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iRobot Roomba Plus 678 Combo

No test site has tested it yet, so it is not in our ranking.

iRobot Roomba Plus 678 Combo (black)Not ranked
$899
Amazon.com
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Is the iRobot Roomba Plus 678 Combo right for your home? Find out in 7 questions →

About this model

Wide and shallow: that is the station the iRobot Roomba Plus 675 Combo comes with. Along the wall it runs 19.1 inches, 3.5 inches beyond what its peers take, and into the room only 13.8 inches, where docks that also wash the mop tend to need 17.7 inches. It wants close on 19.7 inches of bare wall.

Learn more →

Who it suits

Good for

  • Rugs and carpet: lifts the mop 0.4 in (10 mm)
  • Pets: anti-tangle brush
  • Mopping: station washes and dries the mop
  • Upkeep: all-in-one station
  • Clutter on the floor: AI camera recognizes obstacles

Not for

  • Low furniture: 3.9 in (10 cm) tall

From the facts the maker states, by the rules of our advisor.

On this page

  1. Overview$899 today
  2. Stores2 stores, from $899
  3. Price historyLowest since we started measuring (Sep 25), no drop seen yet
  4. What to expect1 min read
  5. Specifications48 facts
  6. Questions4 questions
$899iRobot (brand store), black · including shipping Go to iRobot (brand store) ↗
iRobot Roomba Plus 678 Combo (black)

Before you buy, compare it with 2 recommended alternatives ?

Green is the best of these 3, also when they share the lead.

This model iRobot Roomba Plus 678 Combo Higher score, 11% cheaper MOVA V50 Ultra Complete Best on 3 facts Higher score, 11% pricier Roborock Qrevo Edge 3 Pro Best on 8 facts
Most important facts
Lowest price $899iRobot (brand store) $799MOVA (brand store) best $999Roborock (brand store)
Score not in our ranking 7.7 7.9 best
Customer rating – ★ 4.7 · 123 reviews –
Tests – Just A Dad Approved Vacuum Wars TechRadar Just A Dad Approved Vacuum Wars
Suction power higher is better 30,000 Pa 24,000 Pa 36,000 Pa best
Runtime per charge longer is better 210 min 200 min 256 min best
Climbs thresholds up to higher is better 1.4 in (35 mm) 1.7 in (42 mm) 1.8 in (45 mm) best
Robot height lower is better 3.9 in (10 cm) 3.5 in (9 cm) 3.1 in (8 cm) best
Mop lift on carpet higher is better 0.4 in (10 mm) 0.4 in (10.5 mm) 0.6 in (15 mm) best
Dust bag lasts longer is better up to 90 days up to 100 days best up to 65 days

Compare all 26 facts →

Prices per store

On November 14, 2026 the lowest price for the iRobot Roomba Plus 678 Combo is $899 at iRobot (brand store), shipping to the United States included.

Shipping included, sales tax added at checkout. We may earn a commission when you buy through our links. How we read and order prices

Also at Amazon, price not shown yet: Amazon.com (black).

Price historylast 30 dayslast 90 days

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Lowest since Sep 25$899
Highest since Sep 25$899
Price drops since Sep 250no drop seen yet

What you can expect from the iRobot Roomba Plus 678 Combo

Lowest price today · all stores$899
Robot height3.9 in

Wide and shallow: that is the station the iRobot Roomba Plus 675 Combo comes with. Along the wall it runs 19.1 inches, 3.5 inches beyond what its peers take, and into the room only 13.8 inches, where docks that also wash the mop tend to need 17.7 inches. It wants close on 19.7 inches of bare wall.

By iRobot's figure the robot gets over sills as high as 1.4 inches, where 0.8 inches is the ordinary limit, so a raised doorway that turns others back lets it through. Its water tank holds 150 milliliters, close to double the common 80 milliliters, so it mops longer between refills.

Based on the maker's specifications and our price data. None of our test sources has tested this model.

iRobot Roomba Plus 678 Combo specifications ?

Product on the market since September 2026 · Also sold or tested as: iRobot Roomba Plus 675 Combo (Europe) · iRobot Roomba Plus 678X Combo (United States) source

Manual (PDF)
Climbs thresholds up to1.4 in
Mop lift on carpet0.4 in
Runtime per charge210 min
Suction power30,000 Pa

Consumables: a 2.5 l dust bag in the station, which lasts up to 90 days.

Dimensionsrobot and dock

Dock, from the front 18.7 in high 13.8 in deep 18.7 in 19.1 in wide Robot, from the side 14 in across 3.9 in

From the published dimensions. The robot passes under furniture with 4 in of clearance or more. The dock needs a spot 19.1 in wide and 13.8 in deep.

Suction and brushes 7 facts
Suction power
30,000 Pa
Anti-tangle brush
yes
Anti-tangle system
blade that cuts hair
Extending side brush
no (assumed)
Carpet detection
detects carpet and boosts suction
Suitable for pet hair
yes
Dirt detection
yes
Mopping 7 facts
Mop type
roller mop
Mop lift on carpet
0.4 in (10 mm)
Mop extends to the edges
yes
Automatic mop detach
no (assumed)
Mop refreshed while mopping
yes
Water tank in the robot
150 ml
Steam
no (assumed)
Dock 14 facts
Empties the dust bin
yes
Bagless
no (assumed)
Dust bag capacity
2.5 l
Dust bag lasts
up to 90 days
Washes the mop
yes
Wash temperature
176 °F (80 °C)
Dries the mop
yes
Hot-air drying
yes
Drying temperature
131 °F (55 °C)
Dispenses detergent
yes
Plumbing hookup
no (assumed)
Clean water tank
4 l
Dirty water tank
3.5 l
Dock size (w × d × h)
19.1 × 13.8 × 18.7 in (48.4 × 35 × 47.5 cm)
Navigation and obstacles 8 facts
Navigation
LiDAR turret
Obstacle avoidance
AI camera
Climbs thresholds up to
1.4 in (35 mm)
Climbing system for high thresholds
no (assumed)
Multi-floor maps
3
Camera on board
obstacle camera
Stair-edge sensors
yes
Robotic arm
no (assumed)
Robot 5 facts
Robot height
3.9 in (10 cm)
Robot diameter
14 in (35.5 cm)
Robot weight
10.7 lb (4.87 kg)
Dust bin in the robot
260 ml
Noise while cleaning
63 dB
Battery 2 facts
Battery capacity
6,000 mAh
Runtime per charge
210 min
Smart features and warranty 5 facts
Matter
no (assumed)
Voice assistants
Alexa, Google Assistant, Siri
Warranty
2 years
Scheduled runs
yes
Home Assistant
official integration

Where a row says “no (assumed)”, the maker's full product page for this model names the feature nowhere, so we take it as a no.

Sources: irobot.nl · irobot.com · homesupport.irobot.com · vacuumwars.com · bol.com · amazon.com · home-assistant.io

Frequently asked questions about the iRobot Roomba Plus 678 Combo

What has the iRobot Roomba Plus 678 Combo cost?

Since we began measuring on September 25, 2026, its lowest price has stayed at $899. It has not changed in that time. It was on offer on none of the 21 days we could judge: at least 5% and $10 below its usual lowest price over the 30 days before. In our other editions it costs today: Netherlands € 499 at bol.com.

Does the iRobot Roomba Plus 678 Combo wash and dry its own mop?

Yes, with water at 176 °F (80 °C). Drying is done with warm air.

Does the iRobot Roomba Plus 678 Combo work with Alexa, Google Home or Siri?

It works with Alexa, Google Assistant and Siri. Home Assistant has an official integration for this model.

Is the iRobot Roomba Plus 678 Combo suitable for pet hair?

Yes, the maker says. The brush guides hair to the side instead of winding it around the roller.

The maker

iRobot

iRobot designs and builds consumer robots, and introduced its first Roomba robot vacuum in 2002. The company was incorporated in 1990 and has its headquarters in Bedford, Massachusetts, in the United States. Since January 2026 it has been a privately held company wholly owned by Picea, which had been its primary contract manufacturer.

irobot.com

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