The short answer: a shop vac is fine for most hobbyists. A dust extractor is better for anyone who sands or routes for more than an hour a week. Here is why.
What a Shop Vac Is
A shop vac is a wet-dry vacuum designed for general cleanup. It moves a lot of air at moderate suction. The standard filter in a shop vac stops particles down to about 1 to 5 microns, depending on the filter quality.
Shop vacs cost $60 to $200. They work well for sawdust, chips, and spills. The main limitation is filtration. Standard shop vac filters are not HEPA. Fine dust from sanding passes through and blows back into the air.
What a Dust Extractor Is
A dust extractor is built specifically for capturing fine dust from power tools. It runs at lower volume but higher static pressure than a shop vac. The filters are HEPA grade. They capture particles down to 0.3 microns at 99.97 percent efficiency.
Dust extractors cost $300 to $800 for mid-range units. Festool, Bosch, and Makita make the most common ones. They typically use self-cleaning filters that pulse to shake dust off the filter while running, which keeps suction constant.
The Key Difference: Filter Class
In Europe, vacuum filters are rated by class: L (low hazard), M (medium hazard), and H (high hazard). Most woodworking produces Class M dust. Hardwoods like oak, beech, and walnut can be Class H because the dust is known to cause nasal cancer with long-term exposure.
A standard shop vac is not rated for Class M or H work. A dust extractor with a Class M filter is the minimum for regular woodworking.
| Type | Filter Class | Min Particle Size | Best For |
|---|---|---|---|
| Standard shop vac | Not rated | ~5 micron | General cleanup, chips |
| Shop vac + HEPA filter | Approximate H | 0.3 micron | Most woodworking |
| Class M extractor | M | 0.3 micron | Regular sanding and routing |
| Class H extractor | H | 0.3 micron | Hardwoods, MDF, fiberglass |
CFM vs Static Pressure
Shop vacs are rated in CFM (cubic feet per minute). A typical 6-gallon shop vac moves 140 to 180 CFM. This is good for picking up chips and debris.
Dust extractors are rated in both CFM and static pressure. They often move less CFM but more static pressure. This matters for through-the-pad sanding, where air has to pull through small holes in the sanding pad. Low static pressure means the suction stalls at the hole. High static pressure keeps pulling even when the path is restricted.
For connecting to tool ports and running a hose, shop vac CFM is sufficient. For professional sanding systems with restricted-flow pads, a proper extractor is better.
Noise Level
Shop vacs are loud. Most run at 72 to 80 dB. A dust extractor runs at 62 to 70 dB. That is a meaningful difference. At 70 dB, you can have a conversation in the same room. At 80 dB, you cannot.
If you work in a shared space, a garage near your house, or a basement below a living area, noise matters. Dust extractors are worth the price for sound alone in many situations.
Which One Should You Buy?
Buy a shop vac with a HEPA filter bag if you:
- Do light woodworking a few times a month
- Primarily work with a miter saw, circular saw, or drill
- Want to keep costs under $150
Buy a Class M dust extractor if you:
- Sand or route for more than 30 minutes at a time
- Work with MDF, plywood, or hardwoods regularly
- Have a home shop near living spaces
- Are a professional or serious hobbyist
What About Adapters?
Both shop vacs and dust extractors use similar hose sizes. The main sizes are 1-1/4 inch, 1-7/8 inch, 35mm, and 36mm. The hose end that attaches to the tool needs to match the tool port. The other end needs to match your vacuum inlet.
Our configurator handles both. Select your tool, select your vacuum brand, and it finds the right adapter for your specific combination.