Kitchen CFM Exhaust Fan Requirements

To use the table, look at ceiling height and then cross to room width and then room length.

Cathedral ceilings provide more cubic space to the room. If the ceiling at its lowest point is 8 feet and at its highest point is 10 feet that would equate to a 2 foot variation. If the ceiling at its lowest point is 8 feet and at its highest point is 12 feet that would equate to a 4 foot variation.

The CFM on the table is a calculated amount and in most cases you will not be able to find an exhaust fan that has the exact CFM value. Treat these values as minimums and purchase the exhaust fan with the closest CFM rating above the number in this table.

This table must be used in conjunction with the EDL calculation and graph.

Table 1 - Kitchen Exhaust Fan Requirements
Kitchen Size (Feet)			CFM Of Kitchen Exhaust Fan
Height	Width	Length	Flat Ceiling	Cathedral Ceiling
Height	Width	Length	Flat Ceiling	2' Variation	4' Variation
8	8	10	160	200	240
		11	176	220	264
		12	192	240	288
		13	208	260	312
		14	224	280	336
	9	10	180	225	270
		11	198	248	297
		12	216	270	324
		13	234	293	351
		14	252	315	378
	10	10	200	250	300
		11	220	275	330
		12	240	300	360
		13	260	325	390
		14	280	350	420
	11	10	220	275	330
		11	242	303	363
		12	264	330	396
		13	286	358	429
		14	308	385	462
	12	10	240	300	360
		11	264	330	396
		12	288	360	432
		13	312	390	468
		14	336	420	504
9	8	10	180	225	270
		11	198	248	297
		12	216	270	324
		13	234	293	351
		14	252	315	378
	9	10	203	254	304
		11	223	278	334
		12	243	304	365
		13	263	329	395
		14	284	354	425
	10	10	225	281	338
		11	248	309	371
		12	270	338	405
		13	293	366	439
		14	315	394	473
	11	10	248	309	371
		11	272	340	408
		12	297	371	446
		13	322	402	483
		14	347	433	520
	12	10	270	338	405
		11	297	371	446
		12	324	405	486
		13	351	439	527
		14	378	473	567

Back to Kitchen Exhaust Fan Makeup Air - Part 1 Part 2

Back to Kitchen Exhaust Fan Performance Graph