Cleaning width, tank capacity, battery voltage, brush motor power. The numbers on a spec sheet tell a story — if you know how to read them.
A floor scrubber spec sheet is a list of numbers that look straightforward until you try to compare two machines. One has 530mm cleaning width. Another has 21 inches. One claims 2,200 m²/h coverage. Another says 23,000 ft²/h. The same machine measured in different units. The difference between a machine that works for your facility and one that disappoints is often hidden in the specs you did not look at closely enough.
This guide walks through every major specification on a floor scrubber spec sheet and explains what it actually means for your daily operation. By the time you finish reading, you will be able to look at any spec sheet and know whether the machine fits your facility, your staff, and your cleaning schedule.
Key Takeaway: The five specs that matter most are: (1) cleaning width, which determines how fast you cover the floor, (2) tank capacity, which determines how long you can run between refills, (3) battery voltage and amp-hours, which determines runtime, (4) brush motor power, which determines cleaning effectiveness on tough soil, and (5) squeegee width, which must match or exceed the cleaning width for effective water recovery. Ignore marketing coverage numbers. Calculate real-world coverage at 60-70% of the theoretical maximum.
What it is: The width of the brush or pad deck that contacts the floor, usually measured in inches or millimeters.
Why it matters: Cleaning width is the single biggest factor in how fast a machine covers a floor. A wider machine takes fewer passes to clean the same area. But wider machines are also larger, heavier, and harder to maneuver in tight spaces. The trade-off between speed and maneuverability is the most common decision point in choosing a floor scrubber.
How to read it: Common sizes are 17" (compact walk-behind), 21" (standard walk-behind), 28-34" (ride-on or wide walk-behind), and 36-42" (large ride-on). For reference, a 17" machine is about as wide as a standard office chair. A 34" machine is about as wide as a typical warehouse pallet.
Real-world coverage: Manufacturers advertise theoretical coverage in square feet per hour, calculated by multiplying cleaning width by travel speed. Real-world coverage is about 60-70% of the theoretical number due to obstacles, overlap between passes, and travel time between zones. A machine that claims 20,000 ft²/h will cover roughly 12,000-14,000 ft²/h in practice.
| Cleaning Width | Theoretical Coverage | Real-World Coverage | Time for 10,000 ft² |
|---|---|---|---|
| 17" (430 mm) | ~9,000 ft²/h | ~5,400-6,300 ft²/h | ~1.6-1.9 hours |
| 21" (530 mm) | ~12,000 ft²/h | ~7,200-8,400 ft²/h | ~1.2-1.4 hours |
| 34" (860 mm) | ~24,000 ft²/h | ~14,400-16,800 ft²/h | ~0.6-0.7 hours |
| 40" (1,015 mm) | ~30,000 ft²/h | ~18,000-21,000 ft²/h | ~0.5 hours |
What it is: The width of the rear squeegee that vacuums up the dirty water after the brush passes. Measured in the same units as cleaning width.
Why it matters: The squeegee must be wider than the cleaning path. If the squeegee is narrower than the brush, the machine will leave a trail of dirty water on each side of the cleaning path. A good rule of thumb: squeegee width should exceed cleaning width by at least 4-6 inches (100-150 mm).
How to read it: On the TerraScrub BA530, the cleaning width is 530mm (21") and the squeegee width is 770mm (30"). The extra 240mm (9") on each side ensures complete water recovery even when the operator makes imperfect turns or the machine drifts slightly. This is a well-proportioned setup. Some budget machines pair a 21" brush with a 24" squeegee, which leaves wet edges and requires more operator precision.
What they are: Two separate tanks. The solution tank holds clean water and cleaning chemical. The recovery tank holds the dirty water that the squeegee vacuums up. They are listed separately on spec sheets, usually in liters or gallons.
Why it matters: Tank capacity determines how long the machine can run before needing a refill and dump. A machine with small tanks requires frequent trips to the janitor closet, which eats into productive cleaning time. The solution tank and recovery tank should be roughly the same size. If the solution tank is much larger than the recovery tank, the recovery tank will fill up first and stop the machine before the solution runs out.
How to read it: A machine with 13-gallon (50L) tanks will run about 1.5-2 hours under normal use before needing a refill and dump. A machine with 40-gallon (150L) tanks runs 3-4 hours. For a single-shift operation, 13-20 gallon tanks are usually sufficient. For multi-shift or large facilities, 40+ gallon tanks reduce the number of refill stops.
Real-world tip: Recovery tank capacity is the number that matters most. When the recovery tank fills up, the machine stops cleaning. Most machines have a float shut-off that stops the vacuum when the recovery tank is full. The solution tank can be refilled in 2 minutes. The recovery tank takes 5-10 minutes to empty, rinse, and refill because it needs to be cleaned out.
What they are: Voltage (V) determines the power available to the motors. Amp-hours (Ah) determines the total energy stored, which translates to runtime. Common configurations are 24V/100Ah, 24V/200Ah, 36V/200Ah, and 48V/100Ah+.
Why it matters: Higher voltage means more power for the traction motor to climb ramps and more torque for the brush motor to remove tough soil. Higher amp-hours means longer runtime between charges. A 24V/100Ah battery in a walk-behind scrubber typically runs 2-3 hours. A 24V/200Ah battery in a ride-on runs 4-6 hours. A 36V or 48V system is used for larger machines that need more power to drive the machine and run multiple brush motors.
How to read it: Multiply voltage by amp-hours to get watt-hours (Wh), which is the total energy capacity. A 24V/100Ah battery is 2,400 Wh. A 36V/200Ah battery is 7,200 Wh. Higher Wh means longer runtime, but also heavier batteries and longer charge times. Lead-acid batteries take 8-10 hours to charge fully. Lithium batteries take 2-4 hours.
| Configuration | Energy (Wh) | Typical Runtime | Charge Time | Weight |
|---|---|---|---|---|
| 24V/100Ah lead-acid | 2,400 Wh | 2-3 hours | 8-10 hours | ~65 kg |
| 24V/100Ah lithium | 2,400 Wh | 2.5-3.5 hours | 2-3 hours | ~25 kg |
| 24V/200Ah lead-acid | 4,800 Wh | 4-6 hours | 10-12 hours | ~130 kg |
| 48V/155Ah lithium (BA2100) | 7,440 Wh | 6-8 hours | 3-4 hours | ~55 kg |
Temperature effect: Battery capacity drops in cold temperatures. Lead-acid batteries lose 30-50% of their rated capacity at 32°F and up to 60-70% at -10°F. Lithium batteries retain 80-90% at -10°F. If your facility operates in cold conditions, battery chemistry matters more than the Ah rating on the spec sheet. According to Battery University data, lithium iron phosphate (LiFePO4) batteries maintain the most consistent performance across temperature ranges and deliver 3,000-5,000 charge cycles vs 500-1,000 for lead-acid.
What it is: The power of the motor that spins the brush or pad, measured in watts (W) or horsepower (HP).
Why it matters: Brush motor power determines how well the machine removes soil. A weak motor bogs down on greasy quarry tile or rough concrete. A powerful motor maintains consistent brush speed even under heavy soil load. Walk-behind scrubbers typically have 500-700W single brush motors. Ride-on machines with dual brushes (two motors, one per brush) often have 500-700W per brush, for a total of 1,000-1,400W.
How to read it: For daily cleaning of sealed floors with light to moderate soil, 500-600W is adequate. For heavy soil, greasy environments (kitchens, manufacturing), or rough quarry tile, 650W+ per brush is recommended. If the spec sheet lists brush motor power in HP, multiply by 746 to convert to watts. A 0.75 HP brush motor is about 560W.
What it is: The motor that moves the machine forward. Walk-behinds may or may not have a traction motor. Ride-ons always have one. Measured in watts or horsepower.
Why it matters: A more powerful traction motor handles steeper slopes and heavier machines. A walk-behind without traction drive requires the operator to push the machine, which causes fatigue on long shifts. Walk-behinds with traction (marked as "D" models like A3D or BA690BT) have a small 200-400W motor that takes the effort out of pushing. Ride-ons need enough power to climb ramps and loading dock inclines. A 500W traction motor is adequate for flat floors. An 800W motor handles ramps up to 15% grade.
What it is: The weight of the machine with the battery installed but without water in the tanks. Usually listed in kilograms and pounds.
Why it matters: Weight affects floor pressure (how hard the brush presses into the floor), maneuverability (heavier machines are harder to push without traction), and floor loading (some elevated mezzanines and multi-story structures have weight limits). A heavier machine generally cleans better because the brush has more contact pressure. But too much weight makes the machine hard to transport between floors and can damage certain floor surfaces.
How to read it: Walk-behinds typically weigh 100-170 kg (220-375 lb). Compact ride-ons are 200-250 kg (440-550 lb). Large ride-ons range from 300-700 kg (660-1,540 lb) depending on battery size and frame construction. For elevator transport, add the weight of the operator and any equipment carried on the same trip, and keep the total under the elevator's rated capacity.
What it is: The physical footprint of the machine, usually in millimeters or inches. Length includes the squeegee assembly. Width includes the brush deck. Height includes the control panel or overhead guard.
Why it matters: Dimensions determine whether the machine fits through doorways, in elevators, and down narrow aisles. A machine that looks great on paper but does not fit through the door is useless. Measure every doorway, elevator, and aisle the machine needs to pass through. Account for the fact that the machine needs a few inches of clearance on each side for the operator to steer effectively.
How to read it: Standard doorway width in commercial buildings is 36" (91 cm). A machine wider than 24" has limited clearance in hallways and doorways. A machine wider than 30" will not fit through most standard doors. For elevators, check both the door width and the interior depth. Some machines fit through the door but are too long to turn around inside the elevator.
What it is: The sound pressure level produced by the machine during normal operation, measured in decibels (dB). Usually listed at a standard distance of 1 meter from the operator's ear.
Why it matters: Noise determines when and where the machine can be used. A machine running at 70+ dB in a hospital corridor or office building during occupied hours generates complaints. A machine running at 60-65 dB can be used in noise-sensitive environments without disrupting patients, residents, or office workers.
How to read it: OSHA requires hearing protection for sustained exposure above 85 dB. For reference: 60 dB is normal conversation, 70 dB is a vacuum cleaner, 80 dB is heavy traffic. Walk-behind scrubbers typically run at 62-68 dB. Ride-on scrubbers are 68-75 dB. Sweepers are in a similar range. If the spec sheet does not list a noise level, ask for it. Many manufacturers avoid publishing noise data because their machines are louder than the competition.
What it is: The theoretical area the machine can clean in one hour, calculated from cleaning width and travel speed. Usually listed in square meters per hour or square feet per hour.
Why it matters: Coverage rate determines whether the machine can clean your facility within your available cleaning window. If you have 4 hours overnight to clean a 50,000 sq ft warehouse, you need a machine that can cover at least 12,500 sq ft per hour in real-world conditions. That means looking for a theoretical coverage of 18,000+ ft²/h.
How to read it with skepticism: Manufacturers often list the maximum theoretical coverage, which assumes a perfectly straight cleaning path with no obstacles, no overlap, no turns, and no time for refilling tanks or emptying the recovery tank. Real-world coverage is typically 60-70% of the theoretical number. A machine claiming 20,000 ft²/h will actually cover about 12,000-14,000 ft²/h in a real facility. When comparing machines, compare real-world estimates, not theoretical maximums.
| Spec | Walk-Behind (A3/A3D) | Small Ride-On (A5) | Mid Ride-On (A7) |
|---|---|---|---|
| Cleaning width | 21" (530 mm) | 21" (530 mm) | 34" (860 mm) |
| Squeegee width | 30" (770 mm) | 30" (770 mm) | 43" (1,100 mm) |
| Tank capacity | 50-55L / 55-65L | 65L / 75L | 140L / 150L |
| Battery | 24V/100Ah | 24V/100Ah | 24V/200Ah |
| Brush motor | 550W | 560W | 560W × 2 |
| Traction motor | None (A3) / 200W (A3D) | 500W | 800W |
| Weight | 155-165 kg | 220 kg | 330 kg |
| Dimensions (cm) | 127×55×109 | 126×62×103 | 165×90×130 |
| Real-world coverage | ~5,000-6,000 ft²/h | ~6,000-7,000 ft²/h | ~12,000-15,000 ft²/h |
Square meters per hour. It measures the theoretical area the machine can clean in one hour. To convert to square feet per hour, multiply by 10.76. A machine rated at 2,200 m²/h covers about 23,700 ft²/h theoretically. Real-world coverage is about 60-70% of that.
Not exactly. Higher voltage provides more power for traction and brush motors, which helps on slopes and heavy soil. But higher voltage also means heavier batteries and a more expensive electrical system. For most walk-behind applications, 24V is sufficient. For large ride-on machines, 36V or 48V provides better performance. Match voltage to the machine size and facility requirements.
For walk-behinds cleaning sealed floors with light to moderate soil, 500-600W is adequate. For heavy soil, greasy environments, or rough surfaces, 650W+ per brush is better. Dual-brush ride-ons with 500-700W per brush provide excellent cleaning power and the ability to handle uneven floors.
A rough guide: 10-15 gallon tanks for facilities under 15,000 sq ft (1.5-2 hours runtime), 15-25 gallon tanks for 15,000-40,000 sq ft (2-3 hours), 25-50+ gallon tanks for 40,000+ sq ft (3-4+ hours). The recovery tank must be at least as large as the solution tank.
If your operator is cleaning for more than 2 hours per shift or covering more than 20,000 sq ft per day, yes. A traction motor reduces operator fatigue significantly. If the machine is used for short cleaning runs (under 1 hour) in a small facility, a manual push model may be sufficient and costs less up front.
Still trying to decode a spec sheet? Donnie at TerraScrub can help you compare machines and understand what each spec means for your specific facility. Whether you are looking at a TerraScrub model or a competitor's machine, he will give you an honest assessment of what you need. Reach Donnie at Donnie@terrascrubx.com or on WhatsApp.
Contact Donnie for confidential pricing, spec sheets, and distributor partnership details.
