of wildfire smoke and an apartment in an Asian metro area. Regardless of how bad the smog or smoke was outside, the air in my home was always the same clean, neutral-smelling air since I leave it on all the time.

I would not order Airpura, as they are based in Canada, filter changes are a nightmare, and our unit broke in the first year. For whole-home, I would stick with a company with decades of experience in HVAC: Lennox. https://www.lennox.com/residential/products/indoor-air-quality/air-purification/hepa Filter Life * Carbon pre-filter: 12 months * HEPA filter: 2 to 5 Years * Inner carbon filter: 3 months * Optional coconut shell carbon canister: 1 Year Optional carbon filtration: * 3lb carbon HEPA-20 * 6lb carbon HEPA-40 and HEPA-60 * **30lb carbon HEPA-40 and HEPA-60** For movable units that do what you want, filters are going be very expensive. For the portable units, it’s hard to beat IQAir GC MultiGas: https://www.iqair.com/us/products/air-purifiers/gc-multigas Ships with: Filter/Step 1 (F1): H11 pre-filter ($95): https://www.iqair.com/us/products/replacement-filters/hyperhepa-pre-filter-h11-f1 Filter/Step 2 (F2): GC MultiGas Cartridges ($332): https://www.iqair.com/us/products/replacement-filters/gc-multigas-cartridges-f2 * Standard gas cartridges with 12 pound of charcoal Filter/Step 3 (F3): Post-filter sleeves ($95): https://www.iqair.com/us/products/replacement-filters/post-filter-sleeves-f3 The filter/step 2 (F2) cartridges can be “upgraded” to either of these: GC VOC Cartridges ($300): https://www.iqair.com/us/products/replacement-filters/gc-voc-cartridges-f2 * 17 pounds of granules GC ChemiSorber Cartridges ($400): https://www.iqair.com/us/products/replacement-filters/gc-chemisorber-cartridges-f2 * 32 pounds of granules

I’ve never experienced any off-gassing or smells from our IQ Air. However, if I did smell anything, I wouldn’t worry as the granules they use are all safe. But comparing the IQAir GC MultiGas and the AirPura F700DLX-W isn’t really a fair comparison. While I don’t own the latter, it has twice the CADR on high. The IQ Air on high is unbearably loud. The AirPura is meant to be installed in a mechanical room where you can’t hear it. The IQ Air will only help in a room, the AirPura will help with any room that has an HVAC duct. I believe in a layered approach, and also in buying based on CADR per dollar whenever possible, even for VOC filters. If you are deciding on your first purchase, I think the AirPura is the way to go. The IQ Air GC MultiGas makes more sense as an add-on for a bedroom, home office, or small living room - not as a first/primary purchase.

IQAir: I own two IQAir HealthPro Plus and one IQ GC MultiGas. Austin Air: None, but I have the very similar AirPura P714+ ULPA + UV + Carbon I have no empirical way to compare them. But I like them all except the AirPura. Unfortunately nobody is publishing VOC test results.

CG Multigas by IQ Air. No regrets!

Absolutely. I have an IQAir GC Multigas

IQ Air GC (does vocs, there is a base model for less though)

I bought directly from Green Building Supply in Iowa (amazing customer service & super fast!) but don’t see it there now, so I’ve linked to the models at the manufacturer. One of these is the XE https://www.iqair.com/us/products/air-purifiers/gc-multigas https://www.iqair.com/products/air-purifiers/gc-multigas ETA: I have MCS. We keep one in the bedroom, office and main living space. We’ll get the house unit when we move.

I use IQAir GC MultiGas and it works great. You probably need multiple of those. One for each room and living space. If you want something that doesn’t take space, you can consider integrating IQAir PerfectPro as part of your HVAC ducting. Mind you, the filters are astronomically expensive, and you will need to replace them way more frequently than what’s suggested.

Have worked through all sorts of filters over the years. Quick answers (just did a longer post to another similar question): A - Dyson, no way B - nothing with an ionizer or anything that tries to sell you on electronic or charged particles. C - the ½ or ¼ inch charcoal filters in most purifiers are worthless. If VOCs are the issue, just open some windows. If you can’t, then check out IQair Multigas, and the Austin Air unit with about 30 pounds of charcoal. D - you have to choose between HEPA (most of those on your list), or medical grade like the IQAir. The later cleans MUCH MUCH more, but they cost 3-4x as much (although their replacement filters last a long time.) Good luck and success!

You’ll love these machines I think - they are amazing. We have both. We use the multigas to reduce VOCs… but honestly it’s hard to tell if it is working. Unless you have known issues with newer products, rugs, floors, etc., that are off-gassing, I’d go with the Health Pro. It is a great machine. We run it quietly in the daytime and crank it up at night. You can also get cheap pre-pre filters that go on the very bottom to extend the life of the main filters.

That IQAIR model is a good one for a mixture of particulate and VOC filtration. You can also look at other companies like Austin Air, Aller Air, or essentially any other "steel can" style air purifiers. They'll come with tens of pounds of activated carbon and HEPA filtration but they are loud and expensive. But they are effective.

Pro X does have activated carbon but not a lot. Just a few lbs and they're connected to the HEPA filters meaning if you want to run it under ideal circumstances you'll have to replace the filters when the carbon is full which happens way faster than the HEPA portion. That's one of the nice thing about the IQAIR unit is that it has separate filters. However the PM2.5 particulate is the most immediate danger from the smoke and the Pro X will absolutely breeze through filtering that. It'll probably do ten or more air changes per hour in a room that small.

I’m located in Los Angeles and am looking for the “best” air purifier to eliminate risks from the wildfire smoke. I’d like to spend no more than $1600 if possible. The room we’d like to cover is our nursery where our 4-week old has been staying. The room is small, probably 150 square feet with an 8 or 9 foot ceiling. I was going to purchase the IQAir GC Gas, as recommended by the Buying Guide, but it looks like it’s sold out or no longer available. Is there anything better than that? I suppose I can get the IQAir GC Gas version with smart capabilities but the extra cost seems to not be worth it based on prior posts. But if that’s the best for the price then I can do that Thanks in advance for your help!!

Thanks so much for your help! I went with the IQAir because it’s 1-day free delivery and I was able to use FSA dollars.

I ordered the IQAir MultiGas, it’s been running all day, still have a crazy headache and sore throat. Feel like death. How are we going to live like this??

Ah crud, bought another MutliGas too. Both have been running all day, one in the living room, one in the bedroom. Headache and sore throat gone at home, but comes on when I’m outside for 10 mins.

IQAir makes some of the best in the industry - each unit is tested and certified, made in Switzerland. The units are quite large though. I have one per floor and s multigas unit in my garage where my workshop and home gym are

… I already did. The Aerus is a VERY expensive photo catalytic oxidizer. It shines a weird light on a special surface and basically chemically bleaches the air. Safe? Yes. Effective? Sure. Cheap? Hahahahahaha no. They’re like $2000 or more. Is it good for VOC reduction? No. Is it a good HEPA filter? Meh. IQ Air has a hyperhepa filter and a carbon adsorption filter. Only about 5lbs of carbon in the HealthPro plus but it has two HEPA filters. A pre filter that’s H11/H12 and a main filter that’s H13+ and quite beefy. The carbon is in the middle. The MultiGas skips the first HEPA but isn’t a bad filter at all except for mediocre CADR.

This goes against all advice you may otherwise receive in this sub/youtube videos, but I really find the Dyson BP03/BP04 therapeutic as I recover from mold illness. I had a lot of mold in my home and accompanying lung pain and these dysons are the only thing that give me relief. For context, I also bought the IQ qir healthpro plus and IQ air multigas, and these units were not great at helping my symptoms. I think the main difference is that the dyson actually projects the air and cleans the room whereas many other purifiers might have superior filtering technology but they don't actually get the clean air into the room away from the unit.

I bought the GC a couple weeks ago and though expensive, it works fantastically well for eliminating stale smoke odor from my apartment (not a smoker, it was here when I moved in). It’s everything it’s advertised as if you can afford it.

I use an IqAir GC, Coway Airmega 400s, and Coway Ap1513. I have invested in these over the years and bought them from wholesale or second hand. They are all heavy-duty purifiers, but anything with a hepa filter will do. Make sure if you are on multiple floors... air purifier on each floor. Make sure it's double the sq.ft of the area you want to filter. If it's not enough.. double up.

+1 - have noticed significant improvement with the IQAir GC model. Highly recommend.

Iq Air GC series 12 pounds of activated charcoal $1350 Amazon.

Huh? He’s asking about air purifiers for smoke, VOCs, toxins of any sort. The air purifier I mentioned is hands the best on the market. The one I specifically mentioned is used in ER and surgical areas. It’s expensive but it’s the best tool on the market to get the job done. Life changing for me.

I have: 1x IqAir with all the add ins and pre filter 1x Austin it 1x Levoit 600S 2x Levoit 300 1x 24x12x2 MERV 12 Filter (corsi style) but with an HVAC box and INLINE fan. All my HVAC return filters use MPR300 filters. I vacuum all the time, and run a robot vacuum multiple times a day. The goal is keeping the dust on the floor from floating UP and ON to elevated surfaces. In return the air filters last longer.

These are the 3 air filters I personally have. Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc.  AirDoctor IQAir AirOasis I also have a Levoit that I like but doesn't capture as small of stuff as the ones above.