The single most overlooked appliance in most kitchens is the one working directly above your cooktop. An over the range hood pulls smoke, grease, steam, and cooking odors out of the air, protects your cabinets from a greasy film, and improves indoor air quality more than most people realize. Choose the wrong one and you get a noisy fan that barely clears the smoke from a seared steak; choose the right one and you never think about it again.
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Having installed range hoods in kitchens of every size, I can tell you the two things that matter most are ventilation type and airflow. Let me walk you through picking the right hood.
Vented vs Recirculating: The First Decision
Every over the range hood is either ducted to the outside or recirculating, and this choice shapes everything else.
- Vented (ducted): Exhausts air, grease, and moisture completely outside through ductwork. By far the most effective option.
- Recirculating (ductless): Pulls air through charcoal and grease filters, then blows it back into the kitchen. Easier to install where no duct exists, but far less effective at removing heat and moisture.
Whenever possible, choose a vented hood. Recirculating hoods are a compromise for apartments or interior walls where running a duct outside is impractical. If you go ductless, plan to replace the charcoal filters every 3 to 6 months.
Hood Styles
Range hoods come in several mounting styles to suit different kitchens:
- Under-cabinet: Mounts beneath a wall cabinet above the range. Common and affordable.
- Wall-mount chimney: A statement hood attached to the wall with no cabinet above, often stainless steel.
- Island: Suspended from the ceiling over an island cooktop, visible from all sides.
- Microwave combo (OTR): An over-the-range microwave with a built-in vent, saving space but offering weaker ventilation.
- Insert / liner: A ventilation module built into custom cabinetry or a decorative hood surround.
Sizing the Hood to Your Cooktop
The hood should be at least as wide as the cooktop, and ideally 3 inches wider on each side to capture rising smoke that drifts outward. For a standard 30-inch range, use a 30-inch or 36-inch hood. For a 36-inch range, use a 36-inch or 42-inch hood. A hood narrower than the cooktop lets smoke escape at the edges.
Depth matters too. The hood should cover the front burners, where most steam and grease rise, so choose a model deep enough to overhang them.
CFM: Matching Airflow to Your Cooking
Airflow is measured in cubic feet per minute, or CFM, and it is the most important performance number. The right CFM depends on your cooktop’s heat output. A common rule for gas is 100 CFM for every 10,000 BTUs of burner output. For electric, plan on roughly 100 CFM per linear foot of cooktop width.
- Light cooking, electric range: 200 to 300 CFM.
- Average cooking, standard gas range: 300 to 500 CFM.
- Heavy cooking, high-BTU or professional range: 600 to 1,200 CFM.
Do not just buy the highest CFM available. Very powerful hoods, generally those over 400 CFM, can depressurize a tight, well-sealed home and require a makeup air system by code to replace the air they exhaust. Check your local code if you are considering a high-CFM hood.
Mounting Height and Duct Size
Install the hood at the manufacturer’s recommended height, typically 24 to 30 inches above an electric cooktop and 24 to 36 inches above a gas cooktop. Too high and it loses capture efficiency; too low and it interferes with cooking and can be a heat hazard.
Duct size directly affects performance. Undersizing the duct chokes airflow and makes even a powerful blower loud and ineffective. General guidelines:
- Up to 400 CFM: 6-inch round duct.
- 400 to 600 CFM: 7-inch round duct.
- 600 to 900 CFM: 8-inch round duct.
- Over 900 CFM: 10-inch duct.
Keep the duct run as short and straight as possible, use smooth rigid metal duct rather than flexible foil, and minimize elbows. Every turn reduces airflow.
Noise and Other Features
Fan noise is rated in sones, and lower is quieter. A hood rated at 1 to 3 sones on low is comfortably quiet; 6 or more sones on high is loud. Look for multiple fan speeds so you can run it quietly for simmering and crank it for searing.
Other worthwhile features include bright LED task lighting over the cooktop, dishwasher-safe stainless baffle filters that outperform mesh filters for grease capture, a delayed shut-off timer that clears lingering steam after you finish, and heat sensors that boost the fan automatically.
Cost and Installation
Pricing spans a wide range depending on style and power:
- Basic under-cabinet: $80 to $250.
- Over-the-range microwave combo: $200 to $600.
- Wall-mount chimney: $300 to $1,200.
- Island or high-end pro-style: $800 to $3,000-plus.
Installation runs $200 to $600 for a straightforward swap, more if new ductwork must be run to the exterior. Converting a recirculating setup to vented is the biggest cost driver because it involves cutting and routing a duct through the wall or roof.
Filter Types and Cleaning
The filter is what captures grease before it coats your fan and ductwork, and there are two main kinds. Baffle filters, made of overlapping stainless steel channels, force air to change direction so grease condenses and drips into a tray. They are the professional standard, highly effective, and dishwasher-safe. Mesh filters, made of layered aluminum, are cheaper but clog faster and are less efficient at trapping grease.
Whichever you have, clean the filter regularly. A greasy filter chokes airflow and becomes a fire hazard. Pull baffle or mesh filters and run them through the dishwasher or soak them in hot water with degreaser every two to four weeks depending on how much you cook. For recirculating hoods, replace the charcoal odor filter every three to six months since it cannot be washed.
Makeup Air and Code Requirements
Powerful hoods change how your whole house breathes. A hood pulling more than about 400 CFM can create negative pressure in a tightly sealed modern home, which can backdraft combustion appliances like a gas furnace or water heater and pull dangerous flue gases indoors. Many building codes now require a makeup air system, a controlled fresh-air intake that opens when the hood runs, for hoods above that threshold.
Before buying a high-CFM hood, check your local code and consider whether your home is tight enough to need makeup air. Adding a makeup air kit costs several hundred dollars but is essential for safety with a strong blower. This is one area where bigger is not automatically better, and matching the hood to your actual cooking needs avoids both wasted money and safety headaches.
Making the Right Choice
One more tip from the field: run the hood before you start cooking, not after the smoke appears. Turning it on a minute early establishes airflow so it captures fumes as they rise rather than chasing smoke that has already spread. Likewise, leave it running for a few minutes after you finish to clear lingering moisture and odors. If your hood has a delayed shut-off timer, use it. These simple habits make even a modest hood perform noticeably better and keep grease from settling on your cabinets and walls.
The best over the range hood for your kitchen is one that vents outside, spans your full cooktop width, delivers CFM matched to your cooking style, and connects to a properly sized, short duct run. Prioritize ducted ventilation and correct sizing over flashy extras, keep an eye on the sone rating so you actually want to use it, and your kitchen air will stay clear no matter what you are cooking. Make sure the duct exits the house rather than dumping into an attic or soffit, which just moves grease and moisture into your home’s structure. A well-chosen, properly installed hood protects your cabinets, your paint, and your indoor air quality for the entire life of the kitchen.
