Wall-mount vs portable dust collector for a garage shop

• The garage has to park a car and the machines stay put. A wall-mount takes no floor. In a 12 x 20 ft one-car bay, where our layout engine fits a cyclone-class collector only when the car is out, a wall-mount is the way to keep a collector at all.
• You are building a fixed duct system. A 4 in main on the wall with blast gates at each machine is a clean job when the collector hangs at one end.
• You want the shop to be quick to clear. No cart to move, no hose to coil. Close the blast gates and the system is out of the way.
• You have a framed wall with studs, or masonry you can anchor into. A collector vibrates; the mounting is part of the purchase.

• You rent or you may move. A portable leaves with you. Duct on the wall does not.
• The machines move around the bay. If the table saw is on a mobile base, the bandsaw is on a mobile base and the layout changes with the project, a collector on casters follows.
• You have no wall. A garage with a finished interior wall and no studs you want to open, or a wall already full of shelves, does not take a wall-mount.
• You want 240V later. The G1028Z2 lists 6 A at 240V as well as 12 A at 120V, so the same collector moves to 240V when you add the circuit.

The wall-mount, because it takes none of the floor. That is its whole case, and in a garage it is a strong one. A portable collector has a footprint of its own and a clearance zone around it for the hose and for emptying the bag. In our layout engine, floor items carry a 12 in clearance halo, and the car adds walk-around and apron requirements. Take the collector off the floor, and the bay gets easier to plan.

The floor space is worth a number. In a 12 x 20 ft bay, our engine fits a collector of the Grizzly G0860 class only when the car is out. A collector on the wall changes that. The practical caveat is that a wall-mount hangs at head height, so the wall it hangs on cannot also hold the workbench, the pegboard and the cabinets. Look at the 12 x 20 ft woodshop layout and the 12 x 22 ft layout to see what the wall budget looks like.

The portable is the opposite: it takes floor but is easy to put away against the wall, and it can be used on a machine at one end of the bay and then at the other end.

A collector moves air through a duct, and the duct decides how much arrives at the machine. At 4,000 fpm, a 4 in duct carries 349 CFM, a 5 in duct carries 545, and a 6 in duct carries 785. A table saw or a bandsaw asks for 350 CFM at the hood, a planer 400, a sander 550. Those are our machine table figures, not measurements.

A wall-mount is a natural fit for a fixed system: a short main, a few branches, and a blast gate at each machine. The collector is at the end of the run and the duct runs the length of the wall. The shorter and smoother the run, the more airflow arrives. The G1028Z2 listing gives a 6 in inlet Y with two 4 in openings, which means it takes two 4 in hoses at once; that is a convenient layout for two machines side by side.

A portable with a flex hose is the loss-heavy option. Flexible hose has a lot more resistance than smooth pipe, and a long hose crossing the floor is a trip hazard in a garage that also parks a car. The compromise is a short fixed main at one end of the bay and a portable that parks at the main. The dust collector calculator turns your machine list into a required CFM.

The airflow figures on a Grizzly listing differ in kind: the G1028Z2 lists a bag rating of 1300 CFM, which is a free-air figure. The G0860 lists 868 CFM at 1.8 in of static pressure. Do not compare a free-air number to a loaded one. We have no CFM figure for the G0785 in our briefs, so read the listing.

The G1028Z2 is listed at 12 A at 120V, or 6 A at 240V. At 125 percent, 12 A is 15 A, which points to a 15 or 20 A circuit with 14 or 12 AWG; the NEC 60 C column gives 14 AWG as 15 A (Table 310.16). The 240V option halves the current in the same wire. For a 1 HP motor, NEC Table 430.248 gives 16 A at 115V and 8 A at 230V. A licensed electrician should confirm the circuit for any of them.

A wall-mount adds a second job: the mounting. The collector hangs from a bracket or a French cleat on studs, with the weight read from the listing. Do not mount it on drywall alone. Allow for the vibration with isolating pads, and place it where you can reach the filter and the bag or drum without a ladder. Mounted high, the collector's intake also sits high, so the duct comes down to the machines; plan the main so it slopes toward the collector and does not trap chips.

If the garage is attached and shares a wall with living space, a wall-mount transmits more vibration through the wall than a portable on the floor. Isolation pads and a flexible connection to the duct help.

Both kinds are loud. The motor and the impeller are the noise, wherever they sit. Wear hearing protection such as the Decibel Defense muffs and keep the door closed near neighbors.

Filters decide the dust that reaches the car. The bag-style portable and the bag-style wall-mount both use fabric, which clogs on fine dust. The G0785 uses a canister, which cleans better. A wall-mount canister keeps more fine dust out of the bay than a bag, and a portable bag keeps the least. Whatever you choose, add a hanging filter: the G0738 lists 260, 362 and 409 CFM and a 1 micron inner filter, and its sheet is the G0738 fit sheet. For a ranked list, see the air filtration roundup.

The Amazon pair mirrors the Grizzly pair. The POWERTEC 1 HP, 560 CFM wall-mount uses collector bags with a 1 micron rating on its listing, where the Grizzly wall-mount uses a canister. The POWERTEC portable has the same 1 HP, 560 CFM motor on casters. The listing is the place to read the dimensions. The cards below show the Amazon and Grizzly buttons side by side for each. For the bag against canister against cyclone decision, read the three-way comparison.

Hang the collector if the layout is settled, the wall is solid and the car needs the floor. Roll it if you rent, if the layout changes and if you want to move to 240V later. A good compromise in a two-car garage is a wall-mount at the end of a short fixed main for the big machines and a shop vac with a separator for handheld tools; that arrangement leaves the floor clear and avoids a long hose. See shop vac against dust collector for that second half.

Wall-mount for a fixed shop and a bay that must park a car; portable for a shop that moves. The G0785 keeps the floor clear; the G1028Z2 rolls to the machine and moves to 240V later. Both are 120V-friendly and neither is a cyclone, so if fine dust or a clean filter is the priority, look at the G0860 first. The dust collector roundup has all three tiers.