How Broan Range Hoods Work and How to Keep Yours Clean

What Broan range hoods do and why they matter for your kitchen

Broan is a manufacturer of range hoods—the ventilation units that sit above your stove and pull cooking smoke, steam, and odors out of your kitchen. When you cook, heat and moisture rise, and a range hood captures that air before it spreads through your home and settles on walls, cabinets, and food stored nearby. Broan makes both ducted models (which vent outside) and ductless models (which filter air and recirculate it back into the kitchen).

The reason this matters for food storage is that excess moisture and cooking odors can transfer to your refrigerator and the food inside it. A working range hood keeps your kitchen environment drier and cleaner, which means your fridge stays fresher longer and your stored food doesn't absorb unwanted flavors or develop mold as quickly.

Key Takeaways

• Broan range hoods pull steam and cooking odors away from your kitchen, which helps keep your refrigerator and stored food fresher.
• Ducted Broan hoods vent outside your home, while ductless models filter and recirculate air—each type requires different maintenance.
• A clogged or dirty Broan filter reduces airflow and lets cooking moisture settle in your kitchen, which can affect how long refrigerated food lasts.
• Cleaning your Broan hood's filter every one to three months prevents grease buildup and keeps the unit working at full strength.
• A properly functioning range hood reduces the humidity in your kitchen, which directly supports better refrigerator performance and food preservation.

Ducted versus ductless Broan hoods and what each one does

Broan ducted range hoods have a duct that runs from the hood to the outside of your home—usually through the roof, a side wall, or the soffit. When you turn on the hood, a fan pulls air through a metal filter, traps grease and particles, and pushes the remaining air outside. This is the most effective type because it removes moisture and odors completely rather than just filtering them.

Ductless Broan hoods (also called recirculating hoods) have a charcoal or carbon filter instead of a metal grease filter. They pull air through the filter to trap odors and some particles, then push the air back into your kitchen. These are easier to install because they don't require ductwork, but they don't remove moisture the way a ducted hood does. If you have a ductless hood, the charcoal filter needs to be replaced every three to six months, while a ducted hood's metal filter only needs cleaning.

For food storage purposes, a ducted hood is superior because it removes the steam that can condense on your refrigerator coils and reduce cooling efficiency. If you have a ductless hood, run it longer during and after cooking to pull as much moisture as possible out of the air.

How to clean a Broan metal grease filter

The metal filter in a ducted Broan hood traps grease and cooking particles. Over time, grease builds up and blocks airflow, which means the hood can't pull steam and odors out of your kitchen as well. A clogged filter also makes the motor work harder and can shorten the hood's lifespan.

To clean the filter, first turn off the hood and let it cool for a few minutes. Most Broan hoods have filters that slide or clip out from underneath the hood. Check your manual for the exact release mechanism—some filters have a handle, others have a latch on each side. Once the filter is out, hold it over a sink or trash can and use a soft brush or old toothbrush to loosen dried grease. Then soak the filter in hot water mixed with a degreasing dish soap for 10 to 15 minutes. Scrub gently with the brush, rinse thoroughly under running water, and let it air dry completely before sliding it back in.

If the filter is very greasy or hasn't been cleaned in months, you can also place it in your oven at 200°F for 10 minutes to soften the grease, then clean it the same way. Never use a dishwasher on a Broan metal filter—the high heat can warp it. Clean the filter every one to three months depending on how often you cook.

Replacing a charcoal filter in a ductless Broan hood

Ductless Broan hoods use charcoal or carbon filters that absorb odors but cannot be cleaned and reused. When the filter becomes saturated with odors and grease, it stops working and must be replaced. Most Broan ductless hoods use a standard filter size, but you should check your model number (usually on a sticker inside the hood) to order the correct replacement.

To replace the filter, turn off the hood and locate the filter cartridge—it usually sits in a frame or holder beneath the hood. Slide or unclip the old filter and note which direction it faces (charcoal side in or out). Slide the new filter in the same orientation and secure it. Broan charcoal filters typically cost between $20 and $50 depending on the model. Replacing the filter every three to six months keeps the hood working at full strength and prevents odors from recirculating back into your kitchen and onto your stored food.

Why a clean range hood helps your refrigerator stay fresh

When your Broan hood isn't working well, cooking steam and grease-laden air settle throughout your kitchen. Some of that moisture condenses on your refrigerator's exterior and can seep into the door seals and cooling vents. Excess humidity also makes its way into your fridge when you open the door, and that moisture can speed up mold growth on produce and encourage bacterial growth on other foods.

A well-maintained Broan hood removes that moisture before it becomes a problem. By keeping your kitchen drier, you're also reducing the workload on your refrigerator's dehumidifying system, which means the fridge can maintain a more stable temperature and humidity level inside. This directly extends the shelf life of fresh produce, dairy, and other perishables. If you notice your fridge is working harder than usual or frost is building up inside, a clogged range hood could be part of the reason.

Cleaning the hood housing and fan blades

The metal or plastic housing around your Broan hood and the fan blades inside also collect grease and dust. While the filter does most of the work, some particles slip through or settle on surfaces. Every three to six months, wipe down the outside of the hood with a damp cloth and mild degreaser. For the interior fan blades, turn off the hood, wait for it to cool, and carefully wipe each blade with a soft cloth dampened with degreaser. Do not spray liquid directly into the motor or electrical components.

If your hood has a light bulb, check it at the same time and replace it if it's burned out. A working light helps you see when the hood is on and reminds you to use it while cooking. Some Broan hoods also have a ductwork damper (a flap that prevents outside air from flowing back in when the hood is off). Make sure this damper moves freely and isn't stuck with grease.

Troubleshooting a Broan hood that isn't pulling air

If your Broan hood is running but not pulling steam and odors out of your kitchen, the most common cause is a clogged filter. Check the metal grease filter first—if it looks dark or feels thick with grease, clean it as described above. If the filter is clean but airflow is still weak, the ductwork itself may be blocked. Lint, grease, or debris can accumulate inside the duct, especially if it's long or has multiple bends.

You can check for a duct blockage by looking at the duct opening outside your home (if you have a ducted hood). If you see grease or lint buildup, or if the damper flap is stuck, that's your problem. Clearing a duct usually requires removing the filter and using a flexible brush or compressed air to push debris out. If you're not comfortable doing this yourself, a professional duct cleaning service can handle it. For ductless hoods, a weak pull almost always means the charcoal filter is saturated and needs replacement.

Frequently Asked Questions

Can I wash a Broan metal filter in the dishwasher?

No. High heat in a dishwasher can warp the metal filter and damage the frame. Hand wash it in hot soapy water with a soft brush, or soak it in degreaser for 10 to 15 minutes before scrubbing. Always air dry it completely before reinstalling.

How do I know if my Broan hood is ducted or ductless?

Look above your hood for a duct that runs to the outside of your home. If you see one, it's ducted. If there's no duct and the hood has a filter cartridge that looks like a cylinder or block, it's ductless. Check your manual if you're unsure—the model number is usually on a sticker inside the hood.

What should I do if my Broan hood is making noise?

A noisy hood often means the filter is clogged and the motor is working harder. Clean the metal filter first. If noise continues, the fan blades may have grease buildup or the motor bearings may need lubrication. Consult your Broan manual for lubrication points, or contact Broan customer service for your specific model.

Does a ductless Broan hood remove moisture from my kitchen?

No, not effectively. Ductless hoods filter odors and some particles but recirculate the air back into your kitchen, so moisture stays inside. A ducted hood is much better for removing steam. If you have a ductless hood, run it longer during cooking and consider using a separate dehumidifier in your kitchen during humid months.

How often should I replace the charcoal filter in my ductless Broan hood?

Every three to six months, depending on how often you cook. If you cook daily or fry frequently, replace it every three months. If you cook occasionally, every six months may be enough. When odors start coming back even with the hood running, it's time to replace the filter.