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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”.
How do you size a range hood vent?
To power your range hood, you need at least 100 CFM for every 10,000 BTUs of your stovetop. For example, a 100,000 BTU stove needs at least a 1000 CFM range hood. For electric stoves, multiply the stove width by 10. So, for a 42” electric stove you want a range hood with at least 420 CFM.
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.
What is code for venting range hood?
Is a range hood required by code in California? 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.
What size range hood requires make up air?
New building codes require what is called “make-up air” to be installed when a kitchen ventilation hood exceeds 400 CFM (cubic feet of air per minute). Many gas range and cooktop manufacturers recommend well over 400 CFMs for a ventilation hood especially when you exceed 4 burners on your appliance.
What size range hood do I need for a 30 range?
What size range hood do I need for a 30 inch cooktop? For a 30 inch cooktop, install a range hood that is at least 36” wide indoors and 42” wide outdoors.
What is the best height for a range hood?
Most range hood manufacturers recommend mounting your range hood between 20 and 24 inches above your kitchen range, but we recommend at least 28 inches for our professional-quality, powerful vent hoods.
Can you reduce duct size for range hood?
How do you reduce duct size? It is not recommended to reduce duct size. This may decrease the efficiency of your kitchen range hood by restricting the flow of air as it travels through your ductwork. In rare cases, only if the ductwork is several inches larger than necessary, will your ductwork need to be reduced.
Can range hood vent 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.
What is the best CFM for a range hood?
The power or air movement for range hoods is measured in cubic feet per minute (CFM). If you do a lot of heavy cooking that involves steam or strong odors, get a range hood with at least 350 CFM.
Does a range hood have to vent outside?
Range hoods do not have to be vented to the outside. You can purchase hoods without ductwork called ductless hoods. But, ducted range hoods are almost always preferred over ductless hoods.
How do you vent a kitchen without a hood?
10 Things to Do If You Don’t Have a Range Hood or Vent 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.
Is a vent hood required for a gas range?
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.
Is a kitchen exhaust fan required by code?
California requires kitchen ventilation in all new construction and remodels, and even if your local authorities don’t require it, you should address it anyway. You can satisfy most local codes by installing a range hood.
Is 400 cfm enough for 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.
Is a range hood required by code?
Most residential building codes do not require a range hood above a stove or cook top, but you’d be wise to ensure your locale is not the exception.
Can you put a 36 inch range hood over a 30 inch stove?
For example, if you have a 30” range, a 36 inch range hood is ideal. 30” is the most popular stove size in today’s kitchens, which is why our 36” hoods are so popular! For example, if you have installed cabinets that are 30” wide and your range is 30”, you don’t have space for a 36 inch hood.
Should a range hood be wider than the range?
A hood should be at least as wide as your cooking surface, but an extra 3 inches on each side can improve efficiency. A wall- or island-mount should be about 30 inches above the cooktop, while undercabinet-mounts, typically less powerful and with smaller ducts, should sit 24 inches above the range.
What size duct is needed for 1000 cfm?
Equivalent diameter for rectangular and circular ducts – air flows between 100 – 50000 cfm Air flow – q – (Cubic Feet per Minute, cfm) (m 3 /s) Rectangular Duct Sizes (inches) (mm) x (mm) 1000 (0.45) 10 x 14 12 x 12 1300 (0.59) 12 x 14 1400 (0.63) 12 x 15 1700 (0.77) 10 x 22 14 x 15.
How far should a range hood be from the stove?
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. For further information, please refer to the installation manual of your model.
How do you put ducts on a range hood?
Attach a wall or roof cap to the exterior wall or roof. Determine where you want to vent your range hood. Install your ductwork in the shortest unobstructed path to the outside of your home. Cut a hole 1-2 inches larger than your ductwork where you’ll run the duct from your hood. Attach the range hood to your ductwork.
