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Bosch 3931A Airsweep 120-Volt 13-Gallon Wet/Dry Vacuum Cleaner with Power Broker

3.3 out of 5 stars 12 customer reviews

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  • Bosch exclusive Pulse-Clean electromagnetic filter cleaning system shakes the dual filter cartridges to remove dust and maintain maximum suction power. Pulse-Clean can be activated manually or automatically, when a connected power tool is switched off
  • Elevated filter location filters sit above maximum dust or water accumulation height to help maintain maximum airflow and suction power
  • 4 Modes of operation: regular vacuum, power tool activation, pulse-clean, pulse-clean with power tool activation
  • Activation by power tool allows power tool switch to turn vac on and off. 7-second run-on after power tool is turned off to clear hose of remaining debris
  • Power broker dial for allocating power between vacuum cleaner and connected power tool to optimize usage of the available power and avoid blown circuits. Also allows suction control for other purposes as well
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Product Description

Product Description

Stops dust and debris at the source; Shortens clean-up time; The centerpiece of the Bosch Airsweep Dust Extraction System of tools and attachments; Pulse-Clean electromagnetic filter cleaning system keeps filters clean; Captures 99.93% particles of 3 microns diameter and larger; Power Tool activation mode with 7 second run-on time to clear hose; Power-Tool Activation with Power Broker Dial for allocating power between vacuum cleaner and connected power tool. Includes 9.85-foot hose, two VAC012 filter cartridges and one VAC013 dust bag.

From the Manufacturer

Bosch power tools and accessories introduced its new power broker system and other key enhancements to the award-winning Bosch airsweep 13-Gallon wet/dry vacuum. Now, users can utilize the Bosch power broker system to avoid blown circuits and optimize overall performance by allocating the available power between the vacuum and a connected power tool, as necessary. The newly designated 3931A also encompasses the celebrated features of the previous generation 3931, including the pulse-clean electro-magnetic automatic filter cleaning system. Whether sanding or routing in the shop or concrete surface grinding or tuck pointing high on a scaffold, a power tool activated vacuum that constantly trips circuit breakers wastes time and money. For this reason, Bosch developed the new power broker system, which allows users to utilize the entire amount of available power 15-Amps on a 15-Amp circuit, 20-Amps on a 20-Amp circuit and allocate it between the vacuum and a connected power tool. Additional 3931A enhancements include new rear wheels and metal front casters with rubber tires for easy transport across all types of surfaces. And a new special stiff rubber swivel nozzle ensures a quick and snug connection to vacuum cleaner attachments, Bosch power tool dust ports and Bosch adapters for other power tools. The innovative Bosch 3931A airsweep vacuum also includes the same celebrated features of the previous generation unit. Superior suction power is derived, in part, from the large surface areas of its unique U-shape twin filters. Positioned out of the direct flow of incoming debris and above the reach of the dust or liquid that has already been vacuumed, the standard filters will capture 99.93-Percent of all particles 3.0 microns and larger in diameter. Furthermore, the 3931A has the quickest and easiest filter change system on the market, allowing users to simply open the lid and drop replacements in.

Product Information

Technical Details

Part Number 3931A-RT
Item Weight 52.4 pounds
Product Dimensions 27 x 25 x 19 inches
Item model number 3931A
Power Source corded-electric
Warranty Description 30 Day money back gaurantee, 1 year manufacturer warranty

Additional Information

ASIN B000M4MKV6
Customer Reviews
3.3 out of 5 stars 12 customer reviews

3.3 out of 5 stars
Best Sellers Rank #1,406,979 in Home Improvements (See top 100)
#1,139 in Home Improvement > Power & Hand Tools > Power Tools > Wet-Dry Vacuums
Shipping Weight 52.4 pounds
Date First Available July 2, 2004

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Tired of cheap/loud shop-vacs, narrowed my choices to the Fein Turbo III, Festool and this Bosch 3931A. After reading all reviews and specs, decided on the Bosch. This Vac is not very popular on Forums and I don't know why. The Bosch is slightly more powerful than the Fein Turbo III and also very quiet. I added the accessory basket and bought several bags. I use the 1-1/2 Mr. Nozzle Hoses, and their 1-1/2 nozzles (complete line available from Woodworker's Supply) with all my vacs so the 2-1/4" tank fitting fit the Bosch with no problems. If I could find anything negative about it is it's weight, but I use it only in my shop, so that's not a problem for me. Some will complain about the cost of the unit and its accessories (bags, etc). I don't mind the cost since I'm a hobbyist and it's worth having a vacuum that matches the quality of all my other shop tools. Determine your requirements for a vac and if they're like mine, you won't be dissatisfied with the Bosch 3931A.
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We started using the Bosch 3913A Vacuum on a large concrete resurfacing project that is on the beach here in Southern California. In the past we have had problems with our vacuums clogging up very fast because of the dust mixed with the continual moisture. The self cleaning on this vacuum works great. Our second use of this vacuum was the the removal of paint in the same environment. It worked great. The automatic self cleaning feature is a must. We found nothing negative about the vacuum.
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Verified Purchase
I looked pretty hard for a good shop vacuum (Festool, Fein, Porter-Cable and others)and I'm pleased with this unit. It is quiet enough to carry on a normal conversation with someone when it is running, which means I'm much more prone to use it than my old screamer vac. The Power Broker function works as advertises, the barrel has plenty of capacity for my needs, it accepts hoses from other vacuums, the hose it comes with is very good quality and it fits my Festool sanders, and the self-cleaning filters keep the unit functioning at peak performance. The auto on/off feature is great, but a lot of higher end vacs have this feature too. No, it doesn't come with attachments, but if you have another vacuum that your are replacing I would think you could use those hoses and attachments like I did. Lots of suction power, and it moves a lot of air. No exhaust blower, but I imagine that's how they got it so quiet. Highly recommended!
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I've been using this vac for 2 years now. I originally purchased it because I was tired of buying standard shop vacs that simply didn't hold up on the job site. Granted, I could buy 4 shop vacs compared to the cost of this, but it's not always about price. This vac is superior in many aspects. First, it's very quiet. It doesn't sound like an F-15 during takeoff like a shop vac. It also has an adjustable amperage dial that basically controls the speed of the motor and subsequently the amount of suction. No sense running at full throttle all the time if you don't need to. The power tool outlet is also another feature that's handy. You plug the tool that's connected to the vac hose. When you turn on the tool, the vac starts. It stays running about 5 seconds after the tool stops to clear the hose. I use this vac on a diamond grinder quite often and it's ability to keep up with concrete dust is amazing. The self cleaning feature really shines, keeping filters clean and suction up. Bosch also makes a HEPA filter for this vac which will be a necessity with the new EPA Lead Safe Work Practices laws that become effective in April 2010. Keep in mind that if you use the (any) vac for lead work, you have to devote that vac strictly for lead work since it will be contaminated with lead dust. Now for the nit picking. It's heavy and it's a little awkward to lift. Front wheels are pretty small. Tool end of hose doesn't stay connected very well. Despite these minor gripes, I think it's a great tool that's very well made and worth the price. It's held up remarkably well over 2 years of tough job site work. I'll be buying a couple more this March at the Bosch booth at JLC Live.
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after 6 months of use:
Well, I don't have anything but Shop Vacs to compare it to, so this may be unfair. This thing is a dream compared to those. Quiet, powerful, sturdy, etc. Everything you would expect from a near $400 vacuum. Everything down to the cord is built to last. The only reason It didn't get 5 stars is the friction fit hose end. When I use the floor kit, especially the hand piece, it comes off unless I hold onto it. I wrapped elect. tape on it to increase the friction, which seems to work. Be careful with the capacity, I practically filled a bag with sheet rock and brick and could hardly get the bag out it was so heavy. The beauty was that the bag didn't break! One minor complaint shouldn't taint your decision. It makes a good seat and step stool as well.
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I bought this as the best pick between the Fein turbo III & the Festool 33 vac. I have a commercial woodshop and needed it mainly for pick up from tools as well as general clean up. I had the Fein turbo II for 10 yrs before it gave up and can definitely reccomend it, But I was looking for larger capacity (less frequent emptying), so it was between the Fein III and the Bosch. The Festool is very nice too but seemed overpriced and awkward to empty if you don't use the bags (which are pricy, as are all their accessorys). So the Bosch was it, it's made from a softer plastic than the other two but functions very well, the filter shaker really works, and the power broker functions like the variable speed control on the festool. the hose could be longer but it does come with a rubber end that fits the Festool domino outlet perfectly. No tools but they are available seperately from any of the manufacturers, I am using the old Fein hose and tools with this vac.
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