A grease-clogged filter is the single most common reason a range hood stops pulling smoke and steam out of the kitchen, and it is also a genuine fire risk. Keeping your Broan range hood filter clean or replaced on schedule restores airflow, cuts odors, and protects your home. Because Broan is one of the largest hood makers in North America, finding the right Broan range hood filter means matching the correct type and size to your specific model. This guide explains the filter types, how to clean them, when to replace, and how to buy the right part.
Part of our Kitchen Remodeling guide — explore the full guide →
The Two Types of Broan Filters
Broan hoods use two fundamentally different filters, and knowing which your hood has is the first step. Many hoods use both.
- Aluminum or stainless mesh grease filters: These metal-mesh panels trap airborne grease before it enters the blower and ductwork. They are reusable, you clean them, not replace them, and every ducted Broan hood has them.
- Charcoal (carbon) filters: Found in ductless (recirculating) hoods, these absorb odors and are disposable. They sit behind the grease filter and are replaced, not washed, because activated carbon loses its capacity over time.
A ducted hood that vents outside needs only clean grease filters. A ductless hood that recirculates air back into the kitchen needs clean grease filters plus fresh charcoal filters.
How to Identify Your Filter
Before buying or cleaning, look at what you have. Pull the filter out (they typically release with a small spring clip or lift-and-tilt motion) and examine it. A grid of woven or expanded metal mesh in an aluminum frame is a grease filter. A black or gray fiber pad, often round or rectangular with a dense feel, is a charcoal filter.
Note the dimensions and any part number stamped on the frame. Broan filters come in many sizes, and grease filters are commonly sold by their measured dimensions in inches. Charcoal filters are usually matched by the specific model or a Broan replacement part number. Measure length, width, and thickness precisely, since a filter that is slightly off will not seat correctly.
How to Clean an Aluminum Mesh Filter
Cleaning is far cheaper than replacing, and mesh grease filters are designed to be washed repeatedly. Here is the reliable method:
- Remove the filter by releasing the spring clip and lowering it out of the hood.
- Fill your sink with hot water and add a grease-cutting dish soap plus a couple of tablespoons of baking soda for stubborn buildup.
- Soak the filter for 10 to 15 minutes to loosen the grease.
- Scrub gently with a soft brush, working the grease out of the mesh; avoid steel wool, which damages aluminum.
- Rinse thoroughly in hot water until no soap remains.
- Dry completely before reinstalling so no moisture enters the blower.
For heavy buildup, many aluminum filters are dishwasher-safe on the top rack, though repeated dishwasher cycles can dull or discolor the aluminum. Clean grease filters every one to three months depending on how much you cook.
When to Replace vs. Clean
Grease filters are reusable, but they do not last forever. Replace a mesh grease filter when the aluminum is bent, corroded, torn, or so caked that cleaning no longer restores airflow, usually after several years of regular cleaning. A damaged frame that will not seat flush lets grease bypass the filter into the ductwork, so replace it rather than limp along.
Charcoal filters are different, they are always replaced, never cleaned. Washing a carbon filter destroys it. Replace charcoal filters every three to six months in a ductless hood, or sooner if odors linger during cooking, which signals the carbon is saturated and no longer absorbing.
Finding the Right Replacement Part
Matching the correct filter to your Broan hood prevents wasted money. Follow these steps:
- Find your model number: Look on a label inside the hood, often behind the filter or on the underside near the controls.
- Determine filter type: Ducted hoods need grease filters; ductless hoods need both grease and charcoal.
- Measure the old filter: Record length, width, and thickness in inches.
- Match the part number where available, especially for charcoal filters, which are model-specific.
- Buy genuine or quality compatible filters sized exactly to your measurements.
Grease filters commonly run $10 to $30 each, and charcoal filters run $10 to $25 per set. Buying a multi-pack of charcoal filters is cost-effective since you replace them several times a year.
Why Filter Maintenance Matters
A neglected filter does more than smell. Grease buildup restricts airflow, so the hood struggles to clear smoke and steam, and the blower motor works harder and wears faster. Worse, accumulated grease is flammable, a clogged filter directly above a cooktop is a real fire hazard. Clean filters also keep grease out of the ductwork and off your ceiling and cabinets.
For ductless hoods, a saturated charcoal filter simply stops removing odors, so the hood recirculates smelly air. Regular maintenance keeps the whole system efficient, quiet, safe, and effective. Set a reminder to check filters monthly and clean or replace on schedule based on your cooking habits.
Ducted vs. Ductless: Why It Changes Your Filters
Understanding your hood’s ventilation type is the foundation of correct filter care, because it dictates which filters you have and how you maintain them. A ducted hood connects to a duct that carries grease, smoke, steam, and odors outside the home. Because the air leaves the house, a ducted hood needs only reusable metal grease filters to protect the blower and ductwork, no charcoal required.
A ductless (recirculating) hood has no duct to the outside. Instead, it pulls air through the grease filter, then through a charcoal filter that scrubs odors, and blows the cleaned air back into the kitchen. That charcoal filter is doing the odor work the outdoor duct would otherwise handle, which is why it must be replaced regularly. If you are unsure which you have, look for ductwork above the hood or check whether the top vents outside; no duct means ductless, and you should be buying charcoal filters on a schedule.
Extending the Life of Your Filters
A few habits keep filters working longer and cut how often you replace charcoal. Always run the hood while cooking, and leave it on a few minutes afterward, so grease and moisture are captured instead of settling on cabinets and the filter frame. Cook on the correct burner size and avoid excessive high-heat frying when possible, since grease-heavy cooking loads filters fastest. Clean the metal grease filter on schedule so grease does not migrate to and clog the charcoal filter prematurely. Wipe down the hood’s interior surfaces periodically as well. These small routines mean fewer charcoal replacements per year and a grease filter that lasts many seasons before it ever needs replacing rather than cleaning.
Frequently Asked Questions
Can I clean a Broan charcoal filter instead of replacing it? No. Charcoal (carbon) filters cannot be cleaned, because washing destroys the activated carbon’s ability to absorb odors. They are disposable and should be replaced every three to six months in a ductless hood, or sooner if odors linger.
How often should I clean my Broan aluminum grease filter? Clean it every one to three months depending on how heavily you cook. Frequent frying or high-heat cooking calls for monthly cleaning, while light cooking can stretch to every three months. Soak in hot soapy water with baking soda and scrub gently.
Are Broan aluminum filters dishwasher safe? Most are dishwasher-safe on the top rack, but repeated cycles can dull or discolor the aluminum over time. Hand-washing in hot soapy water is gentler and equally effective for routine cleaning.
How do I know if my hood needs a charcoal filter? If your hood is ductless and recirculates air back into the kitchen rather than venting outside, it needs a charcoal filter for odor control. Ducted hoods that vent outdoors use only grease filters and do not need charcoal.
How do I find the right filter for my Broan model? Locate the model number on a label inside the hood, identify whether you need grease or charcoal filters, measure the old filter in inches, and match the part number where possible. Charcoal filters in particular are model-specific, so precise matching matters.
A clean Broan range hood filter is essential for a hood that actually clears smoke, controls odors, and stays safe. Wash reusable aluminum grease filters every one to three months, replace disposable charcoal filters every three to six months, and match any replacement precisely to your model and measurements. A few minutes of routine maintenance keeps your kitchen air clean and your hood working like new.
