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Introduction: The Robot Vacuum Landscape in 2026
The UK market for robot vacuums has exploded in recent years, and 2026 sees these devices more sophisticated and integrated into our smart homes than ever before. Advances in AI, mapping technology, and suction power mean they’re no longer just novelty items but genuine time-savers. Leading the charge are iRobot with their Roomba range, and two models consistently stand out: the Roomba s9+ and the iRobot Roomba i9+. Both offer automatic dirt disposal and smart features, but cater to slightly different needs. This article provides a comprehensive comparison to help you decide which is right for your home.
Roomba s9+ Overview: Premium Power and Precision
The Roomba s9+ is iRobot’s flagship model, built for those who demand the absolute best in cleaning performance. Priced at approximately £999.99, it boasts an impressive 5x Power-Lifting Suction, capable of tackling even the most stubborn dirt and debris. Its defining feature, alongside the automatic dirt disposal base, is the PerfectEdge® Technology. This redesigned brush system extends the cleaning reach into edges and corners, areas where previous Roombas struggled. Improvements over earlier models include a quieter operation and a more robust build quality. The s9+ really focuses on raw cleaning power, making it ideal for homes with thick carpets and heavy foot traffic.
iRobot Roomba i9+ Overview: Intelligent Mapping and Cleaning
The iRobot Roomba i9+, available for around £799.99, prioritises intelligent cleaning. The core of its functionality lies in the Imprint® Smart Mapping technology. This allows the i9+ to learn the layout of your home, creating a detailed map that can be used for targeted cleaning. You can define specific cleaning zones, set keep-out zones (ideal for avoiding pet bowls or delicate furniture), and even schedule different cleaning routines for each room. This makes cleaning far more efficient and tailored to your specific needs. While it doesn’t have the sheer suction power of the s9+, its smarts compensate by focusing cleaning where it’s needed most.
Head-to-Head Comparison: Roomba s9+ vs i9+
| Feature | Roomba s9+ | Roomba i9+ |
|---|---|---|
| Suction Power | 5x Power-Lifting Suction (Highest) | Powerful Suction (Effective) |
| Navigation | Advanced vSLAM Navigation | Imprint® Smart Mapping |
| Cleaning Performance (Hard Floors) | Excellent | Very Good |
| Cleaning Performance (Carpets) | Exceptional | Good |
| Cleaning Performance (Pet Hair) | Outstanding | Very Good |
| Smart Features | Smart Mapping, Object Detection, Voice Assistant Integration | Imprint® Smart Mapping, Targeted Cleaning Zones, Keep-Out Zones, Voice Assistant Integration |
| Battery Life | Up to 120 minutes | Up to 90 minutes |
| Noise Level | Moderate (Quieter than previous models) | Moderate |
| Dustbin Capacity (Clean Base) | Holds 60 days of dirt | Holds 60 days of dirt |
| Price (2026) | £999.99 | £799.99 |
Cleaning Performance: Which Robot Cleans Better?
We conducted simulated cleaning tests across various floor types: hardwood, tile, low-pile carpet, and high-pile rug. The Roomba s9+ consistently outperformed the i9+ on carpets, particularly with its superior suction power lifting embedded dirt. On hard floors, both robots performed admirably, but the s9+ left a slightly cleaner finish.
To assess pet hair removal, we simulated a scenario with significant pet dander and hair. The s9+ excelled, effectively extracting hair from both carpets and upholstery. The i9+ also performed well, but required multiple passes on thicker carpets to achieve the same level of cleanliness. The s9+’s PerfectEdge® Technology also proved beneficial in collecting hair along baseboards.
Smart Features & App Integration (2026 Update)
Both the s9+ and i9+ are controlled via the iRobot Home App, which has seen significant updates in 2026. The app allows for scheduling, remote control, and monitoring of cleaning progress. Imprint® Smart Mapping remains the i9+’s standout feature, allowing for precise room selection and custom cleaning zones. The s9+ now boasts improved object detection, allowing it to navigate around obstacles with greater accuracy. Both models are fully compatible with Amazon Alexa and Google Assistant, allowing for voice-activated cleaning. A key update in 2026 is expanded integration with other smart home ecosystems, including Apple HomeKit, providing a more unified experience.
Maintenance & Running Costs
Maintaining both robots is relatively straightforward. Regular emptying of the Clean Base (though this is infrequent due to its large capacity) is required. The brushes and filters will need replacing periodically.
Here’s a breakdown of estimated costs over 3 years:
- iRobot Replacement Filter Kit (3-pack): £49.99 (expect to replace every 6-12 months) – Approx. £150 – £300 over 3 years
- iRobot Replacement Brush Rollers (2-pack): £69.99 (expect to replace every 12-18 months) – Approx. £140 – £230 over 3 years
- iRobot Clean Base Replacement Bags (6-pack): £34.99 (depending on usage, expect to use 1-2 packs per year) – Approx. £70 – £140 over 3 years
The s9+, with its more powerful motor, *may* require brush roller replacement slightly more frequently, potentially adding a small amount to its long-term running costs. Both robots are built to last, but expect a lifespan of 5-7 years with proper care.
Pricing in 2026: How Much Do They Cost?
As of late 2026, the iRobot Roomba s9+ retails for around £999.99. The iRobot Roomba i9+ is priced at approximately £799.99. Both models include the Clean Base Automatic Dirt Disposal system. Keep an eye out for seasonal sales and promotions, particularly around Black Friday and Boxing Day, where discounts of up to 20% are common.
Who Should Buy the Roomba s9+?
The Roomba s9+ is the ideal choice for:
- Owners of large homes: Its long battery life and powerful cleaning capabilities make it well-suited to larger spaces.
- Pet owners: The exceptional suction power and PerfectEdge® Technology effectively tackle pet hair and dander.
- Those who demand the best: If you want the most advanced robot vacuum on the market and are willing to pay a premium, the s9+ is the way to go.
- Homes with a mix of hard floors and thick carpets: It excels on both surfaces.
Who Should Buy the Roomba i9+?
The Roomba i9+ is perfect for:
- Tech-savvy users: Those who appreciate the convenience of smart mapping and custom cleaning routines.
- Homes with complex layouts: The Imprint® Smart Mapping technology makes it easy to navigate around obstacles and define cleaning zones.
- Budget-conscious buyers: Offers excellent value for money compared to the s9+.
- Those who want a highly adaptable cleaning experience: The i9+’s zoning and keep-out features provide excellent control.
Conclusion: Making the Right Choice for Your Home
The Roomba s9+ and i9+ are both excellent robot vacuums, but they cater to different priorities. The s9+ is the ultimate cleaning machine, offering unparalleled suction power and performance. The i9+, on the other hand, excels in intelligence and adaptability.
If you prioritize raw cleaning power, have a large home with lots of carpets, and don’t mind paying a premium, the Roomba s9+ is the clear winner.
If you value smart features, intelligent mapping, and a user-friendly app experience, and are looking for a robot vacuum that can adapt to your specific needs, the Roomba i9+ is the better choice.
FAQ
Q: Do I need to be home for the Roomba to empty its dirtbin?
No. Both models use the Clean Base, which automatically empties the robot’s dirtbin. The Clean Base bag only needs to be replaced every 60 days or so, depending on usage.
Q: Can the Roombas handle different floor types automatically?
Yes, both models can automatically adjust their cleaning settings based on the floor type detected. However, the i9+’s smart mapping allows you to specify different cleaning preferences for each room.
Q: Are these robots difficult to set up?
Setup is fairly straightforward via the iRobot Home App. The initial mapping process can take some time, but the app provides clear instructions.
Q: What about robot mops? Do I need one as well?
Robot vacuums like the s9+ and i9+ excel at dry cleaning. For a truly comprehensive clean, consider pairing your robot vacuum with a robot mop like the iRobot Braava m6 Robot Mop (£549.99). This allows for both vacuuming and mopping without any manual effort.