The Bosch Profactor Leaf Blower’s Smartly Designed Throttle Makes Small Jobs Faster and Easier

4 min readIf you’re looking for a compact, lightweight handheld leaf blower that doesn’t compromise on power, the Bosch Profactor 18-volt blower, with a smart throttle design, is worth considering. I tested this model in late summer, and while there weren’t many leaves on the ground, it made quick work of grass clippings and wood chip debris I needed to clean up, as well as clearing off the patio.When I started my job, it wasn’t lost on me that just down the road, as far as three houses down, a professional landscaper was using a gas-powered leaf blower to do some similar work but with much louder results. That’s why cordless electric leaf blowers like this one from Bosch (model GBL18V-450) are growing in popularity in suburban neighborhoods. It runs more quietly than a gas model, but can still deliver great results.ProsSmall and lightweightThrottle dial is easy to use on the flyPowerful for an 18-volt blowerConsRuntime is short and may not last long enough for large jobsSmall Package With Plenty of Power for Small JobsThe first thing that struck me when I fired up this leaf blower was how powerful it was given its size. It was strong enough that my hand moved back a bit from the pressure of the airflow hitting the ground—it has a nice kick to it. I think it pushed back a bit because the main unit is small and lightweight (just over 8.5 pounds with the battery), but it's certainly nothing that you would lose control of.Our in-house tests showed an airspeed of 118 mph and an air volume of 428 (a bit lower than the factory ratings). That’s also not as high as you would find with more powerful leaf blowers with 40- or 56-volt platforms, but for an 18-volt model, that’s pretty good.I used it to clear off dry grass clippings that had collected after a recent mowing, and I was able to quickly collect them in one section of the lawn, not even using the top speed. It also worked well in clearing off a patio area that had become a bit cluttered with debris, as well as clearing away some wood chips scattered near a log splitter we’ve been using after felling a tree recently. And even after all those jobs, its lightweight design didn’t cause any fatigue.The Independent Throttle Is a Better Way to Change SpeedsOne standout feature of this leaf blower is the airspeed throttle. On other cordless leaf blowers I’ve used, the trigger acts as the throttle; the deeper you press, the more power you get. This can be a bit annoying, as your finger is bound to move as you move around, making unwanted changes in speed. A lock will let you set the trigger so you don’t have to worry about that, but then you need to fiddle with the lock every time you want to adjust the speed, and that can get tedious.The Bosch Profactor avoids that issue altogether by moving the throttle to a dial placed where your thumb rests as you hold the blower. That means you can change the speed independently of the trigger, which you can still lock if you want to keep the blower on consistently. This feature may seem minor, but I found it to be a real game changer.David DritsasMy favorite feature of this leaf blower was the speed dial at the top, which allows you to change the airflow independently of the trigger, giving you easier and more precise control while you work.It allowed me to work faster because it was easier to change speeds on the fly, and I didn’t have to focus on the pressure my finger was putting on the trigger. It also helped me avoid gunning it too hard by accident and blowing debris farther or wider than I wanted. I particularly found the precision throttling useful when I was cleaning out tight spaces in the garage; it was much easier to apply quick, controlled bursts of power.Don’t Expect a Lot of RuntimeOne notable drawback of this leaf blower is the overall runtime, even with an 8-amp-hour battery. I tested this by running it at medium speed consistently, and it stopped working after 25 minutes. Had I been using it at top speed intermittently, it probably would have been around the same. Overall, that’s less than half the amount of time I’ve seen with more powerful blowers. How each person uses a leaf blower will result in different runtimes, but I think it’s safe to say this one offers less than the competition.You could extend this, of course, with the purchase of extra batteries, or if you already have batteries from other 18-volt Bosch power tools, but if you don’t, this runtime limits the Profactor to smaller jobs. It also comes with a single-bay charger that doesn’t offer fast charging. In fact, it takes more than an hour to recharge one battery.Who Is This Leaf Blower For?Taking into consideration the medium-range air speeds and the limited runtime, this blower is best suited for smaller to medium-sized yards that only experience a small to moderate amount of leaves during the fall months. Anything more would necessitate something more powerful. That said, with its smart and lightweight design, the Bosch Profactor 18-volt leaf blower helps you get a variety of cleanup jobs around a small property done quickly, easily, and quietly.Other Editor-Recommended Leaf BlowersDavid is a Reviews Editor for Hearst’s Enthusiast Group, contributing to Popular Mechanics, Runner’s World, Bicycling, Best Products, and Biography. He has over 25 years of experience writing about and reviewing consumer electronics, kitchen appliances, DIY products, outdoor gear, and more. He also spent years covering the ever-changing world of online retail. To relax, he loves experimenting with new recipes, tweaking his smart home setup, and spending time outdoors on his bike or camping. Colin Aylesworth attended Binghamton University and is a Deputy Editor with the Gear team at Popular Mechanics and Runner’s World, where he has been since 2022. Prior to joining Hearst Magazines, he worked for 11 years at U.S. News and World Report on the autos team. His personal pursuits fit in well with the work he does for PM and RW. Aylesworth was on his college’s club rowing team and has maintained a routine running habit through most of his adult life as a means of getting exercise and spending time outdoors. Running creates a hearty appetite, which brings us to Popular Mechanics. That publication's expertise in the area of grilling is relatable to Aylesworth, who is an adherent to charcoal grilling. In fact, he’s been primarily using the same Weber charcoal kettle he bought on Craigslist in 2012. Aylesworth also has experience in the lawn mower industry. Not only has he been mowing his and neighbor’s lawns during adolescence, one of his more recent endeavors is a side gig of repairing and restoring gas lawn mowers given up by their previous owners. Since joining PM, he has gotten more involved with the publication’s mower testing efforts and especially enjoys testing out new electric and zero turn mowers.