Greenworks vs Stihl Wet Dry Vacuum

Greenworks vs Stihl Wet Dry Vacuum: Which Brand Makes the Better Shop Vac?

Greenworks and Stihl are both respected names in outdoor power equipment, but their wet dry vacuums serve different priorities. Greenworks focuses on affordable corded power with large tank capacities, while Stihl brings its professional-grade battery ecosystem into the shop vacuum category. This comparison breaks down the key differences to help you decide which one fits your workshop or job site.

Greenworks Wet Dry Vacuum: Overview and Key Models

Greenworks offers a range of corded wet dry vacuums that prioritize suction power and value. The most popular model is the Greenworks 12-Amp 6-Gallon Wet Dry Vacuum, which delivers strong performance for general workshop cleanup, car detailing, and home renovation projects. Greenworks also makes a 4-Gallon and 8-Gallon version, but the 6-Gallon strikes the best balance between portability and capacity.

All Greenworks wet dry vacuums use a standard 12-Amp motor that produces up to 200 CFM of airflow and 70 inches of water lift. They include a reusable foam filter for wet pickup and a pleated cartridge filter for dry vacuuming. The tanks are made from blow-molded plastic that resists dents and rust. Greenworks vacuums come with a 4-year warranty, which is competitive for the price point.

Owner reviews on retailer sites consistently praise the Greenworks 6-Gallon for its suction power and ease of use. The most common complaints are about the hose being somewhat stiff in cold weather and the wheels being small for rough surfaces. Overall, Greenworks is a strong choice for homeowners who need a reliable corded shop vacuum without spending a premium.

Stihl Wet Dry Vacuum: Overview and Key Models

Stihl enters the wet dry vacuum market with a different philosophy: battery-powered portability and professional build quality. The Stihl SE 31 is the company's primary model, designed to work with the Stihl AK battery system (20V or 36V). This makes it ideal for users who already own Stihl outdoor power tools like trimmers and blowers, as they can share batteries.

The Stihl SE 31 features a 5.3-gallon tank capacity and runs on a 36V battery for maximum runtime. It produces 130 CFM of airflow and 60 inches of water lift, which is less than the Greenworks corded model but impressive for a battery-powered vacuum. Stihl includes a flat pleated filter with a cleaning mechanism that extends filter life. The vacuum also has a blower function, allowing you to switch from vacuum to blower mode for clearing debris.

Owner reviews highlight the Stihl SE 31's excellent build quality and quiet operation. The main drawbacks are the higher price point and the need to purchase batteries and charger separately if you are not already in the Stihl AK ecosystem. The Stihl SE 31 is best suited for professionals or homeowners who prioritize cordless convenience and already own Stihl tools.

Suction Power and Performance: Corded vs Battery

The Greenworks 12-Amp corded vacuum has a clear advantage in raw suction power. With 200 CFM of airflow and 70 inches of water lift, it can handle heavy debris like wood chips, gravel, and large liquid spills more effectively. The constant power from a wall outlet means no runtime limitations, making it ideal for extended cleanup sessions in a workshop or garage.

The Stihl SE 31, while less powerful on paper, still delivers respectable performance for a battery-powered vacuum. Its 130 CFM and 60 inches of water lift are sufficient for typical workshop debris, sawdust, and wet spills. The real advantage of the Stihl is its portability. You can take it to areas without power outlets, such as a driveway, yard, or remote job site. The blower function adds versatility for clearing leaves or sawdust from hard-to-reach areas.

For most users, the Greenworks will be the better performer for heavy-duty cleaning. However, if you prioritize cordless convenience and already own Stihl batteries, the SE 31 offers adequate power for most tasks with the added benefit of being truly portable.

Battery and Ecosystem Considerations

This is where the choice becomes more strategic. The Greenworks wet dry vacuum is corded, so it does not tie into any battery system. You simply plug it in and use it. This is simpler and cheaper if you do not already own Greenworks batteries.

The Stihl SE 31 uses the Stihl AK battery platform, which is shared with Stihl's outdoor power tools like trimmers, blowers, and chainsaws. If you already own Stihl tools, buying the SE 31 as a bare tool (without batteries) can be cost-effective. If you are new to Stihl, you will need to invest in at least one AK 30 battery (36V, 4.5 Ah) and a charger, which adds significant upfront cost. Stihl batteries are known for their durability and long lifespan, but they come at a premium.

Greenworks also has a battery ecosystem, but their wet dry vacuums are corded only. If you want a battery-powered Greenworks vacuum, you would need to look at their handheld or stick vacuum lines, which are not designed for heavy wet/dry use. For a shop vacuum, Greenworks sticks with corded power.

Filtration and Dust Collection

Both vacuums handle wet and dry pickup, but their filtration systems differ. The Greenworks uses a two-filter system: a reusable foam sleeve for wet pickup and a pleated cartridge filter for dry vacuuming. The cartridge filter is washable and provides decent fine dust retention, though it is not HEPA-rated. For general workshop dust and debris, this is adequate.

The Stihl SE 31 features a flat pleated filter with a built-in cleaning mechanism. When you turn the knob, a rubber wiper cleans the filter pleats, helping maintain suction power without removing the filter. This is a significant advantage for users who vacuum fine dust regularly, as it reduces maintenance time. Stihl also offers an optional HEPA filter for users who need superior dust retention for health or regulatory reasons.

For fine dust collection, the Stihl SE 31 has the edge, especially with the optional HEPA filter. For general wet/dry use, the Greenworks filtration is sufficient and simpler to maintain.

Build Quality and Portability

Stihl is known for its professional-grade build quality, and the SE 31 reflects that. The tank is made from impact-resistant plastic with a reinforced base. The wheels are larger and more robust than those on the Greenworks, making it easier to roll over uneven surfaces. The hose is flexible even in cold temperatures, and the overall fit and finish feel premium.

The Greenworks 6-Gallon is well-built for its price point but uses lighter plastic and smaller wheels. It is still durable for home use, but it may not withstand the same level of abuse as the Stihl on a professional job site. The Greenworks is slightly heavier at 12.5 lbs compared to the Stihl's 11.7 lbs (without battery), but the Stihl becomes heavier once you add a battery pack.

For portability, the Stihl wins due to its cordless nature and better wheel design. The Greenworks is still portable but is limited by its power cord length (typically 6 feet) and smaller wheels.

What to Check Before Buying a Wet Dry Vacuum

Before choosing between Greenworks and Stihl, consider these factors:

Tank size: A 5-6 gallon tank is ideal for most home workshops. Larger tanks (8+ gallons) are better for heavy-duty use but are heavier and harder to store.

CFM vs water lift: CFM (cubic feet per minute) measures airflow for general debris pickup. Water lift (inches) measures suction strength for dense materials and liquids. Look for at least 150 CFM and 60 inches of water lift for good all-around performance.

Hose diameter: Most shop vacs use 1.25-inch or 1.5-inch hoses. Larger hoses handle bigger debris but reduce suction velocity. Greenworks uses 1.25-inch; Stihl uses 1.5-inch.

Filter type: Pleated cartridge filters are better for fine dust than foam filters. HEPA filters are best for allergy sufferers or hazardous dust.

Cord length: Corded vacs typically have 6-10 foot cords. Longer cords reduce the need for extension cords.

Mistakes to Avoid When Buying a Shop Vacuum

Ignoring filter maintenance: A clogged filter reduces suction by up to 50%. Clean or replace filters regularly, especially after wet pickup.

Buying a battery vac without checking your existing system: If you already own Stihl tools, the SE 31 makes sense. If not, a corded Greenworks is cheaper and more powerful.

Overlooking hose length: A short hose limits reach. Most vacs come with 4-6 foot hoses; longer hoses are available as accessories.

Choosing too large a tank: A 10-gallon tank is heavy when full of water (over 80 lbs). Stick to 5-6 gallons for most home use.

Forgetting the blower function: A vacuum that doubles as a blower (like the Stihl SE 31) is more versatile for outdoor cleanup.