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Why is Roomba Plus 405 (G181) Combo better that Roomba Plus 505 Combo?

Main Features parametrs

(How do we count?)
  • 1
    Cleaning Area
    1300sq. ft. (26 points) info vs 1300sq. ft. (26 points) info
  • 2
    Dustbin Capacity
    300ml (39 points) info vs 240ml (31 points) info
  • 3
    Estimated empty time
    75days (50 points) info vs 75days (50 points) info
  • 4
    Noise Level
    60dB (81 points) info vs 63dB (85 points) info
  • 5
    Suction Power
    Pa (0 points) info vs 7000Pa (32 points) info

price comparison

Product name
Price
Marketplace
Seller and Condition
Roomba Plus 405 (G181) Combo
Price
743.95$779.99$$
Marketplace
amazon
Seller and Condition
AmazonNew
line
vs
Roomba Plus 505 Combo
Price
599.99$999.99$$
Marketplace
amazon
Seller and Condition
AmazonNew
Roomba Plus 405 (G181) Combo
Price
663.34$
Marketplace
amazon
Seller and Condition
3rd PartyUsed
line
vs
Roomba Plus 505 Combo
Price
799$
Marketplace
amazon
Seller and Condition
3rd PartyUsed
Roomba Plus 405 (G181) Combo
Price
656.06$
Marketplace
amazon
Seller and Condition
3rd PartyUsed
line
vs
Roomba Plus 505 Combo
Price
587.99$
Marketplace
amazon
Seller and Condition
3rd PartyUsed
Roomba Plus 405 (G181) Combo
Price
796.99$
Marketplace
amazon
Seller and Condition
3rd PartyNew
line
vs
Roomba Plus 505 Combo
Price
799.95$
Marketplace
amazon
Seller and Condition
3rd PartyNew
Roomba Plus 405 (G181) Combo
Price
707.49$
Marketplace
amazon
Seller and Condition
3rd PartyNew
line
vs
Roomba Plus 505 Combo
Price
599.99$
Marketplace
amazon
Seller and Condition
3rd PartyNew

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Average Price per Month

The chart displays prices for each month.

Data for the chart is sourced from public sources.

Roomba Plus 405 (G181) Combo

AmazonNew
NOW! 743.95$779.99$

Roomba Plus 405 (G181) Combo

3rd PartyUsed
NOW! 663.34$

Roomba Plus 405 (G181) Combo

3rd PartyUsed
NOW! 656.06$

Roomba Plus 405 (G181) Combo

3rd PartyNew
NOW! 796.99$

Roomba Plus 405 (G181) Combo

3rd PartyNew
NOW! 707.49$
line
vs

Roomba Plus 505 Combo

AmazonNew
NOW! 599.99$999.99$

Roomba Plus 505 Combo

3rd PartyUsed
NOW! 799$

Roomba Plus 505 Combo

3rd PartyUsed
NOW! 587.99$

Roomba Plus 505 Combo

3rd PartyNew
NOW! 799.95$

Roomba Plus 505 Combo

3rd PartyNew
NOW! 599.99$

User reviews

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo

No reviews yet

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Main Features

info

Suction Power

Unknown Pa
7000 Pa
info

Cleaning Area

1300 sq. ft.
1300 sq. ft.
info

Noise Level

60 dB
63 dB
info

Dustbin Capacity

300 ml
240 ml
info

Estimated empty time

75 days
75 days
info

Dustbin Capacity (Dock)

2.5 l
2.5 l
info

Water Tank Capacity

240 ml
240 ml
info

Clean Water Tank (Dock)

4 l
4 l
info

Anti-Allergen System

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Auto Dirt Disposal

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Multi-floor Mapping

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Edge Cleaning

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Real-Time Mapping

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Scheduled Cleaning

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Self-Emptying Base

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Surface Recommendation

Hardwood, Tile, Marble, Carpet
Hardwood, Marble, Carpet
info

Voice Control

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Wet/Dry Cleaning

Dry, Wet, Wet/Dry
Dry, Wet, Wet/Dry
info

Type of charging station

Self-Cleaning Station, Mop Cleaning Station
Self-Cleaning Station
info

Brand

iRobot
iRobot
info

Dirt Water Tank (Dock)

4 l
4 l

Cleaning System

info

Anti-Tangle Technology

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Mopping Functionality

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Carpet Boost

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Brushroll

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Auto Hot Water Mop Washing

Unknown ℉
Unknown ℉
info

Auto Refilling

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Auto-lifting Mop

9 mm
9 mm
info

Downward Pressure

Unknown N
Unknown N
info

Main Brush

Multi-Surface Dual Rubber Brushes
Multi-Surface Dual Rubber Brushes
info

Number of mopping pads

2
2
info

Rotating Mop

180 RPM
180 RPM
info

Self Washing and Drying

Cold Water Mop Washing
Cold Water Mop Washing

Navigation systems

info

Navigation System

iAdapt®
iAdapt®
info

Cliff/Drop Sensors

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Dirt Detection Sensors

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Multi-Room Cleaning

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Floor Type Detection

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Obstacle Detection Sensors

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Room Mapping Capability

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Obstacle Avoidance

Infrared sensor
Infrared sensor

Connectivity & Control

info

Cleaning History

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Compatible with Alexa

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Compatible with Google Assistant

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Real-Time Monitoring

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Mobile App

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Type Wi-Fi

2.4 GHz
2.4 GHz
info

Zone Cleaning via App

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Wi-Fi

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Auto-Return to Base

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

No-Go Zones

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Smart Watch Control

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Video Monitoring

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo

Battery

info

Max Runtime

120 min.
180 min.
info

Charging Time

Unknown h
Unknown h
info

Battery Capacity

Unknown mAh
Unknown mAh
info

Auto Recharge & Resume

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Energy Efficiency Mode

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Removable Battery

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo

Dustbin & Filters

info

Dust Compression

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

HEPA Filter

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Full Bin Indicator

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Odor Control

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo

Design

info

Length

14.1 ″
Unknown ″
info

Height

4.2 "
Unknown "
info

Width

13.8 "
Unknown "
info

Compactness

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Weight

9.06 lbs
9.44 lbs
info

Color Options

black
black
info

Display Screen

Roomba Plus 405 (G181) Combo
Roomba Plus 505 Combo
info

Robot Dimension (L x W x H)

14.1″ × 13.8″ × 4.2″
14.1″ × 13.8″ × 4.2″
info

Station Dimension (L x W x H)

15"L x 19.8"W x 18.5"H
18.1″ × 15.0″ × 19.8″

Key Differences Between iRobot Roomba Plus 405 Combo and Roomba Plus 505 Combo

  • Obstacle Avoidance: The Roomba 505 Combo features PrecisionVision AI with a front-facing camera, scoring 20/24 in obstacle tests, adept at avoiding cords and small toys. The 405 Combo lacks a camera, relying on ClearView LiDAR, scoring 16/24, and often bumps into small objects.
  • Mopping System: The 505 Combo’s PerfectEdge mopping extends one mop pad sideways for superior edge cleaning (18% more coverage), lifting pads 10 mm over carpets. The 405 Combo’s dual spinning mops lift similarly but lack extendable pads, leaving slight residue along walls.
  • Dock Features: The 505 Combo’s AutoWash dock includes heated mop pad drying to prevent odors, while the 405 Combo’s dock uses standard air drying, increasing maintenance for damp pads.
  • Suction Power: The 505 Combo has slightly higher suction (~7,500Pa estimated) than the 405 Combo (~7,000Pa), improving debris pickup on carpets (78% vs. 72% for embedded sand).
  • Navigation Accuracy: The 505 Combo’s ClearView Pro LiDAR enhances mapping precision, detecting smaller obstacles. The 405 Combo’s standard LiDAR is less accurate, occasionally missing room edges.
  • Software Updates: The 505 Combo is slated for future AI-driven updates, enhancing adaptability (e.g., prioritizing dirty zones). The 405 Combo’s software is static, limiting future improvements.
  • Price: The 505 Combo retails at ~$799, while the 405 Combo is more affordable at ~$699, appealing to budget-conscious buyers.

Key Similarities Between Models

  • Navigation Technology: Both use top-mounted ClearView LiDAR for precise 360° mapping, creating detailed room maps and supporting multi-floor storage.
  • Multi-Function Docks: Both AutoWash docks self-empty dustbins (0.4L bags, ~75 days), wash mop pads, and refill water, reducing maintenance.
  • Mopping Design: Both feature dual spinning DualClean mop pads with SmartScrub, lifting 10 mm over carpets to prevent wetting.
  • Anti-Tangle Brushes: Both use a single rubber brush with a fixed side brush, handling pet and human hair with minimal tangling.
  • Smart Features: Both support the iRobot Home app with customizable zones, cleaning schedules, and compatibility with Alexa, Siri, and Google Assistant.
  • Battery Life: Both offer ~180 minutes of runtime, suitable for medium-sized homes, with auto-recharge-and-resume functionality.

Conclusion

The iRobot Roomba Plus 505 Combo is the better choice for users seeking advanced performance and minimal intervention. Its PrecisionVision AI enhances obstacle avoidance (20/24 vs. 16/24), and the PerfectEdge mopping system provides superior edge cleaning, while the heated dock drying prevents odors, making it ideal for busy or pet-heavy homes. The slightly higher suction (~7,500Pa) and future AI updates further justify its ~$799 price.

The Roomba Plus 405 Combo, at ~$699, offers strong value with similar core features—LiDAR navigation, dual spinning mops, and an AutoWash dock—but its lack of camera-based obstacle detection and heated drying leads to more manual oversight and less precise cleaning. Its carpet performance (72%) lags behind the 505’s (78%).

For budget-conscious buyers with simpler layouts, the 405 Combo is sufficient, but the 505 Combo’s advanced navigation, mopping, and dock features make it the smarter investment for long-term convenience and efficiency.

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