Sunmax RT35
#6 in 17 in and upFull review
A mid-size battery scrubber for schools, offices and retail aisles that need a few hours of cleaning per charge at an import price.
Amazon $1,999$1,999
The Sunmax RT35 is the better floor scrubber overall, rated 3.4 to 3.0. The Sunmax RT35 leads on value and recovery tank. The Viper AS4325B wins on warranty. The Sunmax RT35 costs $2,839.80 less ($1,999 vs $4,838.80).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Viper AS4325B
#9 in 17 in and upFull review
A quiet 17 in battery scrubber for offices, hospitals and stores cleaned during open hours. Its tanks are small for the price.
Amazon $4,838.80$4,838.80
Which should you buy?
- Choose the Sunmax RT35 for value ($117.59 per inch of path ($1,999, 17 in) vs $284.64 per inch of path ($4,838.80, 17 in)) and recovery tank (9.2 gal recovery tank vs 6.6 gal recovery tank).
- Choose the Viper AS4325B for warranty (5-year parts warranty vs 2-year parts warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 17 in and up floor scrubber; a clear win is highlighted. How we rank explains each one.
| Factor weight | Sunmax RT35 | Viper AS4325B |
|---|---|---|
| Overall rating | 3.4/5 | 3.0/5 |
| Value 30% | 65 $117.59 per inch of path ($1,999, 17 in) | 18 $284.64 per inch of path ($4,838.80, 17 in) |
| Cleaning path 20% | 46 17 in cleaning path | 46 17 in cleaning path |
| Recovery tank 15% | 82 9.2 gal recovery tank | 70 6.6 gal recovery tank |
| Runtime 15% | 57 2.5 h per charge | 0 battery runtime not published, scored as zero |
| Noise 5% | 50 sound level not published (neutral score used) | 53 67 dB(A) |
| Warranty 15% | 25 2-year parts warranty | 100 5-year parts warranty |
Specifications
| Sunmax RT35 | Viper AS4325B | |
|---|---|---|
| Cleaning | ||
| Cleaning path | 17 in | 17 in |
| Squeegee width | 22 in | - |
| Brush type | - | Disc |
| Brush speed | - | 140 rpm |
| Brush pressure | - | 41.8 lb |
| Maker productivity claim (not scored) | 19,000 sq ft/h | - |
| Tanks | ||
| Solution tank | 7.9 gal | 6.6 gal |
| Recovery tank | 9.2 gal | 6.6 gal |
| Power | ||
| Power | Battery | Battery (AGM) |
| Voltage | 24 V | 24 V |
| Runtime per charge | 2.5 h | - |
| Build | ||
| Noise | - | 67 dB(A) |
| Weight | 132 lb | - |
| Parts warranty | 2 years | 5 years |
| Labor warranty | - | 2 years |