How to Buy a Floor Scrubber (Auto Scrubber Buying Guide)

Rod Michelini is the founder of OneUp Cleaning, which sells the machines this guide describes. That gives the store a stake in what you buy, so wherever a smaller or cheaper machine is the better call, this guide says so.

To buy the right floor scrubber, match the machine to your space, not your wish list. Measure your cleanable square footage and your narrowest doorway, then choose the smallest machine that finishes the job on one tank. Under about 48,000 sq ft, a battery walk-behind usually does it. Budget for batteries, pads and squeegees on top of the price.

If that answers your question, you're free to go. If you're about to spend several thousand dollars on a commercial floor scrubber, the sections below show you where buyers most often get the decision wrong, and what it costs them afterward.

What size floor scrubber do I need?

You need the one that cleans your whole floor on a single tank and still fits through every door on the route. Start with three measurements: the square footage you actually scrub, the width of your narrowest doorway or aisle, and the distance between your storage area and the place where you'll fill and empty the tanks.

Square footage sets the class of machine. The facility management journal FMJ suggests walk-behinds for facilities under about 16,000 sq ft, larger walk-behinds with bigger tanks and batteries from there to about 48,000 sq ft, and ride-on or robotic machines above that. Here's how those bands map to the equipment you'll find on the market:

Then check the width, because the squeegee is often wider than the scrub deck. The 20-inch Powr-Flite PS460 carries a 32-inch squeegee, so measure your doorways against the squeegee assembly rather than the brush.

Now picture a school district that buys the biggest walk-behind in the catalog for its buildings. It covers the main hallway quickly, but it won't fit into the entryways, the restrooms or the smaller classrooms. Custodians on r/Custodians describe exactly this situation, from mopping the entrances by hand because the scrubber won't fit to arms giving out in rooms the machine is too big for. Oversized machines are also harder for your crew to fill, drain and store, so they get used less often than anyone anticipated. A 17 to 20 inch walk-behind that reaches every room ends up cleaning more floor in a week, and your crew stops reaching for the mop bucket.

The opposite mistake exists too. Experienced operators warn that the smallest machines put less down pressure on the floor, and that some of them aren't self-propelled. So right-size the purchase: small enough to go everywhere, heavy enough to scrub, and not simply the smallest model you can find. For the full range of formats, see the guide to the different types of floor scrubbers.

Walk-behind, stand-on or ride-on?

Walk-behind, for most facilities. It's the least expensive full-size format, it fits through standard doorways, and a single operator can run it with very little training.

Choose a stand-on when your floor is large but crowded, like a warehouse with racking or a store with long aisles, since it delivers ride-on speed in a footprint close to a walk-behind. Choose a ride-on when your floor is large and open. In our own orders, shopping malls and other wide-corridor facilities mostly pick ride-ons, while retail stores and narrow-aisle grocery stores stay with walk-behinds.

Under 5,000 sq ft? An automatic scrubber still makes sense at that size. Some of our customers clean spaces under 3,000 sq ft, and a compact floor scrubber replaces the mop without leaving a large machine to store. The trade-offs between these formats are covered in walk-behind vs ride-on floor scrubbers.

Which features actually matter?

Three features change your daily routine more than any number on the brochure: how the machine moves, what does the scrubbing, and how easily you can fill and empty it.

Self-propelled drive

It's worth paying for if the scrubber runs every day. On a brush-assist machine, the spinning brush pulls the scrubber forward while your operator pushes and steers the rest of the way, and a traction drive motor does the propelling so the operator only has to steer. Operators on r/Custodians call self-propelled machines a real convenience, and one whose new machine lacks the feature calls using it a drag.

What does the upgrade cost? On the same 20-inch Powr-Flite platform, the brush-assist PS460 sells for $3,599 and the self-propelled PS530 for $4,499, with identical tanks and scrub deck. Brush-assist still makes sense if your rooms are small and require frequent turns, where a lighter machine is easier to position.

Pads or brushes, disk or cylindrical

A disk machine is the default for most commercial floors, and it accepts both pads and brushes. A cylindrical head picks up light debris as it scrubs and reaches into grout lines and textured tile more effectively, so it earns its place on uneven surfaces. If your floor is mostly smooth sealed concrete or VCT, a disk machine is the simpler choice, and the guide to disk, cylindrical and orbital scrubber heads compares them in detail.

Tank size, hose and floor drain

Aim for a solution tank that lets you finish the job without refilling, which usually means 10 to 15 gallons for small sites and 20 gallons or more for large ones, with a recovery tank at least as large. Just as important is where you fill and dump the machine, because if the nearest floor drain or mop sink sits across the building, every refill costs you a long walk. Check the drain hose length and the size of the tank opening while you're comparing models.

Noise matters if you clean during business hours, and the 20-inch machines in our catalog list 66.5 to 70 dBA on their specification sheets. The complete checklist is in the key features of a walk-behind floor scrubber.

Choosing a scrubber for a warehouse

In a warehouse, your narrowest aisle and the length of your cleaning window eliminate more machines than your total square footage does. Measure between the racks at the tightest point on your route, then measure the open space at the end of the aisle, because the aisle end is where a rider either turns in one movement or does not. Compare that space against the machine's overall length rather than its cleaning path. The ride-on scrubbers we carry run from 55 inches long on the micro ICE RS20L to 62 inches on the 26 and 28 inch models, and a machine that cannot swing round in one pass turns every aisle change into a three-point turn, which quietly cancels the productivity advantage you paid for.

The second constraint is the clock. Most warehouses scrub overnight or in the changeover between shifts, so your machine works against a deadline that an office building never imposes. Size it on realistic coverage, which runs 30% to 50% below the spec sheet once turns and refills are counted. Check the runtime of the exact battery option you are quoted against your longest route. Tank capacity matters more here than in other buildings for the same reason, since your fill point is usually near the docks while your route runs to the back wall.

If your aisles are tight but long, a micro rider is worth a look before you give up on sitting down, since the RS20L is 24 inches wide and shorter than most full-size walk-behinds are long. The full method for warehouse floors, including sweeping, drainage and unsealed concrete, is covered in the best way to clean a warehouse floor.

Battery or cord?

Battery, for most sites. A cordless machine goes anywhere in your building, and nobody trips over a cord or stops to switch outlets halfway down a corridor. A corded scrubber like the Viper AS430C costs less at $3,015 and never runs flat, so it suits a single open floor with outlets nearby.

The battery type changes the price more than most buyers expect. On a Tornado BD 20/11L, lead acid batteries add $639.77, AGM adds $914.00 and TPPL adds $2,209.93, and the cheaper options need more maintenance and wear out sooner. The comparison of lead acid, AGM, TPPL and lithium floor scrubber batteries shows which one pays off on your cleaning schedule.

How much does an auto scrubber cost?

A new battery walk-behind or compact machine usually costs $2,500 to $6,000, and a ride-on runs well into five figures. Here's what new machines cost in our store right now:

So if your budget is $2,000 to $3,000, you're shopping for a compact machine rather than a full 20-inch walk-behind, which is perfectly fine for small floors. For a capable 20-inch walk-behind with a 10 to 15 gallon tank, one experienced operator on r/Custodians puts the budget at $5,000 to $6,000, which matches the upper half of our range.

The price tag is only your first bill. That same operator expects to replace the batteries every 3 to 4 years, along with pads and squeegee blades as they wear, and FMJ recommends judging a scrubber over 3 to 5 years, counting consumables, parts and labor instead of the upfront price alone. Whether that math works out for your facility is covered in are auto scrubbers worth the investment?

Should you buy a floor scrubber online?

Yes, and for most buyers it's the simpler route. Online, you can compare machines from several manufacturers side by side, with prices, spec sheets and manuals published up front instead of waiting on a quote. Shop here and you'll find Tornado, Powr-Flite, Clarke, Nilfisk, Viper, ICE and NaceCare in one place, so you choose the machine that fits your floor rather than choosing from a single brand's lineup.

The warranty comes from the manufacturer, not the seller. New equipment ships with the manufacturer's full warranty, backed by nationwide service through their own technicians or a partner service center near you. The one thing worth checking before you order is that the brand has parts that are easy to get, something experienced operators rate highly. If a question comes up after delivery, the floor scrubber troubleshooting guide covers the most common fixes.

Should you buy new or used?

Buy new if the scrubber will be your only one or will run most days. A used machine can work as a backup, and the guide to used vs new floor scrubbers explains when the discount is worth the risk.

Floor scrubber buying FAQ

Is a floor scrubber the same as an auto scrubber?

Usually, yes. An auto scrubber is a floor scrubber that lays down cleaning solution, scrubs, and vacuums the dirty water back up in a single pass, while a swing buffer, which some people also call a floor scrubber, doesn't recover any water.

Do I still need to sweep before scrubbing?

Yes, sweep or dust mop first unless your machine is built to sweep. Loose debris clogs your pad and gets dragged under the squeegee, which leaves streaks, and even crews who skip it in a rush say it isn't a habit worth keeping. The guide on how to use a floor scrubber covers the prep work.

How long does a floor scrubber last?

Several years, if you rinse it daily and look after the batteries. The guide to how long floor scrubbers last explains what wears out first and when replacement beats repair.

Get a second opinion before you buy

Send your square footage, floor type and cleaning frequency through the contact page, or call (855) 601-5678, and we'll suggest machines that fit your space. If what arrives isn't what you expected, the 30-day return policy covers new equipment returned in new condition.

Related reading

• What are the different types of floor scrubbers?
• Walk-behind vs ride-on floor scrubber
• Key features of a walk-behind floor scrubber
• Floor scrubber batteries compared
• Used vs new floor scrubber
• All floor scrubbers