New Clarke Focus II Mid-Size Boost 28 Auto Scrubber
Our Take (from the SES Sales Team)
“The BOOST 28 is the Focus II Mid-Size for people who strip and refinish floors themselves. Instead of a round disc, it drives a rectangular 14 x 28-inch pad at 2,250 RPM. With a maroon prep pad, Clarke says it removes floor finish without stripping chemicals, and the square pad scrubs right into corners. Schools and medical facilities that strip in-house can save labor, chemical and odor. It is also the quietest model in the family at 63 dB A.
For daily scrubbing, BOOST runs at a low solution rate, and Clarke rates it at up to 70% less water and chemical. Choose batteries by who maintains them: 242 Ah wet if you water batteries on a schedule, sealed 312 Ah AGM if you do not. Add the chemical mixing package if you want detergent dosed from the control panel.”
A 28-inch BOOST walk-behind scrubber that also removes floor finish
The Clarke Focus II Mid-Size BOOST 28 is a battery-powered, traction-drive walk-behind automatic scrubber built on Clarke BOOST Technology. Its high-speed rectangular pad holds solution in the pad and delivers it in measured pulses, so it can deep scrub, clean into corners, wet shine the floor to reduce burnishing, and remove floor finish chemical-free with a maroon prep pad. It suits VCT, sealed concrete and other hard floors.
Choose your configuration
Compare the Focus II BOOST 28 packages
Every package shares the same 28-inch BOOST deck, 23-gallon tanks, traction drive and onboard charger. They differ only in battery type and the Chemical Mixing System.
| 242 Ah wet | 312 Ah AGM | 242 Ah wet + chemical mixing | 312 Ah AGM + chemical mixing | |
|---|---|---|---|---|
| Batteries | Four 6 V, 242 Ah wet | Four 6 V, 312 Ah AGM | Four 6 V, 242 Ah wet | Four 6 V, 312 Ah AGM |
| Battery upkeep | Regular watering | Sealed, no watering | Regular watering | Sealed, no watering |
| Chemical Mixing System | No | No | Yes, onboard | Yes, onboard |
| Best for | Teams that water batteries | No battery watering | Wet batteries plus dosing | No watering, plus dosing |
| Packages here | 05371A | 05374A | 05375A | 05378A |
Reading the model numbers: Clarke numbers this family by package. 05371A has 242 Ah wet batteries, 05374A has 312 Ah maintenance-free (AGM) batteries, and 05375A and 05378A add the onboard Chemical Mixing System. The optional Chemical Mixing System meters detergent into the solution flow, with the ounces-per-gallon setting on a knob at the control panel.
Features:
- Removes floor finish without stripping chemicals when run with a maroon prep pad
- Up to 70% less water and chemical, and up to 40% longer pad life, per Clarke
- Rectangular pad scrubs into corners, and the high-speed agitation wet shines the floor to cut burnishing
- One-touch control panel and yellow palm buttons that start forward motion, the pad motor and solution flow
- Urethane front and rear squeegee blades with a tool-free adjustment knob
Clarke Focus II Mid-Size BOOST 28
Specifications
| Models | 242 Ah wet | 312 Ah AGM | 242 Ah wet + chemical mixing | 312 Ah AGM + chemical mixing |
| Cleaning Path | 28 in (71 cm) | |||
| Pad / Brush Size | 14 x 28 in (35.6 x 71 cm) BOOST pad | |||
| Brush Motor | 3/4 hp (0.56 kW), 2,250 RPM | |||
| Brush Pressure | 65 lb (29.5 kg) / 125 lb (56.7 kg) | |||
| Squeegee Width | 35 in (89 cm) | |||
| Solution / Recovery Tank | 23 gal (87 L) / 23 gal (87 L); rear fill with bucket or hose | |||
| Solution Flow | Normal mode 0.12 gal/min (0.45 L/min); full range 0–0.65 gal/min (0–2.5 L/min) | |||
| Vacuum Motor | 0.75 hp (550 W), 3-stage tangential discharge | |||
| Speed (Forward / Reverse) | 0–260 ft/min (0–4.8 km/h) / 0–174 ft/min (0–3.2 km/h) | |||
| Batteries | 24 V, four 6 V 242 Ah wet | 24 V, four 6 V 312 Ah AGM | 24 V, four 6 V 242 Ah wet | 24 V, four 6 V 312 Ah AGM |
| Charger | Onboard, 24 V, 25 amp | |||
| Chemical Mixing System | No | No | Yes | Yes |
| Sound Level | 63 dB A | |||
| Cleaning Grade | 6° incline | |||
| Wheels | Two 10.24 in (26 cm) non-marking foam-filled; two 3.94 in (10 cm) casters | |||
| Squeegee Blades | Urethane front and rear | |||
| Dimensions (L x W x H) | 60.5 x 29 x 44 in | |||
| Agency Approval | UL 583 | |||
| Model Numbers | 05371A | 05374A | 05375A | 05378A |
Technical specs may include optional equipment that is not included with all units.

