GC Series NE

This is part of the reason why I often suggest to people to find second hand medical air purifiers like the ones from iq air. Not only do they have filters capable of UFP removal, but they have multiple pounds of carbon to remove VOC’s as well. The GC series even has specialty cartridges for targeting specific nasties above and beyond. Though they’re less common to get for a good deal. If you print a ton of VOC happy materials and resins, they have even more media to tackle that though. The overwhelming majority of air purifiers on the market lack in both areas. This does mean that the filters are somewhat expensive. But it makes your house smell sterile lmao.

I said second hand medical grade. It doesn’t need to be a second hand from a hospital per se. The difference is that machines like this are built to catch your super bugs that are living in and on UFP and general dust They’re purchased all the time to be used at home. It’s no different than buying a normal air purifier. Toss the filters, get some new ones, be done with it. Or I guess if you’re THAT paranoid, just go and buy it full price brand new.

AirDoctor doesn't have much activated carbon in their filters... definitely not thick. You're right about IQAir, specifically the GC series purifiers. AllerAir and Airpura purifiers tend to have heavier carbon/sorbent media canisters for the money.

Most common air purifier brands do not have enough nor the right type of sorbent media for gases, vapors, or odors. Sorbent media in air purification = activated carbon, activated alumina, or synthetic zeolites. Heavyweight sorbent media purifiers are very expensive, very loud, and clean the air more slowly than particulates-focused units. This is due to the need for ["dwell time"/"residence time"](https://www.airscience.com/carbon-filters) and the thick media beds. The two major heavyweight brands in the USA & Canada are **Airpura** or **AllerAir**. You want to look for models with 15 lbs.+ carbon canisters. Most standard options for these purifiers are plain/chemically untreated sorbents, which do *not* have high removal capacities for all gaseous "species". This sometimes presents problems where an odor emanates from the sorbent bed (possibly the not-well-adsorbed acetaldehyde) or there's a spike on tVOC monitors despite a reduction in odors. Assuming you don't live near a refinery or have really bad air chemistry otherwise (e.g., from fires), you may want to look into potassium permanganate (KMnO₄) impregnated activated carbon from Airpura or AllerAir. You'd have to contact the respective company first to specify this. KMnO₄ works in part via redox (reduction oxidation) reactions by breaking down certain gases. This can be problematic in unknown and/or highly complex air chemistries where resulting gases may be problematic. It can also off gas as it saturates or loses efficacy.

Your best options are likely the IQAir GC or GCX series purifiers. As for the exact model, you may want to choose one with potassium permanganate (KMnO₄) impregnated carbon or alumina. See [my other comment in this thread](https://www.reddit.com/r/AirPurifiers/comments/1oco7i5/comment/nkoz4yw/).

Hey, you and I are in the same boat. I had a baby boy at 31 weeks, now almost 5 month adjusted, and I went down the air quality rabbit hole hard. I want to do whatever I can to keep him healthy and developing normally. He sleeps with us in our room right now. I have a clean air kits luggable xl pc fan cr box and a IQair Health Pro Plus running on setting 2. Both run 24/7. This gives me a lot of air changes per hour and some gas filtration, while staying below 50 decibels. In the rest of the house, I have more luggable xls, smart air blast, iqair gc and GCX, Coway 400 and 300, and an Alen 25i. I think it’s important to get a standalone air quality monitor like the air gradient one or purple air zen. I run the hvac blower fan 24/7 to circulate air through the house. I also open windows every morning and bring in fresh air to keep CO2 low. I don’t know what your budget is, but you can make your own cr boxes for really cheap and then throw a few nice hepa air purifiers on top. I bought all the expensive units used (iqair, Coway, smart air) and saved a ton of money. Just gave them a good cleaning and new filters. Another important thing is to always run your kitchen hood vent when cooking I’ve been keeping my house between 68-72 degrees Fahrenheit so that he sleeps his best and relative humidity between 45-55%. I have a Midea Cube dehumidifier I run when it’s really humid out and humidity in the house gets above 60%. I also vaccum and mop the floors all the time now. We have an old dog that sheds a lot and the floors get covered in hair if I don’t stay on top of it. I kindof rambled but that’s just been what I have been doing and what purifiers I bought to give you some ideas and things to look into.

I just got an Alen Air 25i for my little office and it’s been a really great unit for the last few weeks. Alen sells bundle “whole house” solutions that might work for you. For me, I put a smart air blast in my living room, a iqair GCX in my kitchen, iqair gc in my dining room/front foyer, Alen 25i in the office, Coway Air Mega 300 and 400s in our spare bedrooms, an iq air health pro plus in the master bedroom, and 4 clean air luggable cr boxes spread out throughout the house. Do I have an addiction to buying air purifiers? Yes. Very weird addiction. But all were bought off Facebook marketplace and were pennies on the dollar compared to new. Just had to give them a good wipe down and put in a new filter.

Iqair is a great option. Have one in our bedroom with our 5 month old baby. But can only run it on setting 2 (75 cfm) without going above 50 db. We also have a luggable xl cr box in the bedroom to get more filtration without increasing the sound in the room. We have a Smart Air Blast in the living room and it’s a a quiet beast. Pushes a ton of air, however it’s power hungry. I’m also a fan of the Alens for how they sound and Coway AirMegas.

I can clearly tell when my IQAIRs are running, I sleep so much better. You might already have good air quality Fixing your furnace filter and central filtration will make a bigger difference than buying an air purifier

I run 3 filters, Austin and IQAIR, in each of 2 spaces - one 300 square feet the other 600 square feet. If the air is poor outside my Purple Air sensors will still show green. However there are so many chemicals in wildfire smoke, particularly if structures have burned, that they don't get everything. I am sensitive to terpenes and right now they don't help with the Camphor tree flowers. So they can greatly improve air quality but don't expect all VOCs to be removed from the air.

For best VOC removal, such as mycotoxins, you need a lot of absorbent media. Checkout Airpura, Allerair, Austin, IQAir. All are in the $1k range. I'm unsure whether any filter will eliminate mold sensitivities. Did see an improvement when upgraded my Austins with Immunity Machine filters but molds still aren't totally controlled. There are clinics which can treat mycotoxin sensitivities. Can be quite expensive.

Running both IQAir and Austin Immunity Machines in my major rooms particulates run from 0 to under 10.

I have had my Austin, IQAir, Honeywell and Whirlpool machines for as much as \~20 years and have had no problems with filter replacements.

The 4 vendors with the best VOC filters are Airpura, Allerair, Austin, IQAir. Absorbent media composition and weight vary by manufacturer. IQAir has models that go up to 32 pounds of media, at least according to google search. Note that no VOC filter will remove all VOCs. They do well with some chemicals, partially control some, and totally ignore others. I use IQAirs and Austin Immunity Machines, multiple units per room unless you want to put up with the noise running the fans on high speed. Had a room repainted and requested a low VOC paint. Was pleasantly surprised that I had no problems with the paint even though I am extremely chemically sensitive. It is possible that the renovations don't cause a VOC problem at all, or maybe just for a few days.

My Austin, IQAir, Honeywell and Whirlpool filters all work with smart plugs. When you purchase make sure you can return if it doesn't work as features change over time.

Alen is excellent. So is IQair

Iqair if you can afford it… I’m sure there are even better in an industrial setting but for home iqair is goat.

I use mine mostly during wildfire season. Works better than any other units I tried in the past. Got mine directly from IQAir.

Thank you! I purchased a Austin Air and IQair purifier + Miele C3 vacuum cleaner + Mold cleaner for a full revamp. This may be the root cause of my illness which is terribly affecting my quality of life, going all out! Thanks again!

IQAir and Austin Air are the go-to “buy it for life” purifiers. They really have long-lasting filters and proven performance on my end