Oransi - TrueCarbon™ 150C Air Purifier

You want to remove the bad odors. Try something with activated carbon. I have a couple air filters from Oransi, a mod and a trucarbon.. If you just want to laser in on smells I suggest the tru carbon https://oransi.com/products/truecarbon-150c-air-purifier?srsltid=AfmBOoq_nwtKvBV8T0Gy7ORJgWdgex5ANMJtGIgrNELojcEzxabtnNBV

None of these are going to help with the litter box odors. They're all junk rebadged brands with very little activated carbon or other sorbents for gases/vapors/odors. The cheapest option is going to be the [Oransi TrueCarbon 150C](https://oransi.com/products/truecarbon-150c-air-purifier). It has 3.2 lbs. of potassium permanganate impregnated activated carbon. There's a 15% off discount pop-up on the product page if that helps. NB: I don't think the TrueCarbon has any sort of particulates filtration, so the grill and carbon filter may get clogged with dust. Might need to gently vacuum the carbon filter on a low setting.

The RabbitAir A3 is *terrible*. It has low particulate CADRs and the "Toxin Absorber"\* filter has too little sorbent media to be effective for higher or long-term concentrations of gases for the price. Seriously, it seems like a rip-off. Sorbent media is activated carbon, activated alumina, or synthetic zeolites. \*The name isn't even right - sorbent media like activated carbon works by the mechanism of *adsorption*, not absorption. If you have high levels of particulates **and** high levels of gases like VOCs, you need two types of air purifier. This is because heavyweight sorbent media purifiers have lower post-motor airflows and require the need for "dwell time" / "residence time" in comparison to particulates-focused air purifiers. To boot, heavyweight sorbent media purifiers tend to have little capacity for particulates removal, as the mechanical media filters have lower surface area. Unfortunately heavyweight sorbent media purifiers are expensive. And you may need to tailor the sorbent media to the gases present in your air by using a home test kit or paying for an environmental services contractor to conduct testing. This is because plain/untreated sorbent media does not have high removal efficiencies for all gaseous "species". Airpura and AllerAir make heavyweight sorbent media purifiers. The cheapest AllerAir units are around $560-$600. Airpura is more expensive. AllerAir offers over 40 custom blends of activated carbon for certain gases. Airpura has a few different activated carbons, such as potassium iodide impregnated AC or potassium permanganate AC. For the smallest rooms (the 10 x 10 and 12 x 14 ft. rooms specifically), you may be able to get away with an [Oransi TrueCarbon 150C](https://oransi.com/products/truecarbon-150c-air-purifier) for each. The TrueCarbon line uses 3.2 lbs. of potassium permanganate impregnated activated carbon. The DIY alternative is to build your own configuration via **AC Infinity** refillable carbon canisters, inline fans, and air filter boxes. However, you'd need to supply your own sorbent media; choices for modified sorbent media will be more limited. For separate particulates-focused air purifiers, I would be exceeding the [AHAM 2/3 rule](https://ahamverifide.org/ahams-air-filtration-standards/) (as mentioned in the AutoModerator comment). For instance, the 14 x 35 ft. room requires minimum CADRs of 327 CFM. But I would recommend CADRs anywhere from 350 CFM - 450 CFM. **Coway** brand purifiers are generally recommended first for their build quality. See the [particulates Buying Guide](https://docs.google.com/spreadsheets/d/16bOQoFE9rKYMlo1AR_cged3yRpxfmiey54U65UeBCR4/edit?gid=0#gid=0) for recommended Coway models, their CADRs, sound levels, and features.

Levoit (last I was told by customer support) uses a Recommended Practice (RP) and not a HEPA *standard* as such. Their purifiers will still clean your air. If your primary concern is odors, you need pounds of sorbent media. Sorbent media are activated carbon, activated alumina, or synthetic zeolites. Depending on the gaseous species responsible for the odors, you may need modified sorbents. This could be the case with rabbits. An example is potassium permanganate (KMnO₄) impregnated activated carbon. HEPA is mechanical filtration for particulates like small dust particles, smoke particles, pollen, pet dander, mold spores, PM2.5, etc. It won't mitigate the spread of odorous gas molecules. Brands like Levoit, Winix, Coway, Medify Air, Smart Air, Honeywell, etc. have little sorbent media for gases/vapors/odors. Unfortunately heavyweight sorbent media purifiers are very loud, very expensive, and clean the air more slowly than particulates-focused units. The "cheap" option is the [Oransi TrueCarbon 150C](https://oransi.com/products/truecarbon-150c-air-purifier). It uses 3.2 lbs. of KMnO₄ impregnated activated carbon. Unfortunately it's full price at the moment and sometimes comes down to \~$279. There's also a pop-up for 15% off on the TrueCarbon 150C's product page.

To be fair, you *can* place one in the kitchen. But there are very annoying drawbacks if you have no or a seriously inadequate range hood (e.g., grease build-up and high humidity prematurely saturating the sorbent media). The good news is you already have a vented range hood, so the worst of those pollutants should exhaust outside. I think using the Oransi TrueCarbon in the kitchen should be okay. Run the range hood on the highest airflow setting for any kind of frying, searing, grilling, steaming, or open pot boiling.

Portable hood by the window for capture. HEPA + big carbon purifier running high during + a few hours after. If money is tight: consider a DIY Corsi–Rosenthal box (for particles) + a smaller carbon purifier or the hood for odors. If money is not as tight and smoke is frequent: consider a smoke-focused purifier with heavy carbon (Winix 5510, Levoit large-room, Oransi TrueCarbon, Austin Air, etc.).

You need carbon filtration for odours, not just HEPA (which only filter out particulates). You need pounds of activated carbon. The Oransi TrueCarbon springs to mind, but it's expensive ($600) and the carbon filter would need to be replaced every few months ($100 a pop).

My husband has asthma and any generally reputable air purifier has helped with that. When it comes to smell, a charcoal air purifier is the answer. We use Oransi’s charcoal air purifier, which is a big initial investment but the filter only needs to be changed once a year so it breaks even with the cheaper purifiers that need filter replacements every month.

Oransi TrueCarbon is the answer. Whether it will actually work for your use case is another question. Also look into Austin Air, they have some cheaper units.

Under $500 you have exactly one odor purifier and that’s the Oransi TrueCarbon. There are others with a little carbon but not enough to mitigate cooking or pet odors.

Maximum CADR. VOC mitigation. I'd recommend a Smart Air Blast in the largest size you can afford, and also an Oransi TrueCarbon. Do you have forced hot air or forced hot water for heat?

It has the most carbon you can get for under $750.