Can I use a smaller hood for an electric stove than for a gas stove?

Yes. Electric cooktops produce no combustion gases, so the CFM requirement is lower. A 30-inch electric range typically needs about 250-300 CFM, while a comparable gas range may need 400-600 CFM. The width rule, however, stays the same: the hood should be at least as wide as the cooktop, and preferably wider.

What is the best hood width for a 30-inch electric range?

A 30-inch hood meets the minimum requirement, but a 36-inch hood is recommended. The extra 3 inches on each side captures steam and smoke more effectively, especially when cooking with multiple pots on a large cooktop. The price difference between a 30-inch and 36-inch hood is often modest.

Do induction cooktops need a different hood size than radiant electric?

The width and CFM calculations are the same. Induction heats pans directly and the cooktop surface stays cooler, so there is less radiant heat and less residual heat after cooking. However, steam from boiling water and grease from searing are identical, so the hood sizing rules do not change.

How high should a range hood be above an electric stove?

Mount the bottom of the hood 20 to 24 inches above the cooking surface. This is lower than the 24 to 30 inches recommended for gas stoves because electric cooktops emit less upward heat. A lower mount improves capture efficiency and allows you to use a slightly lower CFM rating.

Kitchen Hood Size for Electric Stove: A Stage-by-Stage Sizing Guide

Stage 1: Measure Your Electric Cooktop's True Cooking Surface

Start with the physical width of your electric cooktop or range, measured edge to edge across the front. For a drop-in cooktop, this is the outer rim of the unit. For a freestanding range, measure the full width of the appliance, not just the area between the burners.

Electric stoves, especially induction models, often have a trim that extends beyond the actual heating elements. A 30-inch electric range may have elements that only cover 24 inches of usable space. Sizing based on the full appliance width is still correct, because the hood must capture steam and grease that rises from the entire cooktop surface, including the gaps between burners.

Write this number down. It is your baseline for every subsequent decision. Most residential electric cooktops fall into three common widths: 24, 30, and 36 inches. This measurement alone will determine the minimum acceptable hood width.

24-inch cooktop: common in small kitchens and apartment-style layouts
30-inch cooktop: the standard for most modern homes and builders
36-inch cooktop: typical for larger kitchens or those with a professional-style range

Stage 2: Add the Overhang Rule for Proper Capture

A hood that is exactly the same width as the cooktop will work, but it will not be efficient. Heat and steam rise in a cone shape, spreading outward as they travel upward. If the hood is the same size as the stove, the outer edges of the cooking plume can escape around the hood's sides.

The industry-standard rule is to select a hood that is at least as wide as the cooktop, with a strong preference for a hood that is 3 to 6 inches wider on each side. For a 30-inch electric range, that means choosing a 36-inch hood. For a 36-inch cooktop, you would move up to a 42-inch hood, though these are less common in residential catalogs.

This overhang matters more for electric stoves than for gas in one specific way: electric coils and radiant elements hold heat after you turn them off, and induction cooktops transfer heat directly to the pan, creating less ambient heat. The wider hood still helps capture the residual steam from boiling pots, which is the main byproduct of electric cooking.

Cooktop Width	Minimum Hood Width	Recommended Hood Width
24 inches	24 inches	30 inches
30 inches	30 inches	36 inches
36 inches	36 inches	42 inches (if available)

Stage 3: Calculate CFM for Electric Cooking, Not Gas

The airflow rating, measured in cubic feet per minute (CFM), is where electric stoves differ most from gas stoves. Gas ranges require higher CFM to clear combustion byproducts like carbon monoxide and nitrogen dioxide. Electric cooktops produce no combustion gases, so you can size for ventilation only.

The common formula for gas stoves is 100 CFM per 10,000 BTU of burner output. For electric, use a simpler method: calculate the room volume and apply air changes. A typical kitchen needs the hood to move the room's air about 15 times per hour. For a 10-by-12-foot kitchen with 8-foot ceilings, that is 960 cubic feet, meaning you need at least 240 CFM.

A more practical rule for electric cooktops: 100 CFM per 12 inches of cooktop width. A 30-inch electric range needs 250 CFM, and a 36-inch cooktop needs 300 CFM. These figures are lower than gas recommendations because you are only moving steam, smoke from burnt food, and cooking odors, not combustion exhaust. If you do a lot of high-heat searing in a pan, add 50 CFM to the total.

Steam rising from a pot on a flat electric ceramic cooktop

Stage 4: Match Duct Size and Ventilation Type to Your CFM

Once you have a CFM target, the ductwork becomes the limiting factor. A 6-inch round duct handles up to about 400 CFM. A 7-inch duct manages up to 600 CFM, and an 8-inch duct is needed for 600 to 900 CFM. If your calculated CFM exceeds what your existing duct can handle, the hood will be noisy and ineffective, regardless of the fan rating.

For electric stoves, a ducted hood that vents outside is always more effective than a recirculating hood with charcoal filters. Recirculating hoods reduce CFM effectiveness by roughly 30 to 40 percent because the air must pass through filters and be pushed back into the room. If you are stuck with a recirculating model, increase your CFM target by 50 percent to compensate.

Check your home's construction before buying. If you are installing a new duct, a straight, short run with minimal elbows is best. Every 90-degree elbow reduces airflow by about 10 percent. For a 300 CFM hood, a single elbow is fine, but two elbows mean you should size up to a 7-inch duct to maintain performance.

Stage 5: Verify Mounting Height and Noise Levels Before Purchase

Mounting height for a hood over an electric cooktop is slightly different from gas. Because electric cooktops produce less upward heat, you can mount the hood lower and still be safe. The standard clearance is 20 to 24 inches from the bottom of the hood to the cooking surface for electric, compared to 24 to 30 inches for gas. A lower mount improves capture efficiency, so you may not need as much CFM.

Noise is measured in sones. A hood rated at 3 sones is quiet enough for conversation; 6 sones is noticeably loud; above 8 sones is disruptive. Higher CFM generally means more noise, but a well-designed 300 CFM hood can be quieter than a poorly designed 250 CFM model. Check the sone rating at the highest fan speed, not just at the lowest.

Before you finalize, confirm that the hood's electrical requirements match your kitchen wiring. Most hoods plug into a standard 120-volt outlet, but some high-CFM models need a dedicated 15-amp circuit. This is a simple check that prevents a frustrating installation day. If you are replacing an existing hood, measure the current duct opening and the height of the existing vent cap to avoid redoing the roof or wall penetration.