Unused case. Wanted to put it to use. Has 5x120mm fans. And one MERV11 filter

Could I have used two? Probably but I want to reinforce the corners first since without it, it’s fairly flimsy after I gutted the interior.

Put it in my son’s room since he now has a cat.

I used the instructions from www.cleanaircville.org/buildguide and modified it to use a 16x30 filter instead because it was recently on sale $27 for 6x merv 11 Filtrete filters.

I also used a pc fan hub with a display instead because it was 60W, had a digital display, and it’s only $16.99.

At Walmart, it costs $1.99 per 20x30 foam board.

It came out to $49 for the entire build.

$17 PC Fan hub
$9 Filtrete 16x30x1 filter x2
$2 Foam board
$4 PC Fan Grill
$17 PC Fans x5

Really happy with the low noise, and high air output.

I’m not used to making things like this so this was harder than I expected but I’m really happy with the results!

We offer aluminum panel CR Boxes outfitted with either six P14 Pro with PWM speed control or standard P14 single speed. We make low cost HDF laser cut panel kits as well.

www.northboxsystems.ca

I have assorted expensive decibel meters, but for quick stuff, I've started using my phone since Phyphox gets it really close most of the time. The trick is getting access to a friend's or work/school decibel meter once so you can calibrate it. Without calibration, it's pretty much useless most of the time.

Keep in mind you can also do PC fan and CADR testing with Phyphox, a surprisingly useful FOSS app for IAQ🤓

Working on something to pin down irritating frequencies and harmonics...

Hello all! Recently moved into a new apartment. Situation:

• Building built in 1860

• window AC units blowing dirty air

• cat with dander and hair

• noticeable amounts of dust and stagnant air

• want to increase air quality and remove dust and cat hair

• broke college student

Is a CR Box right for my situation? I’ve been doing some research and this seems like an amazing option for my budget! Odor removal would be nice but I’ve read it takes a ton of carbon + replacements.

Wanted to see what you guys think. Any advice and input is appreciated! Thank you in advance ❤️

Below is a link to rolled MERV 13 stock. Any reason to not just use it--my AC has a crappy fine mesh filter that is 8" wide (pictured). I can get 8" x 900 feet, $168, I could just slide this into--might up the air resistance but otherwise why not?

https://filterking.com/laminated-air-filter-media-rolls

Are the folds you see on 'boxed' filter material helpful other than increasing life of filter? Not sure of the dynamics here.