How many fit
Only 6 of the 20 models checked meet every need here: “In one go, I wash several rooms”.
6 models fit, out of 20 checkedPicked for one job
Top pick

For several hard-floor rooms, Tineco S7 Stretch Ultra is a practical place to start, with a one-liter clean tank and a 50-minute maximum. Go with S9 Artist Pro for powered maneuvering, or Dreame Aero Pro if low furniture is the tougher requirement. No one of them guarantees a whole home on a single fill.
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Larger-tank floor washers compared by battery, water and dirty-tank limits taken one at a time, to find the useful pick for a longer hard-floor route.
By the numbers
What we found across the wet-dry floor cleaners we compare, plus the checked facts behind each finding.
Only 6 of the 20 models checked meet every need here: “In one go, I wash several rooms”.
6 models fit, out of 20 checkedHow we countedThe count uses each product's current fit ratings for “In one go, I wash several rooms”. A need with no documented match is not counted.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Tineco FLOOR ONE S7 Stretch Ultra |
|
| |
| Tineco FLOOR ONE S9 Artist Pro |
|
| |
| Dreame Aero Pro | None of these needs is a documented match |
|
Decision guide
Three limits are separate: battery life, clean water and collected water.
3 models pair at least one liter of clean water with corded power or a stated 50-minute-or-longer maximum. Across the board, 5 models carry a one-liter-or-larger clean tank. The counts come from documented fields and do not translate capacity into floor area.
Up to 75 minutes in lie-flat Auto is what S9 Artist Pro lists, against up to 50 minutes for its water supply. That 25-minute gap is why a long battery headline can still mean stopping to refill. A different issue affects the H15 Pro Heat, which gives 20 minutes in heated washing despite a 72-minute Quiet maximum.
A larger tank and hair management come with a roughly 5.1-inch body on S7 Stretch Ultra. Aero Pro’s 3.88-inch body fits a lower geometric envelope. S9 Artist Pro contributes powered maneuvering. No bigger battery will clear a blocked sofa gap or take away a dirty-tank stop.
3 options

Tineco, S7 Stretch Ultra
Lie-flat washer with a bigger tank, hair-management combs and powered assistance, aimed at longer hard-floor routes.
Top pick ifHair and sticky marks spread over several hard-floor rooms
It offers neither floor steam nor heated washing

Tineco, S9 Artist Pro
Powered lie-flat washer carrying a one-liter tank. The longest battery figure comes from one specific flat Auto-mode test and does not mean uninterrupted mopping on a single fill.
Best forLengthy hard-floor routes where powered maneuvering helps
Its maximum battery life outlasts the stated one-fill water duration

Dreame, Aero Pro
Low-profile hard-floor washer with a heated care dock. It helps when a taller lie-flat cleaner would have its body bump into the sofa.
Best forHeated roller care combined with low furniture
With a four-inch gap, there is little room to spare for uneven floors or furniture
Ready to buy
Top pick for this job

Clean-water volume
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Lengthy hard-floor routes where powered maneuvering helps
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