r/crboxes
CR Boxes
Founded April 2023 · Public — anyone can post
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
Members
20,598
21K
Online now
—
not captured in the last snapshot
Posts per day
2.7
from the last 100 posts, spanning 37.3 days
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
—
not enough history yet
Promo tolerance
—
not assessed yet
Last post
Sep 5
sampled Sep 5
Distinct posters
83%
of the last 100 posts
Tracking since Sep 5 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
Tracking since Sep 5 — growth charts appear after a week of history.
Similar by content
Communities that discuss what r/crboxes discusses.
A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).
Helping you create a cleaner, healthier, more comfortable home. Sharing simple, practical tips for fresher air, better sleep, allergy relief, and easier everyday living.
Dedicated to the discussion of residential air to water heat pumps and related equipment.
A subreddit for Heating, Ventilation, & Air Conditioning Technicians. If you are not a member of the trade, please post in r/hvacadvice.
A community dedicated to share and discuss 3D prints that have a specific, practical function or use in everyday life.
See the full lists on similar subreddits.
r/crboxes — frequently asked
How many members does r/crboxes have?
r/crboxes has 20,598 members as of our most recent crawl on Sep 5. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/crboxes growing?
We don't have 30 days of snapshot history for r/crboxes yet, so we're not going to invent a growth number. We've been tracking it since Sep 5; the chart fills in as history accumulates.
How active is r/crboxes?
Around 2.7 posts per day, measured from the newest 100 posts on Reddit, which span 37.3 days. Posting rate matters more than subscriber count when you're deciding where to spend your time — it determines how long your comment stays visible.
When was r/crboxes created?
r/crboxes was founded in April 2023 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Who posts in r/crboxes?
Of the last 100 posts we sampled, 83% came from distinct accounts; the newest was published Sep 5. A low share means a feed dominated by a handful of accounts (bots, mods, or one prolific poster) rather than a community.
Can I promote my product in r/crboxes?
We don't have a promo-tolerance read for r/crboxes yet. Default to the safe approach: read the sidebar rules, contribute in threads where you gain nothing, and mention your product only when it is the honest answer to someone's question.
How do I monitor r/crboxes for mentions?
Hit Watch on this page. Prowlo starts crawling r/crboxes into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/crboxes's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/crboxes's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
Read-only · Human-in-the-loop
Prowlo never posts for you