How often should I clean my range hood filter?
Wash a metal mesh range hood filter about every 3 months, sooner if you fry or sear often. A recirculating hood has a charcoal filter that cannot be washed; replace it every 3 to 6 months or as the manual says. Wash early if you see grease film or drips.
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By Kasra Taheri, Founder, LoclisPublished
Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.
Step by step
Read when to stop and call a pro, further down this page, before you start.
Step 1: Find out which kind you have
Look for a duct above or behind the hood or a vent outside. Ducted hoods usually have washable filters; recirculating ones usually have disposable filters.[1]
Step 2: Set a schedule
For washable metal mesh filters, plan on every 3 months, sooner if you fry or sear often.[1]
Step 3: Set a separate date for charcoal filters
For a recirculating hood, replace the charcoal filter every 3 to 6 months, or as your manual says.[1]
Step 4: Check between washes
Look at the underside of the hood and the mesh for grease film or drips, and wash early if you see them.
Step 5: Wash or replace
Wash metal mesh filters in the top rack of the dishwasher or soak in warm soapy water and scrub, then dry fully; see the cleaning guide.[1]
Step 6: Keep the hood running
Turn it on before cooking and leave it on a few minutes afterwards.[3]
About every three months, sooner if you cook greasy food
Wash a metal mesh range hood filter about every three months. For a recirculating hood, replace the charcoal filter every 3 to 6 months. Fry, sear or wok-cook often, and you will want to wash them monthly.
The Department of Energy's building science lab says the filters should be washed every 3 months.[1] Wolf's guide says its grease filters should be cleaned when the filter indicator is illuminated on the control panel, or after approximately 100 hours of operation.[2] A household that cooks one hour a day reaches 100 hours in about three months, so the two schedules line up.
Ducted and recirculating hoods differ
Which kind of filter you have changes the answer. If your range hood fan ducts or exhausts to outside the home, it is likely that the filters can be cleaned and re-installed.[1] If your range hood is non-ducted (also known as a recirculating range hood fan), the filters are likely disposable and should be replaced every 3 to 6 months.[1]
KitchenAid says the same of its recirculating filter: the charcoal filter is not washable, and it should last up to 6 months with normal use.[3] Replace it with the filter your owner's manual specifies.
Signs a filter is overdue
Do not rely only on the calendar. Wash sooner if you see any of these:
- Grease droplets or a sticky film on the underside of the hood.
- A hood that no longer clears smoke or cooking smells as it used to.
- Dark, shiny or dripping mesh when you look at it.
- A filter indicator light, on hoods that have one.
If your home or kitchen smells like cooking or grease all the time, the DOE lab says the filter may need cleaning or replacement.[1] A clean filter can also save energy by reducing the amount of energy the motor uses to move air.[1]
Why it matters beyond the smell
Grease on a filter is fuel. Cooking is, by far, the leading cause of home fires and home fire injuries.[4] Wolf's use and care guide tells owners to clean ventilating fans frequently, because grease should not be allowed to accumulate on fan or filter.[2] It also says to always turn hood ON when cooking at high heat.[2]
A clogged filter also strains the fan and leaves moisture, smoke and odor in the kitchen. KitchenAid notes that, to avoid the buildup of grease, the filter should be cleaned often.[3]
Make it a habit
- Set a phone reminder for every three months, and one for the recirculating filter at the date you fit it.
- Write the fitting date on the new charcoal filter with a marker where it will not show.
- Turn the hood on before you start cooking and leave it running a few minutes afterwards. KitchenAid says to start the hood before cooking and allow it to operate several minutes after the cooking is complete.[3]
- Never run the hood without its filters. Wolf's guide says: do not operate the ventilation hood without the grease filters.[2]
For how to do the washing itself, see how to clean a greasy range hood filter.
Stop and call a pro if
- The filters are clean and the hood still moves little air. The cause may be a blocked or crushed duct, the fan wheel or the motor. See why a range hood fan is not working.
- Grease drips from the hood body or duct joints. The grease has gone past the filters, and the fan housing and duct need professional cleaning.
- You smell burning or the fan hums but does not turn. Switch the hood off and have it looked at. Wolf's guide says all service should be performed by a qualified technician unless the guide recommends otherwise.[2]
- The hood needs wiring, a new duct or a new fan. In Virginia, "Tradesman" means any individual who engages in, or offers to engage in, work for the general public for compensation in the trades of electrical, plumbing and heating, ventilation and air conditioning.[5]
Getting help in Virginia
If an old hood needs more than a clean, read what range hood repair costs in Virginia and whether to repair or replace it. Browse range hood repair, appliance repair and more appliance repair answers.
When you are ready, describe the hood problem once and local businesses quote it.
Common questions
- How often should I clean a range hood filter if I cook every day?
- The Department of Energy's building science lab says every 3 months. With daily frying or searing, check monthly and wash when you see a greasy film. Wolf's guide gives about 100 hours of operation as a benchmark.
- How often should I replace a charcoal range hood filter?
- The Department of Energy's lab says filters on a recirculating hood are likely disposable and should be replaced every 3 to 6 months. KitchenAid says its charcoal filter should last up to 6 months with normal use, and that it is not washable.
- Can I run my range hood without the filters?
- No. Wolf's guide says not to operate the ventilation hood without the grease filters. Without them grease coats the fan and the duct, which is harder to clean and raises the fire risk.
- Does a dirty range hood filter use more electricity?
- The Department of Energy's lab says a clean or new filter can save energy by reducing the amount of energy the motor uses to move air.
- Do I need to clean the duct as well as the filter?
- The filter catches most grease, but if the hood still moves little air after the filters are clean, or grease drips from the hood or its joints, have a technician look at the fan and duct.
Sources
- [1] Clean or Replace Range Hood Filter, Building America Solution Center, Pacific Northwest National Laboratory, U.S. Department of Energy. Checked October 28, 2026.
- [2] Wolf ventilation hood use and care guide (international products), Wolf Appliance, Inc.. Checked October 28, 2026.
- [3] Vent Hood Not Removing Smoke or Odor, KitchenAid Product Help. Checked October 28, 2026.
- [4] Cooking Fire Safety, U.S. Fire Administration, FEMA. Checked October 28, 2026.
- [5] Va. Code § 54.1-1128. Definitions (Tradesmen), Code of Virginia, Virginia General Assembly. Checked October 28, 2026.
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