Range Hood Basics: How Much CFM Do I Need?

Chapters:
0:00 - Intro
0:08 - Gas Ranges vs Electric Ranges vs Grills/BBQs
1:16 - Minimum CFM
1:46 - Kitchen Size
3:04 - Ductwork
3:49 - Cooking Routine
4:29 - What Range Hood Do I Need?

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[teresalanum]

My kitchen is open concept. How do you adjust the measurements for the cubic feet of the area?

[davidunderwood]

400 CFM is all you want in a home. Anything higher, my HVAC guys told me, not only do you need make up air, but it also needs to be controlled together so you would need a make-up air unit that automatically brings more makeup air in when the hood gets turned on. They said we can do it, but it starts getting complicated. It's just code and they will enforce it if there is an inspection.

[caravann]

My kitchen is small 10x8 with floor to ceiling cabinets on both 10 foot walls pretty much, so that leaves the actual free air space much smaller almost half .should I use the full room calculation?I have a high output gas monogram range

[MarkieUnit]

The best and fastest way I've found is 300 CFM per linear foot

[randyvyskocil]

Where did the 15 air exchanges per hour number (rule?) come from? Can you reference an IRC document or some other literature?

[williamknox]

How about telling everyone about the makeup air requirement for any hood that exhausts more than 400 CFM??

[rader]

Sorry, I don’t understand.

You say to compare the minimum CFM required by the range (500) vs, the CFM needed for the kitchen space (567) and take the larger of the two.

At 2:59, where did the 360 CFM come from?

[khoatravels]

All this math…long story short, the more cfm the better, minimum is 400 cfm as it seems.

[juansaladzar]

It’s 869 cfm but you said 889 cfm so now idk what to believe brah 🤷