How do you measure for a vent hood
Andrew Campbell
Published Mar 07, 2026
Step 1: Measure the width of your cooking surface. … Step 2: Measure the width of the area between the cabinets. … Step 3: Measure the height of the space above the cooking surface. … Step 4: Measure the depth of the cooking surface.
How do I know what size vent hood to get?
Width: When possible, size the hood 6” larger in width than the cooktop. For example, if you have a 30-inch cooktop, the size of your range hood should be 36″ inches. Depth: Most range hoods come in 22-27” depths with some range hoods being 30” deep.
Does a range hood have to be the same size as the stove?
Your range hood should be six inches larger than your range. For great coverage, you can even buy a hood 12 inches larger than your range. Larger range hoods are always a great idea. With smaller hoods or hoods over electric stoves, you may be able to get by with a hood that is equal to the size of your cooktop.
How do you measure a hood?
Begin measuring from the top, either the ceiling (canopy hoods) or the underneath of the cabinet for under cabinet installations. Measure the distance from this point to your cook top, let’s call this A. Minimum range hood height = Measured distance (A) – Maximum allowed distance between hood to cooktop.What size hood do I need for a 36 inch range?
If you have a 36 inch range, you need at LEAST a 36 inch vent hood. If you have a 30 inch oven you can use a 30 inch vent hood. Get the size that is at least as large as your range.
How far above a stove should a hood be?
In general, most installations require a distance from 20″ to 24″ between the bottom of the hood and the cooking surface. Over a gas range, this distance should be between 24″ and 30″, unless otherwise specified.
Do I need a range hood for a gas stove?
Do I need a range hood for a gas stove? Yes. Gas stoves produce intense heat and smoke, so you need a kitchen fan that can vent heavy cooking exhaust outside your home. Buy a range hood that is at least 900 CFM to keep your kitchen air clean and fresh.
How do you measure a kitchen hood?
The new hood should be at least as wide as the range or cooktop and preferably 3 inches longer on each side. The most common widths are 30 and 36 inches. For optimal performance, install a hood 20 to 24 inches away from an electric cooktop and 24 to 30 inches from a gas cooktop.What is the minimum duct size for a range hood?
The minimum duct size for a range hood is 4”, which is ideal for range hoods 400 CFM and under. The higher the cubic feet per minute, the larger the duct you’ll need. At 600 CFM, the minimum duct size is 6”. At 900 CFM, the minimum duct size is 8”.
Does a range hood need to be vented outside?Range hoods do not have to be vented to the outside. … But, ducted range hoods are almost always preferred over ductless hoods. They remove all the smoke and cooking exhaust from your kitchen, while ductless hoods recirculate your cooking exhaust back into your kitchen.
Article first time published onWhat size range hood insert do I need for a 36 cooktop?
What size range hood do I need for a 36 inch cooktop? For a 36” cooktop, purchase at least a 42” indoor hood and a 48” outdoor hood.
Which brand of range hood is best?
- Best Budget: Broan-NuTone 413004.
- Best Chimney Hood on Budget: GE JVW5301SJSS.
- Best Wallmount Chimney Range Hood: Zephyr ZSPE36BS.
- Best Slide Out Range Hood: XO XOC36S.
- Best Downdraft Hood: Best D49M30SB Cattura.
How wide is a standard range hood?
Measure the width of the area over the range or cooktop. Range hoods often come in 24″, 30″ or 36″ widths. The hood should be exactly as wide as the cooking surface.
What is the code for venting a gas cooktop?
In California, vent hoods are required that produce 100 cfm or more intermittently or produce 5 air exchanges in one hour. This is required in all residential areas, remodeled homes, or areas that are 1000 square feet or larger.
How do you vent a range without a hood?
- Use a window fan. …
- Use a portable HEPA air filter. …
- Use a fan in another room, like the bathroom. …
- Get a grease splatter guard. …
- Wipe down your kitchen cabinets frequently. …
- If you paint your kitchen, use a satin or semi-gloss finish, or choose scrubbable paint.
Why does a gas stove not need to be vented?
Gas ranges do not necessarily require venting as much as electric ranges because they burn relatively clean. However, keep in mind that ventilation is used to remove heat, smoke, steam, and grease – plus the byproducts of burning gas.
Do ductless range hoods plug in?
A ductless range hood will require an electrical outlet that is dedicated to the range hood. For our purposes, we are assuming that you have had an electrician run electrical circuit wires from the circuit breaker box to the location where the outlet will be installed, behind the vertical “chimney” of the range hood.
How much space should be between cabinet and hood?
To avoid all these issues, leave a space of at least 1/2 inch between the edge of the wall-mount range hood and the cabinetry.
Can I use 4 inch duct for range hood?
Can I use 4-inch duct for a range hood? Yes, but duct size depends on the CFM of your range hood. Four-inch duct is too small for most range hoods. It is only appropriate for hoods that are rated 400 CFM or under.
How do you measure duct size?
Measure the end of a square or rectangular duct each way to determine the size. If the duct fitting inside the wall transitions to a circular duct, measure inside the circular duct from top to bottom. Repeat this at the remaining grills and ducts throughout the house.
How many CFM does a 4 inch duct have?
Reviewing the chart, a 4” pipe will convey 395 CFM at 4500 FPM. This means that a 4” pick-up on a machine will use 395 CFM from the filtering system; or, if you know that a machine will require approximately 400 CFM to remove the waste, you should use a 4” pipe for that purpose.
Is 600 cfm enough for range hood?
To vent cooking exhaust from your kitchen efficiently, we recommend a range hood with at least 600 CFM. Keep in mind that there is no ideal range hood CFM, but instead, an appropriate CFM based on your cooking style and habits in the kitchen.
Is 400 cfm enough for a range hood?
We recommend purchasing a hood that is more powerful than 400 CFM, but the casual cook might be able to get by with 400. Most 400 CFM hoods are manufactured cheaply at big box stores, so they are not very durable.
How can I tell if my range hood is ducted?
The most obvious way to determine if your range hood is ductless is whether or not you have ductwork. If you have no ductwork, your hood recirculates kitchen air. Also, if your vent hood comes with carbon filters or a recirculating kit, it is ductless.
Is it OK to vent range hood into attic?
No, you should never vent your range hood into the attic. The excess buildup of grease and moisture in your attic will ruin it and over time may cause mold damage. Instead, vent your hood through an interior wall or through the ceiling all the way outside of your home.
Can you vent a range hood through a wall?
Both under cabinet and wall range hoods can be vented on an interior wall. Venting a range hood on an interior wall may seem daunting. But, if you are comfortable DIYing it, you can save money doing the installation yourself. If not, we recommend hiring a local contractor to install the hood.
Can I install a range hood myself?
If you don’t want to hire a contractor, you can install your range hood yourself. The average homeowner should be able to install a hood by themselves. If you’re good with hands-on work around the house like installations and repairs, you should be able to mount your range hood without much trouble.
Are range hoods hard to replace?
Replacing an old range hood with a sleek new model is a fairly easy DIY project that can improve the look and functionality of your kitchen. Here’s how to go about it: Turn the power off at the circuit breaker to the existing range hood.
Are range hoods hard wired?
If your range hood came with a three-pronged plug, it does not need to be hard-wired. Just plug the hood into a wall outlet and use an extension cord if necessary. If it did not come with a three-pronged plug or it came with a cut plug, the hood needs to be hardwired. … The rest of our hoods use a three-pronged plug.
Does a gas range need a vent?
Most gas ranges in the United States do not require venting to the outside. … We recommend venting any gas range to the outside of your home. A professional-grade range hood will evacuate harmful cooking fumes, reduce cooking odors, and improve your health and safety.
How many CFM do I need?
The rule of thumb is that you need at least 1 CFM per square foot of room area. To determine the square footage of your bathroom, multiply the length times the width. For example, if your bathroom is 6 feet wide and 9 feet long, its square footage is 54. Therefore, it should have a fan rated for at least 54 CFM.