How Often Should You Clean a Residential Kitchen Hood?

Grease is the kitchen's version of lint. It builds up where you cannot see it, it accumulates faster than anyone expects, and it burns. The difference is that most people know a dryer vent needs cleaning and almost nobody has ever been told the same thing about the hood over their range.

We are Vent Pro NYC, a family-owned vent and duct cleaning company working across Brooklyn, the rest of New York City, and Deal, New Jersey. We clean residential range hoods only — more on that below, because it is a hard line rather than a footnote. This article answers the question people actually ask when they call: how often does this genuinely need to happen, and why.

The short answer

About once a year for most homes. That is the sensible default for a household that cooks a few times a week, uses the oven and the stovetop in normal proportions, and does not do a lot of high-heat frying.

Every six months if any of these describe you: you fry regularly, you cook at high heat, you cook most nights of the week, or your kitchen produces a lot of visible smoke and steam. Deep frying, searing, wok cooking, and long stovetop braises all put far more airborne grease into the hood than the same number of hours of baking does.

Now the important part. There is no code-mandated cleaning frequency for a residential range hood. Nobody is going to inspect it, no ordinance sets an interval, and any company that tells you a law requires your home hood to be cleaned on a schedule is either confusing it with the commercial rules or hoping you will not check. The reason to do it is that the hood stops working and grease is combustible — not because a code says so.

What actually happens as the grease accumulates

Your range hood works by pulling the air above the cooktop through a metal filter, past a fan, and — if it is ducted — out of the house. Everything that goes into that airstream is what was rising off the pan: steam, smoke, particulates, and vaporized fat. The fat is the problem, because it does not stay airborne. It cools and it lands.

Here is the progression, roughly in the order it becomes noticeable:

• The filters stop draining. A clean metal baffle or mesh filter is designed to catch grease and let it run down. Once the mesh is loaded, incoming grease has nowhere to go, so it sits. In bad cases it starts to drip back down onto the cooktop, which is usually the point at which someone calls us.
• The fan works harder and moves less. Airflow through a loaded filter drops. The motor is still running at the same speed, still drawing the same power, and pulling a fraction of the air it was designed to move.
• Grease migrates past the filter. This is the part that matters most and the part nobody sees. Once the filter is saturated, grease carries past it into the fan housing, coats the blower wheel, and lines the inside of the duct run behind the hood. That is a surface you cannot reach, cannot see, and cannot clean with a sponge.
• Smoke and odor stop clearing. The practical symptom. Cooking smells hang around into the next day, the smoke detector goes off over things it never used to, and the windows have to come open for a routine dinner.
• And all of it is combustible. Accumulated cooking grease sitting directly above an open flame or a hot element is fuel in the wrong place. This is not a reason to panic about your kitchen, but it is the honest reason the interval matters more than a cosmetic chore would.

The unhelpful thing about grease is that none of this has a dramatic moment. The hood does not fail. It just quietly does less every month, and because the change is gradual, the kitchen you have now feels normal.

The variables that move you off the baseline

Once a year is a starting point, not an answer. What actually determines your interval:

How you cook, not how much. A household that bakes four nights a week puts far less grease into the hood than one that pan-fries twice. Cuisines built on deep frying, high-heat wok work, tempering spices in oil, or searing meat generate substantially more airborne fat. If your cooking regularly fills the kitchen with visible haze, you are on the six-month schedule regardless of what the calendar says.

Gas versus electric. Gas burners add combustion byproducts to the airstream on top of the cooking grease, and they tend to be used at higher output. Gas kitchens generally load a hood faster than electric ones.

How many people you cook for. A family cooking full dinners nightly is a different machine than a couple who cooks on weekends. Volume compounds.

Whether the hood is ducted or recirculating. A ducted hood sends the air outside, which means the duct run is also collecting grease and also needs attention. A ductless recirculating hood filters the air and returns it to the room, which changes what needs cleaning and what needs replacing — see the next section.

The room itself. This is a Brooklyn detail worth naming. In a lot of apartments the hood sits directly over the range in a small, enclosed kitchen with poor cross-ventilation and a shared or long duct run. There is less air volume to dilute anything, the hood is doing all of the work, and what it fails to capture settles onto every surface in a room you also eat in. Small kitchens are harder on hoods than large ones.

How long it has been. If you have lived in the place for six years and never touched the hood, the first cleaning is not a maintenance visit — it is catching up. Start the annual clock after that.

Ducted, ductless, and a straight answer on charcoal filters

Find out which kind you have, because it changes the whole conversation.

A ducted hood vents outdoors through a duct run. It is the better setup for actually removing grease, smoke, and moisture from your home, and it means the duct itself is part of what gets dirty. When Vent Pro NYC cleans a ducted hood, the kitchen vent duct is included — that hidden run is exactly where the grease you cannot see ends up.

A ductless or recirculating hood pulls air through a metal grease filter, then through a charcoal filter, then blows it back into the kitchen. Very common in apartments where there is no practical path to an exterior wall.

And the straight answer people want: charcoal filters are replaced, not cleaned. They are a consumable. Running them through a dishwasher, soaking them, or baking them does not restore them — the carbon is spent, and washing it mostly just makes a mess. They generally want replacing every few months to twice a year depending on use, and the interval is in your hood's manual. Vent Pro NYC does not supply charcoal filters. Order the ones specified for your model before we come, and we will happily put the new ones in while we are there. What we clean on a ductless hood is everything else: the metal grease filter, the hood inside and out, and the fan and motor area.

What you can do yourself, and what you cannot

A fair amount of this is genuinely a homeowner job, and we would rather tell you that than sell you a visit you do not need.

You can handle:

• Degreasing the metal filters. Most reusable aluminum mesh or stainless baffle filters can go in the dishwasher on a hot cycle, or soak in very hot water with dish soap and a little baking soda, then get scrubbed with a soft brush. Do this monthly if you cook a lot, quarterly if you do not. Let them dry fully before they go back in.
• Wiping the hood exterior. A degreasing cleaner and a soft cloth on the outside of the canopy, the control panel, and the underside around the filters. Doing it while the surface is still slightly warm from cooking makes it far easier.
• Checking the light and the fan speeds actually work, which people stop noticing.

You should not handle:

• The fan and motor area. The blower wheel behind the filters is where grease quietly accumulates in a layer that a cloth cannot reach and a household cleaner will not cut. It also involves working around a motor and its wiring.
• The interior housing. The inside of the canopy above and behind the filters, including the areas around the blower opening.
• The duct run. The concealed length of duct behind the hood is the single most important part and the one no homeowner has any way to access.

That split is the actual argument for a professional visit. It is not that you cannot clean a filter — you can, and you should. It is that the three parts you cannot reach are the three that determine whether the hood still moves air.

A rhythm that works

Put together, here is a routine that keeps a home kitchen honest:

• Monthly — pull the metal filters and degrease them. Wipe down the hood exterior.
• Quarterly — do the same, plus check the underside and the edges around the filter housing for a film starting to build. If you have a ductless hood, this is when you check whether the charcoal filter is due.
• Annually — a professional cleaning that covers the filters, the hood inside and out, the fan and motor area, and the kitchen vent duct, with a sanitizing treatment at the end. Move this to every six months if you fry, cook hot, or cook most nights.

If you are already booking annual dryer vent maintenance, it is worth doing them in the same visit — the logic is identical, and we cover the dryer side in how often you should clean your dryer vent.

Residential kitchens only

This needs to be stated plainly rather than buried.

Vent Pro NYC cleans residential range hoods. We do not do commercial kitchen exhaust. In New York City, commercial and restaurant kitchen exhaust cleaning is regulated by the FDNY and must be performed by technicians holding the proper Certificate of Fitness, working for an FDNY-approved company. That is a different qualification, a different scope, and a different set of records.

If you run a food business out of your home, if your kitchen has commercial-grade cooking equipment, or if you are calling on behalf of a restaurant, deli, bakery, or cafe, we are not the right company and we would rather tell you now than at your door. Hood searches in this city are dominated by commercial operators, so a fair number of the people who find this page are looking for something we do not provide.

Everything else in this article is about the hood over the range in a home kitchen, and that is exactly what we do.

Frequently asked questions

How do I know it is overdue? Trust the symptoms over the calendar. Grease that feels tacky rather than dusty on the underside of the hood, filters that look dark and loaded when you pull one down, cooking smells that linger into the next day, a fan that sounds like it is working harder than it used to, or any grease dripping back onto the cooktop. Any one of those means it is time.

Is a law making me do this? No. There is no code-mandated cleaning frequency for a residential range hood in New York City or anywhere else we work. The commercial rules are real and strict, but they do not apply to your kitchen. The reason to clean it is performance and fire safety, not compliance.

Can I just run the filters through the dishwasher and call it done? That handles the part you can see, which is genuinely worth doing every month. It does not touch the fan housing, the interior of the canopy, or the duct — and those are where the grease that matters ends up once the filter saturates. Do the filters yourself, and let a professional get the rest annually.

My hood is ductless. Is it still worth a professional cleaning? Yes, minus the duct. The metal grease filter, the canopy inside and out, and the fan and motor area all load up the same way. The charcoal filter is the one thing that is replaced rather than cleaned, and you supply that — we will install it while we are there.

We barely cook. Can I stretch it past a year? If your kitchen is genuinely light-use, you can go longer between professional visits. Keep doing the filters yourself on a quarterly rhythm, and have the hood cleaned when the filters start looking loaded despite washing, or when you notice the fan is not clearing the room the way it used to.

Can you do the hood and the dryer vent in the same visit? Yes, and most people should. It is the same kind of maintenance on the same annual clock, and doing both at once saves you a second appointment.

Book your kitchen hood cleaning

Once a year for most homes. Every six months if you fry, cook hot, or cook most nights. Wash your own filters in between, and let somebody get the fan housing and the duct that you have no way to reach.

Vent Pro NYC cleans residential range hoods across Brooklyn, the rest of NYC, and Deal, NJ — filters degreased and reinstalled, hood cleaned inside and out, fan and motor area degreased, kitchen vent duct cleaned, and a sanitizing treatment applied, with the counters and cooktop protected and the mess taken with us. We are family-owned, licensed, and insured. Book online, read the full scope on our kitchen hood cleaning page, or call or text us at (718) 541-5567. We are open Sunday through Thursday 7am to 7pm and Friday until 3pm.