Home Robot Vacuum Cleaners Irobot Roomba Combo Essential Vs. Irobot Roomba 621

Irobot Roomba Combo Essential Vs. Irobot Roomba 621 Review

8 minute read   Last updated on Apr 21, 2024
iRobot Roomba Combo Essential

iRobot Roomba Combo Essential

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Key features of the iRobot Roomba Combo Essential

Overall Score 6.4

  • Can Clean All Floor Types
  • Battery Power of 1800 mAh
VS
iRobot Roomba 621

iRobot Roomba 621

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Key features of the iRobot Roomba 621

Overall Score 6.4

  • Can Clean All Floor Types
  • Has Included Washable Filters
  • Battery Power of 4500 mAh

A summary by feature comparison

Category Features iRobot Roomba Combo Essential iRobot Roomba 621
COMMONLY ASKED FOR FEATURES can clean all floor types
has mapping and navigation
has an obstacle sensor
works with alexa
compatible with google assistant
number of cleaning modes 2only 3only
warranty period 1year 1year
DESIGN FEATURES has included washable filters
dustbin capacity 0.4L 0.5L
automatically adjusts its height
weight 2.8kg 4.3kg
width 330mm 340mm
height 80mm 92mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 1,800mAh 4,500mAh
operating time 1.2h 1.5h
charge time 2h 3h
operating power consumption 33W 33W
has overheating indicator
has auto-off
can mop floor
has dirt sensor
OTHER FEATURES has problem area cleaning
has carpet detection
support a mobile application
doesn't get stuck
supports virtual barriers
has route mapping
has voice prompts
supports auto docking
has anti-fall sensor
can be scheduled
supports wi-fi
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Let's look at each feature category in detail

Commonly Asked For Features

Can Clean All Floor Types

iRobot Roomba Combo Essential cleans all floor types, this feature comes in handy, as different rooms within a home may have various types of flooring i.e. carpets. If a robot vacuum is advertised able to clean all floor types, it means that the vacuum is capable to effectively clean a wide range of flooring materials without much significant issues.

iRobot Roomba 621 can also clean all floor types, this means that it too is designed to be adaptable, giving best cleaning results on either hard floors or carpets found in most homes.

Has Mapping And Navigation

The vacuum's ability to generate a digital map of its cleaning area is one of the commonly asked-for features. The map it creates allows the robot to "understand" the layout of the desired space. This can be used for several purposes, e.g. the iRobot Roomba 621 having the mapping feature can dedicate efficient cleaning in the mapped-out areas keeping out of those that are not.

Has An Obstacle Sensor

iRobot Roomba Combo Essential has an obstacle sensor, such a sensor serves the purpose of detecting and identifying obstacles in the robot's path, allowing it to navigate around them and avoid collisions.

Also, the iRobot Roomba 621 has an obstacle sensor, obstacle sensors work together to provide the robot vacuum with a better understanding of its environment, enabling it to navigate around furniture, walls, and other objects when cleaning a room and preventing damage to both the robot and its obstacles.

Works With Alexa

Most modern robot vacuum cleaners such as the iRobot Roomba Combo Essential are built to work with Amazon Alexa, which means that they can be integrated with the Amazon Echo ecosystem and controlled using voice commands.

Compatible With Google Assistant

The iRobot Roomba Combo Essential is compatible with Google Assistant, enabling you to control it using voice commands through Google Home devices or the Google Assistant app installed on smartphones and tablets.

Number Of Cleaning Modes

iRobot Roomba Combo Essential has 2 cleaning modes, the cleaning modes offered by robot vacuum cleaners varies depending on the make and model of the robot vacuum.

The iRobot Roomba 621, having only 3 has more modes than the iRobot Roomba Combo Essential by 1 Robot vacuum manufacturers may offer different cleaning modes to provide users with flexibility and adaptability to different cleaning scenarios.

Warranty Period

The iRobot Roomba Combo Essential has a period of 1 year, warranty periods for robot vacuums typically range from 1 - 2 years, but some higher-end brands may give longer warranty periods.

iRobot Roomba 621, at 1 year has the same warranty period as that of iRobot Roomba Combo Essential. When considering a robot vacuum cleaner, it's important to read and understand the warranty terms and conditions, alongside any limitations or exclusions that may apply.

iRobot Roomba Combo Essential
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Design Features

Has Included Washable Filters

The iRobot Roomba 621 has washable filters, these are designed to capture dust, dirt, and fine particles during the cleaning process and can be easily removed and washed to keep up the vacuum's performance.

Dustbin Capacity

iRobot Roomba Combo Essential's dustbin capacity is at 0.4L, dustbin capacity determines how much dust, debris, and pet hair the vacuum holds before it can be emptied.

The iRobot Roomba 621, at 0.5L has more capacity than the iRobot Roomba Combo Essential with a difference of 0.1L The dustbin capacity varies widely among robot vacuum models, and the capcity you choose should be based on your cleaning needs and the size of the area you want to clean.

Automatically Adjusts Its Height

Different floor types require a robot vacuum to be at a given ground clearance so as to optimize performance. iRobot Roomba 621 adjusts its height to match this requirement, for example, it may raise itself slightly when transitioning to a carpet to allow for effective suction, and then lower itself on hard floors to ensure the brushes make good contact.

Weight

The iRobot Roomba Combo Essential weighs 2.8kg, robot vacuums are commonly designed to be lightweight and compact to easily get around and carrying around.

The iRobot Roomba 621, at 4.3kg weighs more than the iRobot Roomba Combo Essential with a difference of 1.5kg. It's advisable to take in consideration the weight of the robot vacuum when getting a model, especially if you plan to carry it up and down stairs

Width

iRobot Roomba Combo Essential has a width of 330mm, often referred to as its cleaning path width, is the width of the area that it can properly clean in one go. The width of a robot vacuum is important as it can affect its efficiency and the duration it takes to clean a room

iRobot Roomba 621, at 340mm measures more in width than the iRobot Roomba Combo Essential with a difference of 10mm. A wider cleaning path can cover more ground in a single pass, shortening the time it takes to clean a room.

Height

iRobot Roomba Combo Essential's height measures 80mm, here you are considering the measurement from the bottom of the robot vacuum to its highest point. Height is a key consideration, especially if you have furniture with limited clearance in your home.

The iRobot Roomba 621, at 92mm measures more in height than the iRobot Roomba Combo Essential by 12mm. When choosing a robot vacuum, ensure that the robot vacuum can go under the furniture and navigate effectively in your living space without getting stuck or causing damage.

Cleaning Performance And Power Features

Battery Power

The battery power of a robot vacuum cleaner is important as it determines how long the vacuum can run on a single charge. Battery capacity is measured in milliampere-hours (mAh), iRobot Roomba Combo Essential's battery power is 1,800mAh

The iRobot Roomba 621, at mAh4,500 has more battery power than the iRobot Roomba Combo Essential by A bigger capacity implies longer battery life which can be of advantage if you have a large space or if you would like the robot vacuum to complete cleaning cycles without frequent interruptions to recharge.

Operating Time

The operating time of a robot vacuum cleaner refers to the time the vacuum can clean continuously on a single charge before it needs to be recharged. iRobot Roomba Combo Essential's operating time is 1.2h

iRobot Roomba 621, at 1.5h lasts more than the iRobot Roomba Combo Essential with a difference of 0.3h Always plan cleaning cycles around the vacuum's operating time to maximize efficiency and prevent "incomplete work" between charge intervals.

Charge Time

iRobot Roomba Combo Essential has a charge time of 2h, the charge time of a robot vacuum cleaner refers to the amount of time it takes for the vacuum's battery to recharge fully after it has been depleted during a cleaning cycle.

The iRobot Roomba 621, at 3h charges for longer than the iRobot Roomba Combo Essential by 1h. Charge time is an important factor to consider when choosing a robot vacuum, as it determines how long you'll need to wait before the vacuum begins its next cleaning cycle.

Operating Power Consumption

The operating power consumption of a robot vacuum cleaner refers to the amount of electrical power the vacuum uses while it's actively cleaning your home. iRobot Roomba Combo Essential has a power consumption of 33W, power is measured in watts (W) and changes among different robot vacuum models based on several consuption factors.

iRobot Roomba 621, at 33W has the same power consumption as that of iRobot Roomba Combo Essential. Lower power consumption is more energy-efficient and cost-effective over time, but it may also affect cleaning performance, especially on carpets.

Has Overheating Indicator

An overheating indicator in a robot vacuum serves many key purposes, making it a valuable safety feature. It helps protect the iRobot Roomba 621 from damage by detecting when critical components, such as the motor or battery, are operating at temperatures that are dangerous.

Has Auto-Off

This feature is designed to automatically turn off the vacuum after it has completed a cleaning cycle or when specific conditions occur. iRobot Roomba Combo Essential has an auto-off feature, which is useful for energy efficiency and battery preservation.

Also, iRobot Roomba 621 has this feature, overall, the auto-off feature in a robot vacuum is a key addition that in a way promotes energy efficiency, prolongs the vacuum's lifespan, enhances safety, and adds convenience to the cleaning process.

Can Mop Floor

True, most modern robot vacuum cleaners can mop floors in addition to vacuuming. These robot vacuums are often referred to as robot vacuum with mopping function models and iRobot Roomba Combo Essential is one of those robot vacuums

Has Dirt Sensor

iRobot Roomba Combo Essential has a dirt sensor, dirt sensors are designed to detect the availability of dirt, dust, or debris in the area being cleaned and can be used to adjust the vacuum's cleaning behavior during operation.

You may want to consider buying either the iRobot Roomba 621 or iRobot Roomba Combo Essential If you prefer the ability to automatically adjust the cleaning modes of the robot vacuum based on the level of dirt and debris in your space.

iRobot Roomba Combo Essential
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Other Features

Has Problem Area Cleaning

Problem area cleaning enables you to command a robot vacuum to focus on cleaning a specific spot in your space, the iRobot Roomba 621 supports this, which can be particularly useful for addressing localized messes or high-traffic areas.

Has Carpet Detection

iRobot Roomba 621 has carpet detection, which allows the vacuum to detect and adapt to all kinds of floor surfaces, to be specific recognizing when it moves from hard floors like tile to carpeted areas.

Support A Mobile Application

iRobot Roomba Combo Essential supports a smartphone app, through which you can control and monitor the vacuum remotely through your smartphone or tablet.

Doesn't Get Stuck

This feature in robot vacuum cleaners is designed to eliminate the chance of the robot vacuum becoming stuck while cleaning. Robot vacuums such as the iRobot Roomba Combo Essential are equipped with various sensors and technologies to move around obstacles and avoid getting trapped, but the effectiveness of this feature varies among different models.

Both the iRobot Roomba 621 and iRobot Roomba Combo Essential have the "anti-stuck" feature, but clearing clutter, ensuring proper cable management, and creating clear paths for the vacuums helps to further eliminate the chances of becoming stuck during cleaning.

Supports Virtual Barriers

These virtual barriers are set up and controlled through the robot vacuum's mobile app, similar to no-go zones, these barriers are setup to help you control and restrict where the robot vacuum can and cannot go during cleaning.

Has Route Mapping

iRobot Roomba 621 has a route mapping feature that enables it to create a map of your space and plan efficient cleaning routes. This mapping capability improves the vacuum's ability to work effectively and systematically.

Has Voice Prompts

Voice prompts refer to audible messages that the vacuum emits to give you alerts on the different states of the vacuum. iRobot Roomba Combo Essential has this feature

Supports Auto Docking

Auto-docking is a feature that refers to the vacuum's ability to return to its docking station when certain conditions are met such as getting work done, battery running low, or any malfunction.

Both iRobot Roomba 621 and iRobot Roomba Combo Essential support this feature, considered a convenient feature because it makes sure that the robot vacuum maintains its charge and readiness for cleaning with little or no manual intervention.

Has Anti-Fall Sensor

Most robot vacuum cleaners such as iRobot Roomba Combo Essential come equipped with an "cliff detection" feature. This feature is intended to save the robot vacuum from falling off stairs, ledges, or other elevated surfaces, hence its safety during operation.

This safety feature that is also available on the iRobot Roomba 621 is key in avoiding accidents and keeping the robot vacuum from damage. It gives you peace of mind knowing that the vacuum will not fall off a ledge during its cleaning cycle.

Can Be Scheduled

iRobot Roomba Combo Essential has this convenient feature, which allows you to set certain days or times of day for the robot vacuum to start cleaning your space.

The scheduling feature in robot vacuums is particularly useful in keeping a consistently clean home with little or no manual intervention. iRobot Roomba 621 too can be scheduled.

Supports Wi-Fi

iRobot Roomba Combo Essential supports Wi-Fi, Wi-Fi-enabled robot vacuums offer several advantages and features, such as remote control, mobile app integration, voice assistant compatibility, and remote monitoring.

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