I've launched a free bi-weekly newsletter: The Air Quality Index. Independent air quality testing, honest reviews, and findings that don't always make it into the full articles. Subscribe for free: breathesafeair.beehiiv.com

A list of some of the best Black Friday deals for air quality monitors. (The Aranet4 Home can currently be found for almost 50% off!). forum.breathesafeair.com/t/black-frid...

If you're interested in getting an Aranet4 Home, now is a good time as the monitor is currently 30% off, and you can save a further 5% with the code BREATHESAFEARANET. There are also some discounts on their other monitors and bundles! aranet.com/en/home

Most air quality monitor 'reviews' don't even cover the important aspects. This is an interesting read, and one of the reasons I don't trust most websites when it comes to reviews of air quality monitors www.airgradient.com/blog/wired-r...

Is the super affordable INKBIRD PTH-10C carbon dioxide monitor worth it? breathesafeair.com/inkbird-pth-...

I’ve been asked about this inexpensive CO2 monitor many times, so I finally decided to pick one up to see if it’s better than the Vitalight (another affordable option). I paid a total of $34 for this, so I’m hoping it’s at least accurate because it could be a compelling budget option!

Finally! I built & tested an open-source concept model air purifier that should be good for schools. Lots of air (CADR > 420 CFM), quiet (<45 dBA), uses <9 W, and ‘cause it’s wall-mounted & down-blowing, it moves air in the right direction & takes up no floor space. Always check my ALTs🧵⬇️

Hey CC, LC, and IAQ folks: Ethan from @breathesafeair.bsky.social has a newly updated list of top CO2 monitors (updated on of Mar 26, 2025): breathesafeair.com/carbon-dioxi...

I’ve been super busy with work, so I haven’t had as much time to write recently, but I am currently working on a full review for the ultra-compact Airspothealth CO2 monitor. This monitor is so convenient to carry around, and I love it for that reason.

Bloody brilliant!

Livegrid is a super cool Tamagotchi-inspired CO2 monitor that allows you to grow fish in a digital aquarium by maintaining good air quality. I'm very excited to review it in the coming weeks!

Temtop S1+ Review - the most affordable portable PM.5 monitor! breathesafeair.com/temtop-s1-re...

If you are in L.A. and impacted by wildfire smoke, AirGradient is currently donating 25 monitors (and potentially more). You can express interest by filling out the Google Form at the end of this article. www.airgradient.com/blog/los-ang...

Wildfire smoke and how to protect yourself. breathesafeair.com/wildfire-smo...

The AirValent TravelLite is a new CO2 monitor that shares the internals of the AirValent CO2 monitor but has a plastic housing and comes in at a lower price point. Full review coming soon!

After a lot of contemplation, I’ve decided to launch a Ko-Fi page for anyone interested in supporting BreatheSafeAir. All donations will go towards improving the site and writing new articles! ko-fi.com/breathesafeair

Full review of the AirFanta G2 Air Quality Monitor by @adamwong.bsky.social! breathesafeair.com/airfanta-g2-...

The Qingping Air Monitor Lite is one of the best affordable air quality monitors out there. Measuring both CO2 and PM, it gives a better overview than devices like the Aranet4. breathesafeair.com/qingping-air...

AirGradient ONE review - An open source indoor air quality monitor. breathesafeair.com/airgradient-...

A full review of the AirFanta 3Pro from @adamwong.bsky.social. Overall, a highly performant air purifier with a low price tag! breathesafeair.com/airfanta-3pr...

The Aranet Radon Plus has quickly become my favourite radon monitor simply due to how great the connectivity is (the other radon monitors I've tried have been horrible in this regard). breathesafeair.com/aranet-radon...

If you have any questions about air quality monitors, air pollution, or adjacent topics, please feel free to head to the forum and join in the conversation! forum.breathesafeair.com

Free CO2 monitor giveaway! Ends in about eight hours. I apologies for the X link - next time I run such a giveaway I will make sure to post it here, too. x.com/safe_breathe...

Interested in a portable air purifier? Check out my QT3 review to see how it performs. breathesafeair.com/smartair-qt3...

Some good news here. 1. Amazon finally approved our 4Lite to available for California. You can order it from amazon.com or air-fanta.com. 2. We have some 4Lite arrived in Amazon UK, you can order it from amazon.co.uk. Just in time for the Black Friday. 😀

Some first thoughts on the @smartairuk.bsky.social QT3! forum.breathesafeair.com/t/smartair-q...

Another exciting review is on the horizon! This time for the AirFanta 3Pro. I'm very excited to give this a try as I’ve heard many good things about it. If you’ve used one before, I’d love to hear your thoughts!

The Temtop M10+ might be a decent choice as a portable/indoor air quality monitor. So far, I appreciate the size and form factor. I'm curious how it will perform, though. forum.breathesafeair.com/t/temtop-m10...

The INKBIRD IAM-T1 is a popular alternative to the Aranet4 Home with 95% of the functionality. While I don't recommend it at full price (as it's very similar to the Aranet4), it's a great device when on sale! breathesafeair.com/inkbird-iam-...

I've been testing a carbon monoxide monitor over the past month, and it's interesting to see how, even in outdoor air, the concentration can begin to climb. The highest concentration I saw outside was 31 ppm, near a very busy road.

Air pollution in India - everything you need to know. breathesafeair.com/air-pollutio...

The IKEA Vyndstyrka is an exciting product because, if it performs well, it will be one of the first air quality monitors available at a large retailer, and it will also significantly lower the cost of monitoring your air. breathesafeair.com/ikea-vindsty...

My list of the best carbon dioxide monitors is now updated to include the @smartairuk.bsky.social CO2 Monitor. What is your preferred carbon dioxide monitor? breathesafeair.com/carbon-dioxi...

The best affordable carbon dioxide monitor! After spending around a month with the device, I've finally finished my review of the @smartairuk.bsky.social CO2 Monitor. Read the full review below! breathesafeair.com/smartair-co2...