Sizing
Dust collector size for a 22x22 two-car garage shop
The woodshop that fits a 22 x 22 ft garage has 6 machines with dust ports, the hungriest asking 400 CFM, so shop for a collector rated 500 CFM or more with 5 in branch duct (940 CFM if you run two gates at once). Of the Grizzly collectors in our data, G0860, G1028Z2, G0441 clear that bar.
The machines that fit this garage
| Machine | CFM at the hood | Branch duct |
|---|---|---|
| Planer (on the tool bench) | 400 | 5 in |
| Cabinet saw | 350 | 4 in |
| Bandsaw | 350 | 4 in |
| Miter station | 350 | 4 in |
| Jointer (on the tool bench) | 350 | 4 in |
| Drill press (on the tool bench) | 200 | 3 in |
This list comes from the 22x22 two-car woodshop layout, which packs machines into the floor with operator room. Every machine in the package fit, so every port is counted.
Collector rating and duct diameter
One open gate needs 400 CFM; with a 25 percent allowance for leakage and a loading filter that is 500 CFM. Duct diameter follows from the airflow at 4000 feet per minute: 400 CFM calls for a 4.3 in duct, rounded up to 5 in. A main line carrying two open gates (750 CFM) wants 6 in. Your longest straight run is roughly 44 ft along two walls, and every elbow and foot of flex hose cuts the airflow, so a collector's free-air rating is a ceiling, not a promise.
| Collector | Rated CFM | Clears one gate |
|---|---|---|
| Grizzly G0860, 1-1/2 HP, 868 CFM at 1.8 in SP | 868 | yes |
| Grizzly G1028Z2, 1-1/2 HP bag type, 1300 CFM bag rating | 1300 | yes |
| Grizzly G0441, 3 HP 240V, 1654 CFM at 2.0 in SP | 1654 | yes |
Small-bay options
If the collector itself will not fit, the usual fallback is a shop vacuum with a cyclone separator on one machine at a time: it works as a mobile station when the collector is parked against a wall. The dust collector calculator lets you tick your own machines.
Shop for this size
Matched to the result above.
Prices change often; the button shows today's price on Amazon.
Amazon and Grizzly, side by side
Each card shows an Amazon pick and a Grizzly Industrial pick for the same job.
Cyclone dust collector for a one-man shop
The Grizzly G0860 is a two-stage cyclone on 120V with a 1 micron canister; the Amazon pick is a bag-style 1 HP machine. The cyclone costs more and keeps the filter clean far longer.
3 HP cyclone collector (240V)
AmazonNo comparable Amazon item in our catalog
Nothing on Amazon in our catalog matches a 3 HP, 1654 CFM cyclone, so this one is Grizzly-direct only. It needs a 240V circuit and about 400 lb of freight.
Prices change often and Grizzly runs sales, so the buttons show current prices.
Get the garage shop planning checklist
One printable page: measure the bay, count the circuits, list the machines, check the floor. Plus a few short emails, then a couple a month at most.
Unsubscribe anytime. You can also just read the checklist on this site.Dust collector by garage size: the other answers
- Dust collector size for a 12x20 one-car garage shop
- Dust collector size for a 12x22 one-car garage shop
- Dust collector size for a 20x20 two-car garage shop
- Dust collector size for a 24x24 two-car garage shop
- Dust collector size for a 32x24 three-car garage shop
Frequently asked questions
Will a 1 HP dust collector work in a 22x22 two-car garage?
A 1 HP collector is rated around 560 CFM on the listings we carry, which clears one open gate here (500 CFM needed) only if the duct run is short. For 6 ported machines on 44 ft of duct, a collector in the 800 CFM class leaves margin.
Can I run the dust collector on 120V?
The Grizzly G0860 is a 1-1/2 HP, 120V collector at 15 A on the listing, so it needs its own 20 A circuit. The G0441 is a 3 HP, 240V machine at 22 A and needs a 240V circuit.
This page is researched guidance, not professional electrical, engineering or safety advice. Circuits, loads and clearances depend on your house, your service and your town: have a licensed electrician confirm any wiring, and check local code and each manufacturer's manual before you act.
