# Which cat litter box has the largest capacity? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which cat litter box has the largest capacity?

## Products

### homerunPET CS106 Self-cleaning Litter Box
```yaml
product: homerunpet-cs106-self-cleaning-litter-box
brand: homerunPET
price_gbp: 521.53
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 27.44 in L × 23.62 in W × 28.07 in H
entry_size: 18 in litter bed
odor_control: Fresh gel deodorizer and sealed waste drawer
easy_to_clean: Tool-free disassembly; removable drum and front waste drawer
self_cleaning: true
litter_capacity: 106 L
number_of_access_points: 1
```

- **Price:** £521.53 [^1]
- **Summary:** The homerunPET CS106 is an extra-large, app-connected self-cleaning litter box with a 106 L interior, 12 L waste drawer, and 4.5 L auto-refill reservoir. It uses a rotating sifting drum, multiple safety sensors, and included deodorizer to reduce odor and maintenance, aimed at multi-cat or large-cat households.
- **Ideal For:** Ideal for largest-capacity needs because it offers a 106 L interior volume and a 12 L waste drawer, the largest listed capacities for a self-cleaning unit.
- **Additional Sources:** [^2]

### homerunPET CS106 Self-cleaning Litter Box CS106
```yaml
product: homerunpet-cs106-self-cleaning-litter-box-cs106
brand: homerunPET
price_gbp: 521.53
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 27.44 in L × 23.62 in W × 28.07 in H
entry_size: 10.24 in W × 10.63 in H
odor_control: Fresh Gel Deodorizer and sealed drawer
easy_to_clean: Tool-free disassembly; front waste drawer
self_cleaning: true
litter_capacity: 106 L
number_of_access_points: 1
```

- **Price:** £521.53 [^1]
- **Summary:** The homerunPET CS106 is a large, app-enabled self-cleaning litter box with a 106 L dome, 4.5 L auto-refill reservoir, and a 12 L sealed waste drawer. It uses a rotating sifting system, multiple safety sensors, and includes deodorizer, filters, and tool-free disassembly for deep cleaning, making it suited to multi-cat households and large cats. Quiet operation (~34-38.8 dB) and an app for monitoring complete the feature set.
- **Ideal For:** Ideal for largest-capacity needs because it offers a 106 L interior volume and a 12 L waste drawer, larger than typical consumer automatic litter boxes.
- **Additional Sources:** [^2], [^1], [^2]

### IRIS Ohyama Large High-Sided Litter Box with Scatter Shield
```yaml
product: iris-ohyama-large-high-sided-litter-box-with-scatter-shield
brand: IRIS Ohyama
price_gbp: 17.15
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 30 L x 20 W x 14 H in
easy_to_clean: true
number_of_access_points: 1
```

- **Price:** £17.15 [^3]
- **Summary:** Open-top, high-walled litter pan with a scatter shield and smooth interior for easy cleaning; available in Large and XXL sizes to suit bigger or multiple cats. Designed to reduce litter scatter and simplify maintenance with durable plastic construction and removable components. Suits households needing a roomy, open-access box rather than a covered/self-cleaning unit.
- **Ideal For:** Ideal for largest-capacity needs because the XXL size measures 30 L x 20 W x 14 H in, offering the biggest internal volume among standard open-top IRIS pans.
- **Additional Sources:** [^4], [^5]

### Neakasa Neakasa M1 Automated Litter Box
```yaml
product: neakasa-neakasa-m1-automated-litter-box
brand: Neakasa
price_gbp: 298.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 23.26 in x 20.67 in x 20.2 in
entry_size: 17.09 in x 15.75 in
odor_control: Pull & Wrap; OdorSeal
easy_to_clean: true
self_cleaning: true
litter_capacity: 7.17 L
number_of_access_points: 1
```

- **Price:** £298.43 [^6]
- **Summary:** The Neakasa M1 is an open-top, self-cleaning automatic litter box with an internal rotating drum that separates waste into a sealed bin. It features infrared and weight sensors for safety, an 11.23 L waste bin, odor-sealing systems, app control, and is suitable for cats up to 33 lbs. It suits multi-cat homes seeking reduced daily scooping and strong odor control.
- **Ideal For:** Ideal for users needing large waste capacity: it has an 11.23 L waste bin and 7.17 L litter chamber, allowing up to 10-14 days between emptying.
- **Additional Sources:** [^7], [^8], [^7], [^8], [^6]

### Petsnowy Petsnowy Snow+ Modular Automatic Litter Box
```yaml
product: petsnowy-petsnowy-snow-modular-automatic-litter-box
brand: Petsnowy
price_gbp: 394.69
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 29.5 in L x 20 in W
entry_size: 8.7 in x 8.7 in
odor_control: TiO2 technology, fragrance box, sealed waste drawer
easy_to_clean: Modular magnetic design, removable globe, auto-sealing waste bags
self_cleaning: true
litter_capacity: 10 L
number_of_access_points: 1
```

- **Price:** £394.69 [^9]
- **Summary:** The SNOW+ is a modular, sensor-triggered automatic litter box with a rotating sifting system, TiO2-based odor control, a 10 L auto-sealing waste drawer, and a magnetic design for easier deep cleaning. It targets multi-cat households and owners who want reduced odor, tracking, and hands-on scooping.
- **Ideal For:** Ideal for users needing the largest capacity because it includes a 10 L auto-sealing waste drawer and is designed for multi-cat use.
- **Additional Sources:** [^10], [^11], [^9], [^10], [^11]

### PTLOM PTLOM Stainless Steel XL/XXL Litter Box
```yaml
product: ptlom-ptlom-stainless-steel-xl-xxl-litter-box
brand: PTLOM
price_gbp: 96.99
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 27.3 L x 19.4 W x 15.7 H in
odor_control: Stainless steel resists odors
easy_to_clean: true
self_cleaning: false
```

- **Price:** £96.99 [^12]
- **Summary:** Stainless-steel high-sided litter box available in XL/XXL/XXXL sizes with tall walls (up to 15.7 in) for superior litter containment and durability. Made from food-grade stainless steel that resists odors and is wipe-clean, it suits multi-cat homes and large breeds. No motors or automatic cleaning - designed for manual scooping and long-term use.
- **Ideal For:** Ideal for the question about largest capacity because the XXL/XXXL models offer the largest external dimensions (up to 27.3 L x 19.4 W x 15.7 H in), providing the most internal volume.
- **Additional Sources:** [^13], [^14]

### Whisker Litter-Robot 5
```yaml
product: whisker-litter-robot-5
brand: Whisker
price_gbp: 596.14
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 22 in x 27 in footprint; 29.9 in height
odor_control: Sealed waste drawer; Carbon Filter; WasteID™ for targeted odor control
easy_to_clean: Waste drawer removable; globe recommended basic clean every 1-3 months
self_cleaning: true
litter_capacity: MAX fill line inside globe (manufacturer does not list volume)
number_of_access_points: 1
```

- **Price:** £596.14 [^15]
- **Summary:** The Litter-Robot 5 is a self-cleaning, multi-cat automatic litter box with a large globe, sealed waste drawer, WasteID™ odor-targeting technology, and app connectivity; it suits multi-cat households and owners who want automated waste removal and monitoring. The unit supports up to five cats and includes carbon filtration and removable components for maintenance. It is available in standard and Pro variants (Pro adds integrated cameras and advanced insights).
- **Ideal For:** Ideal for largest-capacity needs because it supports up to 5 cats, has an expanded globe and a larger waste drawer for less frequent emptying (manufacturer lists multi-cat support and larger waste drawer vs prior models).
- **Additional Sources:** [^16], [^17], [^15], [^16], [^17]

---
## References & Sources
[^1]: homerunpet, accessed 2026-06-14. https://homerunpet.com/products/cs106-self-cleaning-litter-box
[^2]: Petsworthy, accessed 2026-06-14. https://petsworthy.com.au/products/cs106-self-cleaning-litter-box
[^3]: IRIS USA (official), accessed 2026-06-14. https://www.irisusainc.com/products/large-cat-litter-box-with-scatter-shield-and-scoop-open-top-high-sided-cat-litter-pan-blue
[^4]: Target, accessed 2026-06-14. https://www.target.com/p/iris-usa-extra-large-open-top-cat-litter-box-with-scatter-shield-sturdy-easy-to-clean-open-air-kitty-litter-pan-with-tall-spray-black/-/A-91376917
[^5]: Walmart, accessed 2026-06-14. https://www.walmart.com/ip/IRIS-USA-Extra-Large-Open-Top-Cat-Litter-Box-with-High-Sides-Easy-to-Clean-for-Big-Cats-Navy/5538184865
[^6]: Neakasa Official Store, accessed 2026-06-14. https://neakasa.com/products/m1-plus
[^7]: BestBuy, accessed 2026-06-14. https://www.bestbuy.com/product/neakasa-m1-plus-open-top-self-cleaning-cat-litter-box-gray/J3R84HX9HP/sku/12044339
[^8]: Walmart, accessed 2026-06-14. https://www.walmart.com/ip/Neakasa-M1-Plus-Self-Cleaning-Litter-Box-Step-Stool-Bundle-Odor-Free-Automatic-Waste-Disposal-Sensor-Easy-Clean-Tray-Includes-Trash-Bags-Cats/18950911470
[^9]: PetSnowy, accessed 2026-06-14. https://petsnowy.com/products/petsnowy-snow-self-cleaning-litter-box
[^10]: PetSnowy (warranty test page), accessed 2026-06-14. https://petsnowy.com/products/snow-self-cleaning-litter-box-for-warranty-test-only
[^11]: Walmart, accessed 2026-06-14. https://www.walmart.com/ip/PetSnowy-Snow-Self-Cleaning-Automatic-Litter-Box-with-Odor-Free-TiO2-System-for-Cat/5794161381
[^12]: PTLOM official store, accessed 2026-06-14. https://ptlom.com/products/cat-litter-box-with-lid-semi-enclosed-xxxl
[^13]: PTLOM official store (XL options), accessed 2026-06-14. https://ptlom.com/products/ptlom-high-sided-cat-litter-box-front-entry-with-lid
[^14]: PTLOM official store (14.5 High-Sided Flip), accessed 2026-06-14. https://ptlom.com/products/ptlom-14-5-high-sided-flip
[^15]: Whisker (official store), accessed 2026-06-14. https://www.litter-robot.com/litter-robot-5-pro.html
[^16]: The Quality Edit (shop listing), accessed 2026-06-14. https://www.thequalityedit.com/articles/self-cleaning-litter-robot-5-review
[^17]: Good Housekeeping (shop listing), accessed 2026-06-14. https://www.goodhousekeeping.com/home-products/a69733299/litter-robot-5-review/