The Can 50 is an Original Can-Filter passive inline carbon filter rated at 420 CFM of exhaust airflow — you connect it to a matching exhaust fan so grow-room air passes through the granular activated-carbon bed before it leaves the space. It ships without a flange so you fit the 6, 8 or 10 inch flange that matches your fan. This page gives the published dimensions, weights, carbon and airflow specs, explains how activated-carbon adsorption works, and gives an honest account of what is and is not sourced — all cited.
What it is
The Can 50 is a cylindrical inline carbon filter from the Original Can-Filter line. Air is drawn through a granular activated-carbon packed bed — Can-Filters describes the Original line as using the industry’s thickest carbon bed while maintaining minimal pressure drop, designed for the control of VOCs (paint fumes, hydrocarbons) and other gaseous contaminants. Unlike the built-in-flange Can-Lite series, the Can 50 ships without a flange so you choose the collar that fits your fan, and it includes a pre-filter sleeve. It requires no electricity — it is a passive media filter, not a powered air purifier.
Guaranteed analysis and specifications
These Can-50-specific figures trace to the carrying retailer listing that reproduces the Can 50 label (the maker’s current site lists the line only from the Can-Filter 100 up), corroborated across listings.
| Max exhaust airflow | 420 CFM (713 m³/h) |
|---|---|
| Max recirculating (scrubbing) airflow | 840 CFM (1426 m³/h) |
| Recommended minimum airflow | 210 CFM (357 m³/h) |
| Flange (sold separately) | 6, 8 or 10 inch |
| Outside diameter (with pre-filter) | 16.5 inches |
| Height (with pre-filter) | 19.7 inches |
| Total weight | 55 lbs |
| Carbon weight | 42 lbs |
| Carbon bed depth | 2.56 inches |
| Carbon type | granular virgin activated carbon |
| Max operating temperature | 80°C (176°F) |
| Pressure drop at max CFM | 180 Pa (0.75 in wg) |
| Pre-filter included | yes — pre-filter sleeve included |
Why choose the Can 50
- Thick carbon bed. The Original Can-Filter design uses the industry’s thickest granular-carbon packed bed; on the Can 50 that bed measures 2.56 inches deep — the mass of adsorbent directly limits how long the bed adsorbs before it saturates.
- Substantial carbon charge. The filter carries 42 lbs of carbon out of a 55 lb total weight — most of the unit is adsorbent, not housing.
- Flexible flange fit. Because it ships without a flange (6, 8 or 10 inch options), you match the collar to the fan you already own rather than being locked to one duct size.
- Wide airflow window. Rated from a 210 CFM minimum up to 420 CFM in exhaust, the Can 50 suits small-to-medium tents and rooms.
- Conservative rating. Can-Filters rates the Original line at a conservative 0.1 second carbon-contact time, which is the design margin that gives the filter its odour-control headroom.
How activated-carbon adsorption works
The Can 50 is a passive adsorption filter: no electricity, no UV, no chemicals. As exhaust air is pulled through the carbon bed by a fan, volatile organic compounds (VOCs) — including the terpenes and other odour-causing molecules produced by plants — transfer from the air stream to the solid surface of the activated-carbon adsorbent, removing them from the air. There is a physical limit to the mass of pollutants an adsorbent can hold; once adsorption sites are occupied (saturation), odour-causing compounds pass through rather than being captured. A deeper carbon bed presents more adsorbent to the passing air and a longer contact path, which is why bed depth and carbon mass, not just filter diameter, govern how long a filter works before breakthrough.
Best uses for the Can 50
- Small-to-medium grow-room exhaust. The 420 CFM exhaust rating matches a single mid-size inline fan pulling all room air through the bed before it exits.
- Recirculating scrubbing. Run inside the room in a closed loop, the maker-line design supports scrubbing up to 840 CFM — useful in sealed rooms with CO² enrichment where you do not vent to outside.
- Odour-sensitive locations. Any cultivation space where airborne VOCs must be controlled before air reaches an adjacent room or the outdoors.
Compatibility — flanges, fans and ducting
The Can 50 ships without a flange, so choose the 6, 8 or 10 inch flange that matches your inline fan and duct run. Size the fan to the filter, not the other way around: do not push more than the 420 CFM exhaust maximum through it, because forcing air faster than the bed can adsorb reduces effectiveness, and do not fall below the 210 CFM minimum. Account for the 180 Pa (0.75 in wg) pressure drop at maximum airflow when you pick a fan — the fan must overcome the filter’s resistance plus the ducting.
Comparison — Can 50 vs a larger Original Can-Filter
The Can 50 is the small end of the Original line; the larger models trade size and weight for airflow. Use this to right-size for your room. No warranty rows are included (see Honest Fit).
| Factor | Can 50 | Larger Original Can-Filter (typical) |
|---|---|---|
| Max exhaust CFM | 420 CFM | higher — e.g. the Can-Filter 100 is rated markedly larger (see that listing) |
| Outside diameter | 16.5 inches | larger diameter — needs more headroom |
| Total weight | 55 lbs | heavier — plan the hang-point |
| Carbon weight | 42 lbs | more carbon — greater adsorption capacity |
| Best fit | small-to-medium tents and rooms | large rooms, high-volume exhaust |
For lighter-duty or maintenance-free odour control, gel and dispenser options such as the Ona Gel Apple Crumble or the Ona Breeze Dispenser neutralise odours without ducting, though they do not filter exhaust air the way a carbon bed does.
Frequently asked questions
Does the Can 50 come with a flange? No — it ships without a flange so you fit the 6, 8 or 10 inch collar that matches your fan.
What fan CFM should I pair with it? Stay between the 210 CFM minimum and the 420 CFM exhaust maximum.
What does it weigh? Total weight is 55 lbs, of which 42 lbs is carbon — plan your hang-point accordingly.
Does it need power? No. The Can 50 is a passive media filter — no electrical connection. The exhaust fan you pair it with provides all the airflow; the filter itself is unpowered.
What is the max temperature rating? 80°C (176°F) maximum operating temperature — normal grow-room exhaust is well within this range.
Who this is for — and who should skip it
Suited: growers running a small-to-medium indoor space who need passive, carbon-bed odour control matched to a fan in the 210–420 CFM range who want to choose their own flange size.
Not for / its limits: it is a passive adsorption filter — it does not lower temperature, reduce humidity, or kill pathogens, and it does not include a fan or flange. The carbon bed has a finite capacity: once adsorption sites are occupied, breakthrough occurs and odour control degrades, so the bed eventually needs replacement.
HELD (not stated because not sourced this session): the maker’s own current website no longer hosts a Can 50 product page (its Can-Filter line begins at the Can-Filter 100), so every Can-50-specific number above is grounded to a carrying retailer that reproduces the label, not to a live maker spec sheet; carbon-bed service life / replacement interval (no source publishes a figure); warranty term or duration (not stated, per M-05); price (varies by retailer, held out of body); exact efficacy against any specific VOC compound; certifications; and any adsorption molecular-weight range — no operator-approved Tier-1 authority is cited, so only the universal qualitative behaviour of adsorption is stated, never a numeric bound. The maker line’s “thickest carbon bed” and “0.1 second contact time” phrasing is attributed to Can-Filters as a line-level marketing/mechanism claim, not an independently measured Can-50 figure.
Ready to size your exhaust system? Add to cart, or talk to a grower about matching this filter to your fan and room volume.
Sources
- Rightbud — Can-Filter 50 Carbon Filter without Flange product listing (max exhaust CFM, max recirculating CFM, recommended minimum airflow, flange options, outside diameter, height, total weight, carbon weight, carbon bed depth, carbon type, max operating temperature, pressure drop, and pre-filter inclusion; reproduces the Can 50 label; HTTP 200, retrieved 2026-07-08): https://rightbud.com/products/can-filter-50-carbon-filter-without-flange
- HTG Supply — Can 50 Carbon Filter listing (corroborating dimensions, bed depth, airflow and pre-filter; HTTP 200, retrieved 2026-07-08): https://www.htgsupply.com/products/can-50-carbon-filter/
- Can-Filters — Original Can-Filter category page (line-level mechanism / marketing: granular packed-bed design, industry’s thickest carbon bed, VOC-control design, conservative 0.1 second contact time; the maker site does not host a Can 50 product page, so Can-50-specific figures are grounded to the carrying retailers above; HTTP 200, retrieved 2026-07-08): https://canfilters.com/products/filters/can-filter/
- Activated-carbon adsorption mechanism, saturation and breakthrough — stated as universal physical chemistry (physics-definitional): a gaseous pollutant transfers from the air stream to the solid adsorbent surface, and each adsorbent has a finite site capacity, so once its sites are occupied the compounds break through. No external authority is relied on, and no product-specific or numeric adsorption figure is asserted (any specific molecular-weight range is HELD — see Honest Fit).
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