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Comparisons · Robot Vacuums3 robots · checked 17 Oct 2026

Approaches compared

Robot vacuum mop docks: how do wash heat and upkeep differ?

All three docks wash the mop themselves. They differ in how hot the wash runs, how the mop is dried, how long a dust bag lasts, and what the owner still handles by hand.

Seen from the kitchen floor, a white Narwal Freo 20 rolls out of its dock in the gap at the end of the cabinets toward a dried drip trail on the tiles, the gold wash tray in its empty bay still holding the wash water.

This page checks

  1. Mop wash heatWater temperature in the dock
  2. DryingHeated air, and how hot
  3. Dock water tanksTank sizes and who fills and empties them
  4. Dust bagCapacity and days between changes
  5. Dock upkeepWhether the dock cleans itself
Narwal Freo 20

Narwal

Freo 20

IIIConditionalNot scored yet
$1,099.99list
Where to buy

Shown as out of stock in Narwal’s US store

Ecovacs Deebot T80S Omni

Ecovacs

Deebot T80S Omni

IIIConditional72Strong
No US list price
Where to buy
iRobot Roomba Max 775 Combo

iRobot

Roomba Max 775 Combo

IIIConditional77Strong
$999.99list
Where to buy

Independent review of Roomba Max 775 Combo finds solid cleaning, notable noise, little change

Full specifications19 figures on record · 16 differ
Figure
Freo 20
Deebot T80S Omni
Roomba Max 775 Combo
List price
Freo 20$1,099.99
Deebot T80S OmniNot on record
Roomba Max 775 Combo$999.99
Released
Freo 20Aug 2026
Deebot T80S OmniApr 2026
Roomba Max 775 ComboMay 2026
Dock
Freo 20Auto-empty into 2.4 L bag (up to 120 days), 140°F mop wash, 140°F hot-air dry, tank self-cleaning
Deebot T80S OmniAuto-empty (up to 90 days), hot-water mop soak up to 167°F, 145°F hot-air dry, auto solution dosing
Roomba Max 775 ComboAuto-empty, mop washing, hot-water washing
Onboard bin
Freo 20Not on record
Deebot T80S Omni220 mL
Roomba Max 775 Combo300 mL
Water tank
Freo 20Not on record
Deebot T80S Omni110 mL
Roomba Max 775 Combo180 mL
Dock dust bag
Freo 202.4 L
Deebot T80S Omni3 L
Roomba Max 775 ComboNot on record
Threshold climb
Freo 201.57 in
Deebot T80S Omni0.79 in
Roomba Max 775 Combo0.6 in
Weight
Freo 20Not on record
Deebot T80S OmniNot on record
Roomba Max 775 Combo12.8 lb
Runtime
Freo 20Not on record
Deebot T80S Omni205 min
Roomba Max 775 Combo180 min
Charge time
Freo 20Not on record
Deebot T80S Omni210 min
Roomba Max 775 Combo360 min
Battery capacity
Freo 2085 Wh
Deebot T80S Omni92 Wh
Roomba Max 775 ComboNot on record
Battery type
Freo 20Not on record
Deebot T80S OmniLi-ion
Roomba Max 775 ComboLi-ion
Suction
Freo 2031,000 Pa
Deebot T80S Omni24,800 Pa
Roomba Max 775 Combo30,000 Pa
Noise
Freo 20Not on record
Deebot T80S Omni63 dB
Roomba Max 775 ComboNot on record
Navigation
Freo 20Dual 1080p RGB cameras with AI chip (NarMind Pro, TwinAI Dodge obstacle avoidance); no LiDAR listed
Deebot T80S OmniMini-ToF navigation with structured light and RGB AI camera with supplementary light
Roomba Max 775 ComboClearView Pro LiDAR 3D mapping with PrecisionVision AI object recognition
Connectivity
Freo 20Wi-Fi
Deebot T80S OmniWi-Fi
Roomba Max 775 ComboWi-Fi, Alexa, Google Home
Size
Freo 2013.8 × 14.3 × 3.74 in
Deebot T80S Omni13.9 × 13.8 × 3.86 in
Roomba Max 775 Combo14.4 × 14.7 × 4.1 in
Mop system
Freo 20FlowWash rolling track mop, 16 nozzles, 140°F water, 12 N pressure
Deebot T80S OmniOZMO Roller 2.0, 220 RPM, TruEdge 3.0 extension, Triple Lift
Roomba Max 775 ComboNot on record
Dock dimensions
Freo 2016.97 x 15.83 x 18.15 in
Deebot T80S Omni13.31 x 18.07 x 19.69 in
Roomba Max 775 ComboNot on record
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Dock by dock

What each mop dock does for the owner

All three docks empty the dust bin into a bag, wash the mop in hot water and dry it with heated air. Wash heat runs from 167°F to 212°F and bag intervals from 90 to 120 days. Tank sizes were found only for the Ecovacs.

NarwalFreo 20
EcovacsDeebot T80S Omni
iRobotRoomba Max 775 Combo
1Mop wash waterHeat printed for the dock’s wash
Freo 20

212°F

Page says “212°F hot-water mop washing”. It also lists 140°F water sprayed on the mop.

Narwal US product page
Deebot T80S Omni

167°F

Hot water soak up to 167°F to loosen dirt.

Ecovacs US product page
Roomba Max 775 Combo

167°F

Heat washing at 167°F, with a roller that washes itself.

iRobot US product page
2DryingHeated air after the wash
Freo 20Hot-air drying

140°Fup to

“Up to 140°F hot-air drying”.

Narwal US product page
Deebot T80S OmniHot-air drying

145°F

Hot-air rolling drying; page says complete dryness in about 2 hours.

Ecovacs US product page
Roomba Max 775 ComboHeated drying

122°F

Page says it heat-washes and dries at 122°F.

iRobot US product page
3Dock water tanksClean tank and dirty tank, as printed
Freo 20

Not found

Page says the dock refills the clean-water tank and collects dirty water in a wastewater tank. No sizes printed.

Narwal US product page
Deebot T80S Omni

4 L / 2.2 Lclean / dirty

Station table lists both tank sizes, plus auto refill and drain.

Ecovacs US product page
Roomba Max 775 Combo

Not found

Owner fills and empties

No tank sizes on the maker page. A hands-on review describes separate tanks the owner refills and empties.

Hands-on review, 2026

4Dust bag in the dockSize and the maker’s change interval
Freo 20

2.4 Lup to 120 days

Page says up to 120 days of hands-free dust collection.

Narwal US product page
Deebot T80S Omni

3 Lup to 90 days

Page says the dustbin empties itself for up to 90 days.

Ecovacs US product page
Roomba Max 775 Combo

3 monthsper bag

Bag size not found. Page says bags keep homes fresh for 3 months.

iRobot US product page
5Does the dock clean itselfUpkeep after the mop is washed
Freo 20Tank self-cleans

Page lists active water tank self-cleaning.

Narwal US product page
Deebot T80S OmniStation self-cleans

Page says the station cleans itself with a scraping arm, with a washing tray rated 150 days.

Ecovacs US product page
Roomba Max 775 ComboOwner rinses tanks

Page tells owners to rinse the dock water tanks and change the filter every 3 to 6 months.

iRobot US product page
6Dock sizeAs printed, with its base or ramp
Freo 20

17.0 × 15.8 × 18.1in

Base station size as listed.

Narwal US product page
Deebot T80S Omni

13.3 × 18.1 × 19.7in

Width, depth, height with base. Printed in mm.

Ecovacs US product page
Roomba Max 775 Combo

17.7 × 16.7 × 17in

Length, width, height. Dock weight 18.96 lb.

iRobot US product page

Same on all three: the dock empties the robot’s dust bin into a bag and the mop is washed with hot water.

In the bathroom a Roomba Max 775 Combo sits docked with its dock's lid up and both tank wells empty, while its clean tank fills under the bath tap and its dirty tank stands open beside the drain.

Your home

How each one fits a home like yours

Set the conditions that describe your home. Each robot answers from its own Fit Check; nothing is scored until you choose.

Fit check

Describe your home

Pick what applies. Each robot answers from its own record.

Mopping needs
Upkeep you accept
Primary floors
Across what you setEach robot’s own Fit Check
Freo 20Set a condition
Deebot T80S OmniSet a condition
Roomba Max 775 ComboSet a condition
Mopping needsNot set
Freo 20Not set
Deebot T80S OmniNot set
Roomba Max 775 ComboNot set
Upkeep you acceptNot set
Freo 20Not set
Deebot T80S OmniNot set
Roomba Max 775 ComboNot set
Primary floorsNot set
Freo 20Not set
Deebot T80S OmniNot set
Roomba Max 775 ComboNot set

Everything else

Where they land among 259 robot vacuums

Only the measures on which these three differ. The bar is the whole category; the block is the typical middle half; the tick is the median.

HeightClearance under furniture
Freo 20

3.7 in
Deebot T80S Omni

3.9 in
Roomba Max 775 Combo

4.1 in

2.6typical 3.6–4 · median 3.87.8

Sources

Where every figure comes from

  • Freo 20 · Narwal US product page; launch news coverage, Aug 2026
  • Deebot T80S Omni · Ecovacs US product and shop pages
  • Roomba Max 775 Combo · iRobot US product page; hands-on review (Gizmodo, 2026)

Dock figures are quoted from each maker’s US page as read on 2 Oct 2026. Where a maker page could not be opened, the source is marked as a retailer listing.

Questions

What readers ask

Does every dock here wash the mop automatically?

Each listing opened describes hot-water mop washing and heated drying in the dock. The Roomba’s dock also relies on tanks that a hands-on review says the owner fills and empties.

How long does a dust bag last?

Makers claim up to 90 days for the Ecovacs and 120 for the Narwal. iRobot says 3 months per bag for the Roomba.

Can I buy these in the US today?

Ecovacs and iRobot list theirs for sale. Narwal’s US page shows the Freo 20 as out of stock.

Common questions

What readers ask about this comparison.

Next up

Ecovacs Deebot T80S Omni vs MOVA E50 Pro Ultra: how they differ

Read the comparison
Comparison ID: RV–CMP–12210 · Last reviewed Sep 28, 2026 · Based on owner reports, manufacturer documentation, and firmware release notes

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