Will an air purifier alone get rid of the restaurant grease smell?

It helps but won't finish the job by itself. Make sure it's a HEPA plus activated-carbon unit, since carbon is the part that captures odor molecules. A purifier handles airborne smell while it's running, but it can't pull grease and odor out of drywall, cabinets, or fabric that's already absorbed it. For that you need surface cleaning and treatment.

Is it safe to stay in my apartment during the odor treatment?

Yes. Our methods are green and non-toxic, so they're safe around your kids, pets, and electronics. We use hydroxyl generators that are designed to run in occupied spaces, so you can stay put during the 1-4 hour treatment. We do not use ozone or chlorine gas, because both are toxic and have to clear before anyone can reenter, and we never just mask a smell. We'll always walk you through the green, non-toxic method that fits your situation.

Is the food odor through the floor my problem or the landlord's?

Usually some of both. Sealing inside your own unit is fair game for you to do or for us to handle. But unsealed building chases and an undersized restaurant exhaust are building issues, so report it to your landlord or property manager in writing. Many leases make the building responsible for keeping odors from migrating between units.

Cooking and Grease Smell From a Restaurant Below Your Apartment: How to Stop It

Food & Kitchen · By Odor Removal Experts · Updated June 2026 · Cleveland and Northeast Ohio

If you've got a restaurant cooking smell coming into your apartment from below, you already know it isn't the kind of thing a candle fixes. It shows up around the dinner rush, parks itself in your kitchen and hallway, and works its way into the couch and the curtains. We deal with this a lot in older buildings in Cleveland and in mixed-use walk-ups and co-ops around Northeast Ohio, and the cause is almost always the same handful of gaps.

The good news is that grease and food odor moving up through a floor is a path problem, not a mystery. Once you understand where it's getting in, you can cut most of it off, and we can knock out what's already soaked into your place using green, non-toxic methods that are safe for your kids, pets, and electronics.

The short answer

A restaurant cooking smell rises into your apartment through unsealed pipe chases, baseboard gaps, and the stack effect that pulls warm kitchen air upward. Seal those paths with caulk and fire-rated sealant, run a HEPA plus activated-carbon purifier, and report it to your landlord. Grease already soaked into your walls and cabinets needs professional source cleaning and treatment to fully clear.

Grease odor rides airflow through pipe chases and baseboard gaps, not solid floors.
Seal penetrations with fire-rated sealant near gas lines, standard caulk elsewhere.
HEPA plus activated-carbon purifiers grab odor molecules; HEPA alone does not.
An active kitchen below keeps sending new smell until the building fixes the exhaust.

Why the restaurant cooking smell is coming into your apartment from below

Warm air rises, and a commercial kitchen pushes out a lot of it. That smell isn't just floating up through solid concrete. It's riding airflow through real openings, and on most jobs we find the same ones.

The chase where plumbing, gas lines, and electrical conduit run between floors. These penetrations are rarely sealed tight, so they act like little chimneys.
The gap under your baseboards and around the perimeter of the room, especially in pre-war buildings where the floor and wall don't meet cleanly.
The stack effect. Your unit sits at slightly lower pressure than the heated kitchen below, so it literally pulls the air up into your space.
An undersized or poorly ducted restaurant exhaust, which spills grease-laden air into shared shafts so it finds its way back into the building instead of going out the roof.

What you can do yourself first

Before anyone spends money, seal the easy paths. This handles a surprising amount of grease smell from the downstairs restaurant on its own.

Pull your stove and fridge out and look at the floor-to-wall gap and any pipe penetrations behind them. That's the spot people miss. Run a bead of paintable acrylic-latex caulk along the baseboards and use expanding foam or fire-rated caulk around any pipes coming up through the floor. In the kitchen, fire-rated is the right call near gas lines, not standard foam.

Seal baseboard gaps and floor penetrations with caulk; use fire-rated sealant around gas and around pipe chases.
Run a HEPA plus activated-carbon air purifier in the affected room. Carbon is what actually grabs odor molecules, not HEPA alone.
Positively pressurize your unit a little by cracking a window on the opposite side of the building with a fan blowing in, so air pushes out instead of pulling up.
Tell your landlord or property manager in writing. Food odor through the floor from a restaurant is usually a building maintenance and lease issue, and the fix downstairs may be theirs to make.

When DIY won't cut it, and what we actually do

Caulk stops new smell from coming in. It does nothing for the grease film and odor already absorbed into your drywall, cabinets, soft furnishings, and the underside of the floor. That's the part homeowners can't reach, and it's why the smell lingers even after the kitchen below closes for the night.

Seal the source. We identify and seal every penetration properly so no new grease-laden air keeps arriving.
Clean the grease residue. We clean grease off the surfaces it's settled on, because grease holds odor and keeps re-releasing it.
Break the odor down. Enzymatic and oxidizing treatments break grease odor down at the source rather than mask it.
Run hydroxyl generators. These are safe to use while you stay in the apartment and neutralize the odor compounds in the air and on surfaces over several hours.
Add thermal fogging for set-in grease. For heavy grease that has soaked in, fogging carries a deodorizer into the same cracks and pores the smell traveled through.
Finish with air scrubbing. HEPA and activated-carbon scrubbing pulls the last of it out of the air.

Everything we use is green and non-toxic, and we never run ozone or chlorine gas or simply cover a smell up.

Most single-room jobs are done in 1-4 hours, same or next day. We're fully insured, and we back the work with a 100% guarantee: if the odor comes back from what we treated, we come back.

The honest caveat about an active restaurant below

Here's the part a lot of companies won't tell you. If the restaurant downstairs keeps cooking and the building never fixes the exhaust or the chase, new smell will keep arriving. Our treatment removes what's already there and our sealing slows the new stuff way down, but we can't permanently stop odor from a kitchen that's actively pumping it into a shared shaft.

That's why we pair the treatment with the sealing and, when it's warranted, a written note on what the building needs to correct downstairs. Done together, most people get their apartment back to normal and keep it that way. If the source is structural, we'll tell you straight rather than sell you a repeat treatment.