Match the hood size to your cooktop width

A kitchen hood should be at least as wide as your cooktop, and ideally 1 to 3 inches wider on each side. If your cooktop is 30 inches wide, look for a hood between 30 and 36 inches. A hood that is too narrow will not capture steam and cooking odors effectively, even if the fan is powerful. A hood that is much wider than your cooktop wastes energy and money.

Measure the width of your cooktop first, then check the hood's dimensions before you buy. The hood's width is usually listed in the product specifications. If you are replacing an existing hood, you can measure the opening in your cabinet or wall to see what size will fit in that space.

Key Takeaways

  • Your hood should match your cooktop width plus 1 to 3 inches on each side to capture steam and odors without wasting energy.
  • Ducted hoods vent air outside and work better in most kitchens, while ductless hoods filter and recirculate air indoors and work only if you cannot run ductwork.
  • A hood's power is measured in CFM (cubic feet per minute); most home kitchens need 300 to 600 CFM, depending on your cooktop type and cooking style.
  • Island and wall-mounted hoods have different installation requirements and costs, so check your kitchen layout before deciding on a style.
  • Noise level matters for daily comfort; look for hoods rated 60 decibels or lower if you cook often or have an open kitchen.

Decide between ducted and ductless based on your kitchen layout

A ducted hood vents cooking air outside through ductwork, usually through your roof or an exterior wall. Ducted hoods remove heat, moisture, and odors completely, which is why they perform better than ductless models. If you have access to the attic or exterior wall space, and your building allows it, a ducted hood is the stronger choice.

A ductless hood (also called recirculating) filters the air through charcoal or mesh filters and pushes it back into your kitchen. Ductless hoods are easier to install because they do not require ductwork, and they cost less upfront. However, they do not remove moisture, so they are less effective in kitchens where you cook frequently or use high heat. Ductless hoods also require regular filter replacement, which adds to the cost over time.

If you rent, live in a condo with shared walls, or cannot run ductwork to the outside, a ductless hood may be your only option. If you own your home and can run ductwork, a ducted hood will serve you better in the long run.

Choose a CFM rating that matches your cooking habits

CFM stands for cubic feet per minute and measures how much air the hood moves. A higher CFM means the hood can clear steam and odors faster. Most home kitchens need between 300 and 600 CFM. Electric cooktops typically need 300 to 400 CFM, while gas cooktops need 400 to 600 CFM because they produce more heat and moisture.

If you cook with high heat often, use multiple burners at once, or have an open kitchen that connects to living spaces, aim for the higher end of that range. If you cook occasionally or have a closed-off kitchen, a lower CFM will work. Oversizing the CFM wastes energy and creates unnecessary noise, so do not assume that a more powerful hood is always better.

Check the hood's product sheet for its CFM rating. Some hoods list different CFM numbers for different fan speeds, so look at the maximum CFM to understand what the hood can do at full power.

Pick a mounting style that fits your kitchen design

Wall-mounted hoods attach to the wall above your cooktop and are the most common type. They are straightforward to install if your cooktop is against an exterior wall where you can run ductwork outside. Wall-mounted hoods come in many styles and price ranges, from basic to high-end stainless steel.

Island hoods hang from the ceiling above a cooktop in the middle of your kitchen. Island hoods cost more to install because ductwork must run through the ceiling and roof, and they require more powerful fans to work effectively. However, they look striking and work well in open-concept kitchens. If your cooktop is on an island, an island hood is your main option, though some people use a downdraft hood instead.

Under-cabinet hoods fit inside the cabinet space above your cooktop and take up less visual space. They are a good choice if you want a low-profile look, but they tend to be less powerful than wall-mounted hoods of the same size.

Downdraft hoods pull air down and away from the cooktop rather than up. They work best with gas cooktops and are less effective than traditional hoods, but they are an option if you cannot install a traditional hood above your cooktop.

Check the noise level if you spend time in the kitchen

Kitchen hoods produce noise when the fan runs, and that noise can be annoying if you cook often or have an open kitchen. Noise is measured in decibels (dB). A hood rated at 60 dB or lower is quiet enough for most people. Hoods rated above 70 dB can be loud and distracting.

Ductless hoods tend to be quieter than ducted hoods because the air does not travel as far. However, some high-powered ducted hoods are designed to run quietly by using larger ducts and better insulation. If noise matters to you, read customer reviews and check the decibel rating before you buy.

Look at filter type and maintenance needs

Ducted hoods usually have a mesh filter that traps grease. Mesh filters are washable and reusable, so you just need to clean them every month or two depending on how much you cook. Some mesh filters can go in the dishwasher, which makes cleaning easier.

Ductless hoods use charcoal filters in addition to a mesh filter. The charcoal filter removes odors, but it cannot be cleaned and must be replaced every 6 to 12 months. Charcoal filters cost between $20 and $60 per replacement, depending on the hood model. If you cook frequently, you may need to replace them more often.

Before you buy a ductless hood, check the cost and availability of replacement filters for that specific model. Some brands have filters that are hard to find or expensive, which can make the hood costly to own over time.

Compare materials and finishes for durability and style

Most kitchen hoods are made from stainless steel, painted steel, or glass. Stainless steel is durable and hides fingerprints well, but it can show water spots and requires regular polishing to look shiny. Painted steel is less expensive and comes in many colors, but it can chip or scratch over time. Glass panels look modern and sleek, but they show grease splatters and fingerprints easily and require frequent cleaning.

Think about how much time you want to spend cleaning your hood. If you cook often and do not want to polish stainless steel regularly, a painted hood or one with a matte finish may be a better choice. If you want the hood to look polished and new, stainless steel is worth the extra maintenance.

Frequently Asked Questions

What size hood do I need for a 36-inch cooktop?

A 36-inch hood is the minimum, but a 42-inch hood is better because it extends 3 inches beyond the cooktop on each side. This wider coverage captures more steam and odors. If you have space and budget, go with the 42-inch size.

Can I install a ductless hood if I already have ductwork?

Yes, you can install a ductless hood even if ductwork exists. However, if the ductwork is already in place and accessible, a ducted hood will perform better and is usually worth the extra cost. You would only choose ductless if you prefer the lower installation cost or want to avoid opening walls or ceilings.

How often do I need to clean the mesh filter?

Clean the mesh filter every month if you cook daily, or every two to three months if you cook a few times a week. A greasy filter reduces airflow and makes the hood less effective. Most mesh filters can be washed by hand or in the dishwasher.

Is a more powerful hood always better?

No. A hood that is too powerful for your space will be loud, waste energy, and may create drafts that affect your heating or cooling. Match the CFM to your cooktop type and cooking habits rather than buying the highest CFM available.

What is the difference between a range hood and a cooktop hood?

A range hood is designed to work with a range (a cooktop and oven combined), while a cooktop hood works with a cooktop alone. Both function the same way, but a range hood may be sized differently to fit over a range unit. The sizing and installation process is the same.