Match the hood size to your cooktop width, not your kitchen size

The most common mistake is buying a hood that looks right above the stove but pulls air poorly. A range hood should be as wide as your cooktop — or slightly wider. If your cooktop is 30 inches, your hood should be 30 inches or wider. If it is 36 inches, go 36 inches or wider. A hood narrower than the cooking surface will miss steam and smoke at the edges.

Width matters more than the kitchen's overall size. A small kitchen with a 36-inch cooktop needs a 36-inch hood. A large kitchen with a 24-inch cooktop needs a 24-inch hood. The hood's job is to capture what rises directly above the burners, not to condition the whole room.

Key Takeaways

  • A range hood must be at least as wide as your cooktop to capture steam and smoke effectively from all burners.
  • Ducted hoods (vented outside) remove heat and moisture from your home; ductless hoods (recirculating) filter and return air indoors and work best in kitchens where ducting is difficult.
  • Airflow is measured in CFM (cubic feet per minute); most home cooks need 300 to 600 CFM, but gas cooktops and heavy cooking require 600 CFM or higher.
  • Noise level matters for daily use — look for hoods rated 50 decibels or lower if you cook frequently or have an open kitchen.
  • Installation type (under-cabinet, wall-mounted, or island) depends on your cooktop location and existing ductwork, not personal preference alone.

Decide between ducted and ductless based on your home's structure

A ducted hood (also called vented) pulls air out of your home through a duct that runs to the outside. It removes heat, moisture, and cooking odors completely. Ducted hoods are more effective and are the standard choice in most homes. The downside is that you need a clear path from the hood to an exterior wall or roof — if your cooktop is in the middle of the kitchen or far from outside walls, ducting becomes expensive or impossible.

A ductless hood (also called recirculating) filters the air through charcoal or mesh filters and pushes it back into the kitchen. It does not remove heat or moisture, so your air conditioning has to work harder in summer. Ductless hoods are easier to install because they need no ductwork, but they are less powerful at removing odors and require more frequent filter changes. Choose ductless only if ducting is truly not an option — for example, in a rental apartment or a kitchen with no exterior wall nearby.

Check the CFM rating for your cooktop type

CFM stands for cubic feet per minute and measures how much air the hood moves. Higher CFM means stronger suction. For an electric cooktop with light to moderate cooking, 300 to 400 CFM is usually enough. For gas cooktops or if you cook frequently and use high heat, aim for 600 CFM or higher. Gas burners produce more heat and moisture than electric, so they need more powerful hoods.

Do not assume a bigger CFM is always better. A hood rated for 900 CFM will be loud, use more energy, and may pull air from other parts of your home (like your furnace) if your kitchen is not well-sealed. Match the CFM to what you actually cook. If you boil pasta once a week and rarely use high heat, 400 CFM is fine. If you sear meat, fry, or cook with gas daily, go to 600 CFM or higher.

Listen to noise levels before you buy

Range hoods get loud. A hood running at full power can sound like a small airplane. If you have an open kitchen, cook frequently, or are sensitive to noise, the decibel rating matters. Look for hoods rated 50 decibels or lower — that is roughly the sound of a quiet conversation. Hoods rated 65 decibels or higher will be noticeably loud and may make it hard to talk while cooking.

Many hoods have multiple speed settings. Running at medium speed instead of high reduces noise and still handles most cooking tasks. If the hood is very quiet at low speed but deafening at high speed, you will use low speed more often and may not get the suction you need when you actually need it. Read reviews that mention noise, not just the decibel rating — real-world experience matters.

Choose an installation type that matches your cooktop location

An under-cabinet hood mounts underneath a cabinet above the cooktop. It is the most common type and works well if you have cabinetry above the stove. It is compact and does not take up much visual space. The trade-off is that it has less room for a motor, so under-cabinet hoods are often less powerful than wall-mounted or island hoods of the same width.

A wall-mounted hood (also called a chimney hood or range hood) mounts on the wall above the cooktop and extends upward. It can be more powerful because it has more room for a larger motor. Wall-mounted hoods are visible and often become a design feature of the kitchen. They work best when the cooktop is against an exterior wall, because ducting to the outside is simpler.

An island hood hangs from the ceiling above a cooktop in the middle of the kitchen. It requires ductwork to run up through the ceiling and out the roof, which is expensive and complex. Island hoods are powerful and look striking, but they are the hardest to install. Choose this type only if your cooktop is in an island and you have the budget and space for ceiling ducting.

Filter type affects maintenance and long-term cost

Most ducted hoods use either a mesh filter or an aluminum baffle filter. Mesh filters are cheaper and easier to clean — you can wash them in the dishwasher or by hand. Baffle filters are more durable and trap grease more effectively, but they cost more to replace. Both types need cleaning every month or two if you cook frequently, or every three to six months if you cook lightly.

Ductless hoods use charcoal filters in addition to a mesh or baffle pre-filter. The charcoal filter absorbs odors and cannot be cleaned — it must be replaced every three to six months, which adds to the cost of ownership. If you choose a ductless hood, factor in the cost of replacement filters before you buy.

Compare features that affect daily use

Most range hoods have basic controls — a power button and speed settings. Some have additional features worth considering. A delay-off timer lets the hood run for a few minutes after you turn off the stove, clearing remaining steam. A sensor-activated mode turns the hood on automatically when it detects heat or moisture, though these sensors are not always reliable. LED lighting is standard and uses less energy than older halogen bulbs.

Stainless steel is the most common finish and resists fingerprints better than painted metal. Glass or tempered glass panels on some hoods look modern but show dust and grease more easily. Choose a finish you are willing to clean regularly. If you have a small kitchen or low ceilings, a low-profile hood takes up less vertical space. If you have a high ceiling or large kitchen, a taller hood looks more proportional.

Frequently Asked Questions

Can I install a range hood myself, or do I need a professional?

Under-cabinet hoods are often a straightforward DIY job if you have basic tools and the electrical outlet is already in place. Wall-mounted and island hoods, especially ducted ones, usually require professional installation because they involve ductwork, ceiling work, or running new electrical lines. If you are unsure, hire a professional — a poorly installed hood will not work well and may create safety issues.

What is the difference between a range hood and a microwave with a built-in hood?

A microwave hood is a microwave oven with a small hood built into the bottom. It saves counter space but is much less powerful than a dedicated range hood and works best for light cooking. If you cook frequently or use high heat, a dedicated hood is more effective. A microwave hood is a compromise for small kitchens where space is limited.

Do I need a hood if I have a gas cooktop?

Yes, especially with gas. Gas burners produce more moisture and heat than electric, and they release combustion byproducts into the air. A hood removes these byproducts and the extra moisture. Without a hood, your kitchen will be hotter and more humid, and cooking odors will linger longer. A ducted hood is strongly recommended for gas cooktops.

How do I know if my ductwork is the right size?

Ductwork should match the hood's outlet size — usually 6 or 8 inches in diameter. Undersized ductwork reduces airflow and makes the hood work harder and louder. Oversized ductwork is wasteful but does not hurt performance. If you are replacing an old hood with a new one, check that the existing duct is the right size for the new hood before installation.

Can I use a ductless hood if I have a gas cooktop?

Technically yes, but it is not ideal. Ductless hoods filter odors but do not remove the heat and moisture that gas produces. Your air conditioning will work harder, and the kitchen will feel warmer and more humid. A ducted hood is much better for gas cooking. Use a ductless hood only if ducting is impossible.