Commercial floor cleaning machines compared

Four kinds of commercial floor cleaning machine

An auto scrubber (also sold as a scrubber dryer or industrial floor washing machine) puts down solution, scrubs, and pulls the dirty water back up through a squeegee in one pass, so the floor is dry behind it. A swing machine only scrubs. That single difference decides most of the labour on a hard-floor account.

Our own reading of the trade; no maker figures in this table

Six professional floor cleaning machines side by side

Six machines from compact to ride-on. The coverage column is each maker’s own figure and they are not the same measure: Kärcher prints a practical rate per hour, Tennant prints an “up to” estimate. Read the next section before you compare them across brands.

Kärcher BR 35/12 C Bp product page, read 2026-10-26; Nilfisk (Clarke) CA30 20B product page, read 2026-10-26; Tennant T300e product page, read 2026-10-26; Tennant T350 product page, read 2026-10-26; Kärcher B 110 R Bp + R75 + AGM product page, read 2026-10-26; Tennant T7 product page, read 2026-10-26

The Clarke page printed its 20 in path and onboard charger, but the text we could read carried no tank, coverage or run-time figures, so those cells say so rather than borrow a dealer’s number. Ask the dealer for the spec sheet.

What a coverage figure means for your bid

A theoretical rate is path width times driving speed with no turns, no refills and no furniture. Kärcher prints both numbers for its machines: the BR 35/12 at 15,069 ft²/hr theoretical and 10,500 ft²/hr practical, the B 110 R at 48,438 ft²/hr and 31,485 ft²/hr. The practical figure is 70% and 65% of the theoretical one. Tennant’s spec lists print “up to” coverage with no time unit, but the T350 page’s own copy puts that machine at more than 30,000 square feet per hour, so read them as hourly ceilings, not practical rates, and plan below them.

Kärcher BR 35/12 C Bp product page, read 2026-10-26; Kärcher B 110 R Bp + R75 + AGM product page, read 2026-10-26; Tennant T350 product page, read 2026-10-26

Worked example, our arithmetic: 20,000 sq ft of hard floor a night. At the BR 35/12’s practical rate that is about 1.9 hours, longer than its 1.5-hour battery, so you either recharge mid-shift or buy a second battery. The B 110 R does the same floor in about 38 minutes.

Machine hours go into the bid the same way cleaner hours do. Put the machine’s practical rate in place of a mop crew’s production rate for the hard-floor share of the building, then run the whole job through the commercial cleaning bid calculator.

The best commercial floor scrubber for each account

Restrooms, kitchens and small shops. A compact machine such as the Kärcher BR 35/12 C Bp, which Kärcher pitches at small shops, restaurants, gas stations and restrooms. Its 14 in brush and 3.2 gal tanks are the point: it fits where a walk-behind will not, and it goes back in the van.

Offices, schools and clinics. A walk-behind auto scrubber is the working size for corridors and classrooms. The Clarke CA30 20B runs a 20 in path; the Tennant T300e comes in 17, 20 or 24 in paths, so you can buy the narrow one for buildings full of doorways and the wide one for open lobbies.

Warehouses and big-box retail. This is where an industrial floor washer you stand on or sit on pays for itself, and it usually stays on the client’s site. The Tennant T350 stand-on keeps a 20 or 24 in path for tight aisles; the ride-ons (Kärcher B 110 R at 30 in, Tennant T7 at 26 or 32 in) carry 29 gal of solution so one fill covers far more floor. A machine that size makes sense on a contract long enough to pay it off.

Kärcher BR 35/12 C Bp product page, read 2026-10-26; Nilfisk (Clarke) CA30 20B product page, read 2026-10-26; Tennant T300e product page, read 2026-10-26; Tennant T350 product page, read 2026-10-26; Tennant T7 product page, read 2026-10-26

Noise, chemicals and daytime cleaning

If the client wants cleaning while staff are in, noise matters. Tennant lists the T350 at as low as 63.7 dBA (59.7 in quiet mode) and the T300e at as low as 67 dBA; Kärcher lists the BR 35/12 at 65 dB(A). Each maker measures its own way, so hear the machine in the client’s building before you promise day cleaning.

Tennant T350 product page, read 2026-10-26; Kärcher BR 35/12 C Bp product page, read 2026-10-26

Chemistry still applies. Tennant’s own note says its water-only ec-H2O scrubbing is not suitable for all soils, including heavy concentrations of fats and oils, so a restaurant kitchen floor still needs a degreaser. Mix the tank from the product label, and use the dilution ratio calculator to get the ounces right for the tank size.

Tennant T300e product page, read 2026-10-26

When not to buy a scrubber

If your accounts are mostly carpet, the machine you need is a vacuum, and the best vacuum for a cleaning business guide covers that choice. If the hard floor is a single small kitchen, a flat mop is faster than unloading anything. If the job is stripping and refinishing, that is swing machine work, priced as a project of its own.

The price of a scrubber is a dealer quote, not a number on the maker’s page. Ask for the machine, the batteries and charger, a year of pads and brushes, and the squeegee blades in one figure, and ask what a service visit costs before you need one.

Running a demo on your own floor

Tennant’s product pages carry a free-demo request and Kärcher’s point you to a local dealer. Use that. A demo on the showroom floor tells you nothing; a demo on your worst account at the hour your crew works it tells you everything.