Each Halo treats up to 10 m². Litter smell drifts from room to room, so most homes stay freshest with one unit in every room where your cat spends time.
Halo Litter Odor Eliminator
$24.99
Halo runs on negative ion technology. It sends a steady stream of ions into the room, and those ions bond with the ammonia and sulfur compounds behind litter smell so the odor breaks down instead of drifting around your home. Plug it in near the box, press once, leave it running.
Subscribe & Save 20%
Ion emitter output gradually declines after about three months of continuous use. Subscribers receive a fresh Halo every 90 days at 20% off, so odor control stays consistent. Keep the previous unit as a backup or use it in a second room. Cancel anytime.
Delivery every: 90 days (recommended)
$19.99
$24.99
Secure checkout Fast shipping 30-day returns
Lauren J.
Can’t smell the litter box anymore. Honestly surprised.
Amelia K.
My boyfriend asked what I did because the cat smell was gone.
Halo by the numbers
Halo by the numbers
50 m³/h
Air circulated
through the room every hour
0 dB
Whisper quiet
quieter than a soft conversation
0 m²
Room coverage
per unit, about 108 sq ft
Clear the Litter Smell
Walk past the litter box and smell nothing. Halo releases negative ions that target ammonia and sulfur compounds, helping break down litter odor in the air instead of covering it with fragrance. Simply plug it in, press the button, and let Halo do the rest.
How Halo clears the smell
Halo targets the two things behind litter smell and keeps the air around the box clean.
Neutralize odor
Negative ions bond with ammonia and sulfur odor molecules and break them apart, so the smell loses its bite.
Key Benefits
Settle dust and dander
The same ions charge airborne dust, hair and dander so it drops out of the air you breathe.
Key Benefits
Quiet and low power
Runs under 36 dB on about a watt, with no heat and no moving parts.
Key Benefits
Nothing to maintain
No filters to buy. Rinse the small dust screen now and then.
Key Benefits
What Cat Owners Say
"I cannot believe how fresh the place stays now."
"Quiet enough that I forget it is on."
"No refills, no fuss. The smell is just gone."
"Two cats in a studio and it finally feels fresh."
How Halo works
From plug-in to fresh air, here is what happens.
Plug it in
Place Halo near the litter box, in an outlet or wall-mounted above it.
Press once
Tap the button. A soft light confirms the ions are flowing.
Ions go to work
Negative ions spread through the room and bond with odor molecules.
Odor breaks down
Ammonia and sulfur compounds break apart, and dust and dander settle out of the air.
Leave it running
Halo runs 24/7 on about a watt. Rinse the dust screen now and then.
Plug it in
Place Halo near the litter box, in an outlet or wall-mounted above it.
Press once
Tap the button. A soft light confirms the ions are flowing.
Ions go to work
Negative ions spread through the room and bond with odor molecules.
Odor breaks down
Ammonia and sulfur compounds break apart, and dust and dander settle out of the air.
Leave it running
Halo runs 24/7 on about a watt. Rinse the dust screen now and then.
30-Day Odor-Free Guarantee
Try Halo for a month. If your home still smells like litter, return it for a full refund. No forms, no back and forth.
CLAIM THE OFFER
100% Satisfaction
Fast Shipping
Easy Returns
30-Day Odor-Free Guarantee
Try Halo for a month. If your home still smells like litter, return it for a full refund. No forms, no back and forth.
CLAIM THE OFFER
100% Satisfaction
Fast Shipping
Easy Returns
Frequently Asked Questions
Everything you need to know about Halo.
How does Halo remove litter smell?
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It releases negative ions that bond with the ammonia and sulfur compounds behind litter odor and break them down in the air. It does not cover the smell with scent.
How much space does one unit cover?
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Each Halo covers a room up to 10 m², about 108 sq ft. For a multi-room home or more than one cat, run one unit in each room the cat uses.
Is it safe and quiet around cats?
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Halo draws about 1 watt, stays under 36 dB, and has no heat or moving parts. Nothing is sprayed into the room.
Do I ever replace a filter?
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No. There are no consumable filters. The small dust screen rinses clean under water.
Wall plug or USB?
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Choose the wall-plug version for a fixed spot near the litter box. Choose the USB version when you need more placement flexibility.
What if it does not work for me?
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You have 30 days. If your home does not smell fresher, send it back for a full refund.
How much space does one unit cover?
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Each Halo covers a room up to 10 m², about 108 sq ft. For a multi-room home or more than one cat, run one unit in each room the cat uses.
Do I ever replace a filter?
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No. There are no consumable filters. The small dust screen rinses clean under water.
What if it does not work for me?
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You have 30 days. If your home does not smell fresher, send it back for a full refund.