r/crboxes is a subreddit with 14k members. The community frequently discusses fan, cr box, filters, crbox, and filter, and they frequently recommend/review fan, and the most common flair used is cr box build guide, question, and info/resource.
CR boxes are DIY (or buy) air purifiers that are much more efficient, affordable, and quiet than standard air purifiers. Show off your CR boxes, share tips on building them, and help reduce the transmission of Airborne diseases to end the ongoing Covid/SARS2 Pandemic.
CR boxes stands for: Corsi-Rosenthal boxes
CADR stands for: Clean Air Delivery Rate
CFM stands for: Cubic Feet per Minute. Also referred to as airflow, the CFM is how much air a fan moves.
Learn more at https://itsairborne.com
Popular Topics in r/crboxes
#1
Fan
28 posts
#2
Cr Box
25 posts
#3
Filters
21 posts
#4
Crbox
16 posts
#5
Filter
15 posts
#6
Box Fan
15 posts
#7
Box
13 posts
#8
Air
11 posts
#9
Build
11 posts
#10
Fans
10 posts
Products Discussed in r/crboxes
Fan
2 reviews
#1
Noctua
4.5★ from 2 reviews
Flair Used in r/crboxes
#1
CR Box Build Guide
: "Finally built myself a box"
18 posts
#2
Question
: "Help: why is the box in my office space getting dirty so fast?"
18 posts
#3
Info/Resource
: "Corsi Rosental Box 3d Printed"
6 posts
Member Growth in r/crboxes
Yearly
+9k members(162.6%)
Similar Subreddits to r/crboxes
About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/crboxes, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: June 7, 2026