Litter Robot III Open-Air – Full Review

Litter Robot III Open Air


(4.9/5)Litter Robot Open-Air automatic litter box is the top innovation and rated as the best self cleaning litter box according to thousands of customers reviews.

The cleaning mechanism remains the same than previous versions—a rotating globe that sifts the litter, dropping the waste into a lined bottom drawer.

The Open-Air adds great features, such as a full indicator light that will display when the waste drawer is full, an automatic blue night light that turns on when dark, helping cats to orientate at night, especially elderly cats. Litter Robot III also adds a control panel lockout, adjustable wait time and 8-hour sleep mode.

(You can get a very good price for this unit, more details on the end of this review)


  • Sophie and the Litter Robot Open Air

    Sophie and the Litter Robot Open Air

    Fully self-cleaning litter box, no more scooping

  • Ergonomic chamber accommodate big cats
  • Larger upward facing entry gives cats an ‘Open Air’ feeling
  • Adjustable wait time 3-7-15 min
  • ON/OFF button
  • Night light to see the unit in the darkness
  • Control panel lockout
  • Full indicator light
  • Suitable for multiple cats
  • It saves up to 50% on litter
  • Lip extender and rubber mat on the step reduce litter spillage
  • Filtration system with vents in the waste drawer reduces odor
  • 90 Day Money Back Guarantee
  • 18 Month Warranty
  • Color: Bisque
  • Durable Construction
  • Power: 120 volt outlet – 15 VDC
  • Made in the USA


  • Fully assembled: 29.2″ H x 24.1″ W x 26.7″ D
  • Waste drawer: 12 3/4″ W x 15.5″ L x 5″ D
  • Waste port: 5 1/2″ W x 5 3/4″ L x Diagonal 6 ¼”
  • Oval shaped entry opening: 15.2″ H x 10.7″ W
  • Litter area at maximum litter capacity: 14″ across ( 3” at the deepest point)
  • Room for the cat’s head inside the globe: 15″ to 17″
  • Widest point inside the globe: 20″ across
  • Depth of globe: 20″ front to back

Check a here diagram of the Litter Robot with all the above dimensions.

Litter Robot unboxed

LRIII in the box and my Sophie


The Litter Robot features handles on the sides so you can lift the unit once you’ve removed all pieces of cardboard from the box that protect the unit.

When you open the box you will find:

√ The LRIII Open Air assembled
√ Carbon filter (already inserted on the waste drawer)
√ AC adapter
√ 3x Drawer Liner
√ Manual Instructions
√ Quick Guide Reference
√ Returning Instructions
√ “Meow” sticker (cute)




Litter Robot II vs Cat sizes

The new Open-Air LRIII can accommodate bigger cats with its ergonomic, larger oval shaped entry and litter chamber so it works with any cat weighing between 5 and 20 lbs. approx.

The self-adjusting sensor is calibrated to detect any weight from 5 lbs and more so if you have a kitten he or she must weigh at least 5 lbs to use the Litter Robot safely. If your kitten weighs less than 5 lbs, you need to use the unit manually until your cat is grown enough to use the machine in automatic mode.

See a picture of my cat inside the unit doing her business. She has plenty of room to turn around, dig, etc. She is 20 inches long without tail and weighs 8 pounds.

Sophie using the Litter Robot

Sophie using the Litter Robot



Litter Robot Open Air side

When your cat uses the Litter Robot Open Air, a 7-minute countdown will start and the globe will rotate a cleaning cycle, sifting the clumps that drop into a waste drawer at the bottom of the unit. The whole cleaning cycle lasts approx. 1-2 minutes.

Finally, to clean the unit simply pull the drawer and grab the bag for easy disposal.

The previous models of the Litter Robot required the adjustment of the sensor to more or less sensitive but the new Open-Air version has a self-adjusting sensor that can be used easily with multiple cats without calibration problems. With the self adjustment sensor the cat’s weight gets registered as soon as it gets in the Globe and not when it steps on the step.



(I didn’t get to catch my cat actually doing her business, but I got there quick enough to film the video when she was still inside the unit)



When it comes to level of noise both versions have same level (not too loud and not too low).

Waste drawer vents and charcoal filter

√ Drawer full indicator. This feature allows you to be alerted when time to empty the waste drawer through a blinking light indicator. The unit will still do 3 more cycles and only after that the machine will stop from operating if not emptied.

√ Clean cycle settings. Adjustable to 3, 7 or 15 minutes before the globe starts rotating. Previously it was 7-minute by default.

√ LED night light with nice blue color for your cat to see the unit better in the darkness.

√ Self-adjusting cat sensor.

Blue LED night light

Blue LED night light

The sensor is connected to the Globe and not to the entry step as previous versions. Even if your cat jumps to the litter box the unit will start a cleaning cycle as soon as your leaves the box.

√ 8hr sleep mode. You can stop the unit from operating at night from the time you set it. The machine will continue operating the next day normally and the sleep mode will repeat every night.

√ Control Panel Lock Out. You can lock out the button functions on the Control Panel so your kid or that mischievous cat won’t be able to start a cycle.

√ Accessory battery back-up option (no included). The unit will still operate in case of power outages, up to 48 hours for 2 cats (with 10 cycles a day)

√ Bigger entryway and litter chamber. Now the unit is larger, allowing bigger cats entering the litter box much easier and it provides cats more room inside to turn around.

√ Waste Drawer with vents and charcoal filter. Now the unit has better odor control in the waste drawer than before.

√ Location of control panel on upper right side for easier access.

√ Bonnet that covers the Globe and it also contains wires, electrical terminals for the blue LED light to work.


√ Less contact of your cat with waste. This is a major difference. The Litter Robot Bubble doesn’t feature the Plastic Shield and this is a very important improvement, because this piece that goes inside the chamber right above the sifting screen is a sort of barrier that allows the clumps to slid directly to the hole where they drop, this way it keeps the interior of the Globe clean from feces.

With the Classic and Bubble happened sometimes that the top of the Globe, due to the lack of this piece, had some feces on it and the cat got it on its fur.

On the picture you can have a better idea of the function of this important part of the new LRIII Open Air.



To setup the unit is so easy since the Litter Robot comes already assembled.

Litter Robot III plug location

Litter Robot III plug location

To put litter in the litter robot just pour clumping litter directly through the entry. You need to pour about 12 and 13 (8-Oz) cups of litter on the litter box.

Then you need to plug in the machine so insert the small round plug end to the Litter Robot socket located on the back of the unit.

Finally you push power button for the unit to start a rotation. A blue light will show the litter box is ready to be used by your cat.

Note: If your cat is skittish, make sure not to do this right away and wait until your cat is confident enough to start using the Litter Robot.





Blue default light

Blue default light

On the control panel you will see 7 buttons in total, 4 vertically lined up and 3 small ones on the bottom. The first small on top is the ON/OFF button, below the buttons “Cycle”, “Empty”, “Reset”.

Yellow light when the unit is cleaning

Yellow light while rotating

Cycle: allows you to start a cleaning cycle manually
Empty: you can empty the globe to change litter or clean the unit
Reset: push this button to stop unwanted activations

The 3 small buttons at the bottom are “timing”, “cycling” and “ready”.

Red light waiting to start a cleaning cycle

Red light shows activation

Timing: shows a red light when the unit is activated to start a cleaning cycle.
Cycling: displays a yellow light when the Litter Robot is cleaning
Ready: this button shows a blue light by default and it turns back to blue once the cleaning cycle is finished and the machine is ready for another use.



Collected waste after 7 days with a 8 lbs cat

The unit can be disassembled in 4 parts: Base, Globe, Bonnet and Waste Drawer. The globe and waste drawer are submersible for easy washing. The base and bonnet can’t be in contact with water since they have electronics. Check my article how to disassemble the Litter Robot where I explain step by step how easy it is.

It’s recommended to wash the globe once a month or as needed with a mild detergent and no bleach (in my case I go a litter longer than that with my cat). When I clean the waste drawer I use a little bleach though. A full cleaning of the Open Air is necessary to keep your machine operating for years.

The waste disposal depends on how many cats use the litter box, the size of your cat and the weather. For example, with my cat Sophie (she’s one year and 5 months old and weighs 8 lbs) I need to empty the waste drawer every week during hot weather. With cool weather, up to 10 days.

The Litter Robot III requires very minimal maintenance, only topping off the litter once a week and grabbing the bagged waste.




  • Very easy to set up, it comes fully assembled
  • It works reliably and effectively ( I have left my cat alone for 7 days and it works great)
  • Litter area made from thick rubber that handles the cat’s scratching and digging
  • Adjustable wait time for a cleaning cycle from 3-7-15 minutes
  • Full light indicator to empty the waste drawer
  • Better odor control with vents and charcoal filter on waste drawer
  • Larger new design suitable for bigger breed cats
  • The unit can be filled with litter directly through the entryway
  • Blue LED night light helps cat to use the litter box at night
  • Self-adjusting sensor allows the unit to work reliably on any floor and with any cat’s weight (over 5 lbs)
  • Sleep mode allows you to stop the unit from operating at night
  • No rakes to clean and no clogs
  • Easy to change litter with a push of a button
  • Well designed sifting system does not get anything stuck on the bottom or walls
  • You can use any 8-13 Gal trash bag to dispose the waste
  • It saves in cat litter up to 50%
  • Cleaning cycles by a push of a button
  • Suitable for multiple cats
  • Much easier to clean than previous version with its larger opening
  • Reset button allows you to restart the unit to keep it working normally


  • The unit is bigger so it’s bulkier
  • Waste drawer increased slightly its capacity regarding previous versions but not a lot (though it holds waste up to 10 days with a 8-lbs cat like mine with cool weather)
  • Panel doesn’t show the current wait time (3, 7 or 15 min) so there’s not a way to check the new wait time if you decide to change it.
  • Litter amount is very specific so you need to trial and error a little bit to get the exact amount (as the video review states, 12 to 13 cups is a good amount of litter)
  • High price


Personally, this “Con” has not happened to me with my unit and I have had it for a year, but I thought I should mention this in case you see other reviews mentioning this. There are few customers stating that the rubber lip on the entry detaches from the Globe when it rotates. This is just cosmetic and doesn’t affect the function of this machine at all, but I wanted to show you on the following video that my unit has never had this cosmetic “Con”.




Some cats are so fascinated with the Litter Robot Open Air being always clean and fresh that they start playing with it getting in and out or just chilling on it :-). This could create the machine doing useless rotations often. This is not a product defect but if this happens to you, you need to educate your cat to stop from playing with the unit (I did that and my cat stopped). If an unwanted rotation is activated (red light) simply push the “reset” button to cancel.


  • If your cat only jumps to enter/exit the unit, you can get the Litter Robot ramp for your feline friend to get inside, reducing litter spillage and tracking. This ramp is part of a wide variety of the accessories that you can get to upgrade your machine.
  • Make sure to top the Litter Robot off with litter every week with one cat. If the unit gets too low in litter the sensor won’t activate the cleaning cycle after your cat uses it. This is because the sensor is calibrated with a specific amount of litter plus the cat’s weight in order to activate the cleaning cycle (the red light on) when the cat is inside.
  • Any 8-13 gal trash bag or kitchen bag will fit the waste drawer of the unit. I use those 13-Gal kitchen bags with drawstring so when I put the bag on the waste drawer I leave the drawstring flat and tight along the edges (as the picture above). This leaves no gap between the bag and the drawer. Currently, I am using the Litter Robot liners that I got by purchasing the Accessories Kit. The liner fits very well to the waste drawer and I am using them mostly because they are biodegradable plastic, hence more environmental friendly.
  • If your cat always hesitates on things get an “attract cat litter” to entice it to use the litter box.
  • The best cat litters to use with the Litter Robot III are Premium clay clumping litters such as, Dr. Elsey’s Precious Cat Ultra Clumping, Arm & Hammer Double Duty, Arm & Hammer Clump & Seal (regular version), Tidy Cats clumping kitty litter, Ever Clean cat litter. Crystals or litter pearls may work, but only if small enough to be sifted by the screen in the globe.
  • Almost 99% of cats adopt the Litter Robot with no problem, but some cats are more stubborn and might take longer to adapt to the litter box. Have patience and use simple tricks, such as catnip or treats.


Litter Robot III Open-Air’s new improvements and design reduces substantially any possible blockage of the Globe, ensuring an even better reliability. Also, the unit has a much better odor control than previous versions which is a major improvement that cat owners really appreciate.

√ Litter Robot III Open-Air is highly recommended:

  • For cats weighing between 5 lbs up to 20 lbs
  • For multi-cat households
  • If you want to forget about the litter box for 4-5 days or more with two cats
  • To forget about the litter box up to 7-10 days with one cat.
  • If you don’t want contact with cat’s waste anymore
  • If you want a reliable machine
  • For trips up to 7 days if you have one cat (always leave someone checking on your cat though)

x The unit may not be suitable:

  • For kittens under 5 lbs (unless used manually)
  • If your cat does not like enclosed areas (the oval entryway is really big though)
  • If you don’t use clay clumping litter
  • For houses without room enough to locate the unit (with a power outlet close)



My name is Lorena Avila and I’ve been researching and investigating automatic litter boxes for years (exactly 4) and most of them have similar fails, but I can tell you with authority that the Litter Robot Open Air is the best self cleaning litter box you will ever find.

I must confess that I wasn’t a real fan of automatic litter boxes. I was like “I don’t mind cleaning my cat’s litter box”, but only when you own a Litter Robot Open Air you realize how much your life changes as a cat owner. This unit will be my partner forever from now on because it has given me a gift that nobody can give me, EXTRA TIME!

You can avoid paying full retail price for this unit and instead pay only $449 for this great machine. On top of that, and due to this in-depth review, the Manufacturer granted me the chance of giving you $25 off your purchase, so you will be paying only $424, including shipping and 90-day full guarantee.

Click on this link to access this great limited opportunity! The $25 off will be reflected at the checkout.

TAKE ADVANTAGE OF BLACK FRIDAY! You can get your Litter Robot Open Air including a 3-year warranty for only $449! But through my link you can apply $25 off so you can get your unit including a 3-year warranty for only $424. arrowLitter-Robot

Or if you prefer, you can get the unit in Amazon.


Maybe you have some concerns or questions about the Litter Robot Open Air. Just ask me on the comment section and I will answer honestly and quickly.

Thanks for reading!


Lorena Avila is a Marketing Engineer, Writer, cat figures collector, cat lover and cat owner as well but above all a very passionate investigator of felines. She started investigating cat products 5 years ago when she couldn't find reliable reviews on the internet to buy an automatic feeder for her own cat and since then she has been helping others providing honest information online.

42 Responses to “Litter Robot III Open-Air – Full Review”

  1. Kathya Perez says:

    How often I have to change the charcoal Filter and how much is it?
    How much I will save in litter if with this one I have to buy a better litter quality?

    • Lorena Ávila says:

      Hello Kathya, the set of 3 carbon filters cost $18.99. The carbon filter is not required for the Litter Robot to operate and the frequency for its replacement is only a matter or personal preference. With that said, one filter should last a few months under normal use with one cat.

      Regarding the litter, it’s not a must to use expensive litter, you can use any cumpling cat litter, the ideal is premium, but using any brand of clumping litter will work with the Litter Robot. The saving in litter it’s up to 50%.

    • Lorena Ávila says:

      Hi Chris! Any good clay clumping litter works with the Litter Robot III Open Air.

    • Mikayla says:

      I’m wondering this too. I can’t seem to find anything that definitely says how well natural litter works with this or any other self cleaning litter box. As the first reply points out, good clay litter works well, but I don’t want to downgrade back to clay litter just for my convenience. The litter I use (Arm & Hammer Essentials which is made of corn fibers) doesn’t clump as well some clay litter that I’ve used in the past, so I’m curious how much this affects the cleaning.

      • Lorena Ávila says:

        Hi Mikayla, the Litter Robot works with a sifting mechanism which needs a clumping litter to clump fast so only the clumps get dropped into the waste drawer. Any other litter that does not clump very good will work with the Litter Robot just not as well.

  2. erin says:

    yes how much is product where do i buy it?

  3. brenci sabrina says:

    dove posso comperare questa lettiera in ITALIA?

  4. Mat says:

    Hi there does anyone know if I can purchase Open Air unit in Australia?

  5. Cat says:

    I really appreciate all your time & work to provide this review. My concern with automatic litter boxes is how the sifting process works if kitty has soft bowl movements, which does not necessarily form a solid clump. Will the sifter handle this? Will the mess get stuck to/in the sifter, or if this softer clump separates as it hits the sifter will it just fall through the sifter back into the litter that should now be clean? How easy is this unit to clean? Does having soft clumps make more work to clean the sifter? I have 2 kitties & I’m looking to switch to an automatic system because of my osteoarthritis. The bending, scooping & changing out/cleaning litter boxes is getting harder for me to do. Thank you again for your help. Blessings!

    • Lorena Ávila says:

      Hello Cat. If you want to work less to clean your litter box, the Litter Robot Open Air is your best option since you can forget about it for up to 6 and maybe 7 days with two kittens. The only bending you will do is topping off the litter box with litter every week or so and opening the waste drawer to grab the bagged waste. Regarding soft clumps, my cat once had diarrea and the Litter Robot didn’t have any problem sifting the clumps without getting stuck on the screen at all. The key here is the litter you use. I use Arm & Hammer Double Duty and I have NEVER had any clump stuck on the sifting mechanism nor any mess on the screen either. Keep the default time which is 7 minutes because it’s the perfect wait time for the clumps to form well.

      Also, the design of this unit is so well made that the clumps NEVER return to the clean litter, somehow they always fall into the waste drawer, I have observed this to happen and I smile when I see sometimes clumps almost getting away from falling, and nope! they always fall, always. I am sure there is a lot of engineering involved on this for this design to be that effective.

      To clean the globe, you need to empty the litter by pushing a button that will make the litter go to the waste drawer (inside the bag) and then you can remove the Globe to wash it. What I would suggest you due to your medical condition is to simply clean the inside with a wet paper towel carefully, making sure not to put too much water inside (there are some electrics on the bonnet of this unit), just enough to be able to clean the machine ( I actually do this, I don’t remove the globe, and it’s perfectly clean). I hope this helps!

  6. Pooja says:

    Hi Lorena,

    Wonderful job on the review. I love how detailed you are but you also make it a point to highlight the pros and cons for someone doing a quick read. Thanks to you I found this litter box, and my life has been SO much easier. Mozzie loves his new litter box too. He is so fascinated by it, but I am glad he uses it!

    Recently though I have been getting the blinking yellow light during a cycle and the unit stops rotating. As per the guidebook it means that the cat sensor was activated / bonnet was removed. I know for a fact that the bonnet isn’t removed, and Mozzie hasn’t attempted to enter the globe. Have you faced this before? What did you do? Wondering if there is a good source of troubleshooting guide I can follow to figure out why the sensor is getting activated. I will be calling customer service too, but any tips from you are appreciated 🙂

    Thanks again for the reviews. And the site in general. This is where I found Mozzie’s food dispenser too 😀

    • Lorena Ávila says:

      Hi Pooja, I am glad I can help you with my reviews! Regarding the Litter Robot, what you describe hasn’t happened to me and I have had this unit for over 5 months. What I think it could be happening to you is that you put too much litter on it or the litter you use is too heavy. Have you changed the litter recently? Check that the litter you put isn’t more than 13 cups. If that doesn’t help you must call their customer service to help you with a troubleshooting. They usually figure things out quickly. Hope that helps!

      • Pooja says:

        Hi Lorena – it was just that, I had too much litter 🙂
        Working perfectly fine now. Thank you.
        Do you also have any reviews on interactive cat toys or petcams? I have been looking into getting a petcube for mozzie, but wanted to see if you had any experience with them or have done any reviews.

        • Lorena Ávila says:

          I am happy to know it`s all good with your Litter Robot. Regarding reviews for petcams I have some reviews made for remote pet treat cams but they all have some pros and cons that you will see on the reviews. You can check these reviews here. About interactive cat toys, I have made reviews for treat toy dispensers and I am starting to make reviews for interactive toys. I highly recommend the SmartyKat Hot Pursuit, my cat goes crazy with it! I am working on that review right now and I will post it tomorrow or the day after.

  7. Lori says:

    Thank you for the information

  8. Yvonne says:

    Hi Lorena
    Thanks for your reviews/info. I’m wondering does this unit comes with a cover/lid or hood? You, my cats like to scratch the litter before and after business. Lots of litter fall out of the pan each time. Also if shipping to Singapore is possible and not too costly, I would like to buy one. Do you know? Thanks again

    • Lorena Ávila says:

      Hello Yvonne, if your cats kick a lot of litter when doing their business there is a fence that you can buy as accessory. The purpose of this fence is serve as barrier for the kicked litter. In this review you will see the list of accessories for the Litter Robot III where you can find the fence. I don’t know if they ship to Singapore, you can contact them and ask, maybe they will. Good luck!

  9. Sheri says:

    I’m interested in purchasing one of these units. I have been a loyal customer of Littermaid’s electric cat boxes for many years but in the past two years I’ve now gone through 2. I now need to order a 3rd as the switch just died. The first electric box I had for over 8 years. Their quality has gone downhill. Do you have any idea how long one of these Liter Robots last?

    • Lorena Ávila says:

      Hello Sheri, the Litter Robot is solidly constructed. I personally have mine for almost 7 months and I don’t see any sign of not working. It keeps working with no problem at all. I don’t really know how long the unit lasts for sure but seeing how mine is working I am guessing at least a couple of years up to 3 or 4 years. I think this will depend if you have one cat, which is my case, or if you have multiple cats.

  10. Myra Whitlock says:

    How do you adjust the sensitivity of the open-air LR?

    • Lorena Ávila says:

      Hello Myra, with the Litter Robot Open Air you don’t need to adjust the sensor 🙂 It is self adjusting.

  11. JAM says:

    I would love to purchase this item but the price is too steep on my teacher’s salary. Does this company ever have a super sale? I saw the extra 25 on your review but it still doesn’t lower the price enough. Thank you for your time.

    • Lorena Ávila says:

      Hello Jam, unfortunately they don`t offer more savings for these units. I wish I could give you a better saving than this.

  12. Kay says:

    What is the average lifespan of the litter robot III open air?

    • Lorena Ávila says:

      Hello Kay, I have been using my Litter Robot since about April this year and so far so good. I calculate it will last about 2 years using it with one cat, but I am really guessing, this unit is really solid so may last for up to 3 or 4 years with good use and maintenance.

  13. Lyn says:

    Hello! Thanks for the great review. I actually order the unit before I found your review and weren’t able to travel advantage of the $25 discount! Do you think I can take that discount when I order the accessories (the fence and replacement carbon filters) from website? If you have a promotional code I can use that would be a great help. Thanks!

  14. Monique Gagnon says:

    Hi, thanks for the great review. I’m concerned with your comment about the lifespan of this unit lasting only 2 years. Considering the expensive price and quality of unit, why would you think it could last only 2years? I would expect a way longer lifespan with such an expensive unit. Any input would be appreciated. Thanks.😊

    • Lorena Ávila says:

      Hi Monique, I just made a guess, I don`t really know for sure how long my Litter Robot is going to last, I am sure it can last much longer than that, but I am not the expert that made this machine, I am just a reviewer. I will be updating my review, so far it`s been almost 10 months and the machine it`s still running normal and I don`t see any signs of deterioration at all.

  15. Kerri says:

    Can these be shipped to Australia?

  16. Norma says:

    Hi Lorena,
    Thanks for the review, it was very good. I live in Mexico and would like to get one litter Robot from your site, but I don’t know if you can ship to Mexico. I live very close to McAllen, Texas. Thanks in advance for your response 🙂