If you are in the Toronto area, UofT Medstore has a large qty of KN95 respirators at $.01 / box of 20. We've picked up 50 boxes and will toss in a 10-pack in every order we ship out to help distribute. 1/2 #CovidIsAirborne #KN95 #IndoorAirQuality

📣 End the year by taking one quick & easy step to push to improve the health & well-being of all Toronto residents: Sign Clean Indoor Air Toronto’s petition to our city’s Board of Health re. Health Canada's new IAQ guidance docs.google.com/forms/d/e/1F... 📣 #Toronto #ONhealth #ONpoli

Clean air for kids & staff in schools & daycares shouldn’t be controversial No IAQ policy at any level of govt ensuring indoor air is clean & safe to breathe atm Petition to Toronto Board of Health to direct TO Public Health to adopt Health🇨🇦's new IAQ Guidance preview.mailerlite.io/preview/1297...

In the Globe and Mail yesterday: #indoorairquality #CovidIsAirborne #schoolairquality

Our first production run of the aluminum bodied Polaris is sold out, while we are expecting more components in about 2 weeks you might be able to snag one of our Deluxe Kits from this fantastic charity that provides quality respirators to thousands of Canadians for free!

It’s here!!! 🎉 The North Box Polaris Air Purifier Kit is now available in our charity store. 💻 🛍️ 🛒 buymask.ca/products/north-box-polaris Built for larger, high-traffic spaces, the Polaris comes in two models: 🔹 Standard – one-speed 🔹 Ultra – built-in PWM speed control 🧵 1/2

The assembly video for the Northbox Polaris Ultra kit is now up! youtu.be/LMhaunCt1cQ?... #airpurifier #indoorairquality #CovidIsAirborne

Here is the assembly video for our Guardian portable air purifier. Starting at $139 for a bare kit. Deluxe kits come with four Arctic P14 fans. You just need to add two Ikea Starkvind filters. youtu.be/afgtS5N_s2I #airpurifier #CovidIsAirborne #IndoorAirQuality

The assembly video guide for our Polaris Standard PC fan based air purifier kit is now up! youtu.be/8BQs0rTcCFw?... #IndoorAirQuality #CovidIsAirborne #AirPurifier

Along with our new Polaris all-aluminum air purifier we are also offering the new Guardian, a low-cost portable device that uses a pair of inexpensive Ikea Starkvind filters and four Arctic P14 fans. Kits start at $139 and a fully build device is $239 CAN.

Pleased to finally have the Polaris aluminum bodied air purifier up on our website and available. Initial quantities are limited as we are still working out a few supply chain issues. #indoorairquality #airpurifier #CovidIsAirborne 1/3

A look inside the Polaris ULTRA, this version comes with a PWM control board so you can use multi-speed fans. Pre-built systems and Deluxe kits come with Arctic's new P14 Pro fans but experimenters can use any 12volt PWM fans. #airpurifier #indoorairquality #covidisairborne

After some finagling to get the assembly procedure just right we are finally releasing the aluminum bodied POLARIS air purifier, made-in-Canada and based on the open-source design by Zack Deis. 1/3 #airpurifier #indoorairquality #covidisairborne

After a few different prototypes, the Guardian, our most affordable air purifier, is finally ready. #IndoorAirQuality #CovidIsAirborne #AirPurifier 1/2

Our MINI-SC is entirely built by hand and takes quite a while to make but it's just so much fun to put together! #airpurifier #indoorairquality #covidisairborne

Checking out some nifty digital timers to add automation control to an air purifier. Up to 15Amps so you can have multiple units controlled. Great for classrooms where you can just hit the 8-hour button and you are good! #indoorairquality #covidisnotover

COVID Isn’t a Cold. It’s Cigarettes All Over Again. 5 years into this experiment: we let COVID rip and pretended it was fine. Damage piled up—unlike smoking’s slow toll, we’re seeing it in real time. Every infection leaves a mark; even “mild.” The bill comes due. We chose denial archive.md/Jyi7k

We'd only been in BC a month or so when a wildfire rained ash on our car and smogged up our apartment. Worked with the folks @northboxsystems.bsky.social (thanks to a rec from @cleanairkits.bsky.social) and got a custom air purifier together with adjustable speed fans. No more proprietary filters!

Whole bunch of different stuff on the bench today, including some prototypes we are working on! #IndoorAirQuality #COVIDisAirborne #airpurifier

Realizing the original 8 x 80mm fan was misguided, here is the redesigned Guardian. My goal was to make the cheapest, quietest and most portable solution. Aiming for chemo patients going into hospital, it can be a great solution for any smaller space. 1/2

I really should get the bench better organized!

Always encouraging to hear great feedback from people using our stuff!

I should have grabbed a photo but wanted to be sure to post a quick "Thank you!" to @northboxsystems.bsky.social and my pair of North Box 5X Classics for keeping my TAs safer during our training workshop yesterday. These beasts are so quiet no one has ever noticed them until they actually see them.

The truth about Sweden, Covid is a portal, Lower life expectancy baseline, and more johndupuis.substack.com/p/we-havent-...

This is an important potential treatment for Long Covid:

Our first shipment of fans has finally made it in! Over the next several days we will be getting as many of our air purifier kits and units out to everyone who placed an order...thanks for your patience! #IndoorAirQuality #CovidIsNotOver #AirPurifier

Here's a video outlining the assembly procedure for the Guardian portable air purifier kit: youtu.be/OpsFtNsCGp0?...

Here is a very small, quiet and easy to assemble air purifier that can be given to cancer patients upon entering hospital for treatment while their immune system will be suppressed. I'm hoping a charity might be interested in distributing it. It's called the Guardian: youtu.be/OpsFtNsCGp0 1/2

Some elements of our supply chain rely on US warehouses and all the tariff uncertainty led to a month long delay for the PC fans we use. Thankfully we are expecting a big shipment this week. We have prepared a lot of panels so we will be ready to ship asap!

Air Quality in Toronto not so great today. If you need to be outside, quality respirators are available at donatemask.ca at no cost if you can't afford them. #CleanAir #WildfireSmoke #MaskUp

We've just posted the updated kit assembly video for our North Box MINI-SC portable air purifier, now with electronic speed control! youtu.be/FvwPNqbxTV8?...

Andry’s story, if you’re unfamiliar. www.cnn.com/2025/05/28/a...

Amazing deal on Ikea's cute little air quality monitor, not big on detailed analysis but does a good job at giving you a general sense of your IAQ, only $5.99! www.ikea.com/ca/en/p/vind...

An excellent resource provided by the NCBI, use it before it most likely gets shut down! Searching for "air purifier" brings up a huge number of studies: ncbi.nlm.nih.gov/research/cor... #NCBI #CovidIsNotOver #AirPurifier

Advocate for Continuous Indoor Air Quality Monitoring For all public places Classrooms Hospitals Offices Shops Social Housing Help #SeeTheAir to #TakeAction for #HealthyBuildings 🌐 #IAQStandards #GOAQS @seetheair.bsky.social

On #CleanAirDay, it's crucial to share how important it is to also think about air quality indoors. Using a HEPA air purifier, North Box PC-fan air purifier, or CR box can help! 🏠💨 #CleanAir #AirQuality

Air quality very poor in Toronto today, an N95 mask outdoors and air purifiers indoors would be a good idea. #wildfires #airquality

Vaccines are one of the most important tools we have to control the spread of Covid: youtu.be/oZBeepHwTtQ?... #Covidisnotover

First batch of a total of six 6XL air purifiers on their way to BC to help treat the air for firefighting crews who will be spending time in mobile facilities close to the wildfires. #wildfire #indoorairquality

Though our air purifiers can help keep your indoor air safe during wildfire season, filters should be changed after a major smoke event as their electrostatic properties can be compromised. #wildfiresmoke #wildfires #cleantheair #COVIDisAirborne

Buying one of our kits through Donate A Mask helps provide high quality N95 respirators to those who can't afford them!

Heart breaking story and a wake up call for those who think Covid is "just a cold": youtu.be/vqeIeIcDHD0?... #CovidIsAirborne #CleanAir #CovidisnotOver

DYK how many masks has Donate A Mask shipped through our Free Request Program? 😷 Any guesses? The answer's in the comments--but while we have your attention, make a donation to help us keep up this work! 🙏🏻 donatemask.ca/fundraiser #YallMasking #CommunityHealth #Mask #MaskUp

Our air purifiers can help mitigate the risk of wildfire smoke particles. It's a good idea to have plenty of extra filters as a serious wildfire event can adversely affect their electrostatic properties. #WildfireSmoke #CleanTheAir #IndoorAirQuality

Picking a wellness influencer as Surgeon General of the United States speaks to the deep connections between "natural health" and the extreme right. The conspirituality hustle will have serious impacts on public health. My latest. charlieangus.substack.com/p/maga-measl...

"For me, the answer now lies in refusal, the withdrawal of participation from systems that require dishonesty as the price of belonging." Today I am resigning from the National Science Board and the Library of Congress Scholars Council. I wrote about my decision in TIME. time.com/7285045/resi...

The MINI, our portable air purifier, is now the MINI-SC with built-in speed control. Throttle between an insane 5000 rpm to whisper quiet operation. Great when you need to clear a hotel room fast and then settle in for the night! youtu.be/yM8Je_6yw_E?... #IndoorAirQuality

Meanwhile, this study emphasises the vital role of strategic air purifiers in reducing airborne infection risks & enhancing patient safety in healthcare environments: 'Their optimal placement in hospital wards can significantly improve air quality.' www.journalofhospitalinfection.com/article/S019...

Speed control tests for our POLARIS air purifier, a metal version of our 6XL but with more powerful fans that can be controlled for quiet operation when needed. youtu.be/XUh_YNT0pUk #CleanAirForKids #COVIDisAirborne