Wind-Driven Ventilators | McMaster-Carr

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Base Diameter

Airflow @ Wind Speed

1,000 ft³/min @ 4 mph

1,200 ft³/min @ 4 mph

1,700 ft³/min @ 4 mph

2,350 ft³/min @ 4 mph

2,700 ft³/min @ 4 mph

4,000 ft³/min @ 4 mph

Material

RoHS

REACH

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Height

Base Width

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Outlet Diameter

Base Type

Overall Height

Thickness

For Roof Pitch

132 Products

Wind-Driven Roof-Mount Exhaust Fans

Designed to spin freely with the slightest breeze, these fans create a vacuum that draws air out from buildings and ventilation systems—no electricity required. They are also known as turbine ventilators. Mount fans on your roof away from wind obstructions.

	Overall Ht.	Airflow @ Wind Speed	Thk.	Max. Temp., ° F		Each
Galvanized Steel



	6"	14 1/2"	145 ft³/min @ 4 mph	0.018"	150	1992K12	0000000


	8"	15 1/2"	255 ft³/min @ 4 mph	0.018"	150	1992K14	000000
	10"	16 3/4"	425 ft³/min @ 4 mph	0.018"	150	1992K16	000000
	12"	17 1/4"	630 ft³/min @ 4 mph	0.024"	150	1992K17	000000
	14"	20"	700 ft³/min @ 4 mph	0.024"	150	1992K18	000000
	16"	22 1/2"	950 ft³/min @ 4 mph	0.024"	150	1992K21	000000
	18"	24"	1,200 ft³/min @ 4 mph	0.024"	150	1992K22	000000
	20"	24 1/2"	1,700 ft³/min @ 4 mph	0.024"	150	1992K23	000000
	24"	29 1/2"	2,350 ft³/min @ 4 mph	0.024"	150	1992K24	000000
	30"	32"	2,700 ft³/min @ 4 mph	0.03"	150	1992K25	000000
	36"	38"	4,000 ft³/min @ 4 mph	0.03"	150	1992K27	000000


	Stainless Steel



			6"	14 1/2"	110 ft³/min @ 4 mph	0.018"	150	1992K43	000000


			8"	15 1/2"	195 ft³/min @ 4 mph	0.018"	150	1992K45	000000
			10"	16 3/4"	305 ft³/min @ 4 mph	0.018"	150	1992K47	000000
			12"	17 1/4"	440 ft³/min @ 4 mph	0.024"	150	1992K48	000000
			14"	20"	600 ft³/min @ 4 mph	0.024"	150	1992K49	000000
			16"	22 1/2"	790 ft³/min @ 4 mph	0.024"	150	1992K52	000000
			18"	24"	1,000 ft³/min @ 4 mph	0.024"	150	1992K53	000000
			20"	24 1/2"	1,200 ft³/min @ 4 mph	0.024"	150	1992K54	000000
			24"	29 1/2"	1,700 ft³/min @ 4 mph	0.024"	150	1992K55	000000

Mounting Bases


Flat Base	Straight Base

Slope Base

All bases have a square bottom, round top, and flashing to simplify installation.

To Order: For slope bases, please specify pitch: _1/12-_11/12 in increments of _1/12. To determine pitch, use an angle indicator or divide rise by run (see illustration). For instance, if your roof rises 5" in 12" of horizontal space, your pitch is _5/12.

					Flat Bases		Straight Bases		Slope Bases
Outlet Dia.	Base Wd.	Ht.	Flashing Wd.	Material		Each		Each		Each
8"	10"	10"	4"	Galvanized Steel	2003K91	000000	2003K51	000000	2003K31	0000000
10"	12"	10"	4"	Galvanized Steel	2003K92	00000	2003K52	00000	2003K32	000000
12"	14"	10"	4"	Galvanized Steel	2003K93	00000	2003K53	00000	2003K33	000000
14"	16"	10"	4"	Galvanized Steel	2003K94	00000	2003K54	000000	2003K34	000000
16"	18"	10"	4"	Galvanized Steel	2003K95	000000	2003K55	000000	2003K35	000000
18"	22"	10"	4"	Galvanized Steel	2003K96	000000	2003K56	000000	2003K36	000000
20"	24"	10"	4"	Galvanized Steel	2003K97	000000	2003K57	000000	2003K37	000000
24"	30"	12"	4"	Galvanized Steel	2003K98	000000	2003K58	000000	2003K38	000000

Mounts for Wind-Driven Roof-Mount Exhaust Fans


Flat Base	Straight Base

Slope Base

All mounts have a square bottom, round top, and flashing to simplify installation.

To Order: For slope-base mounts, please specify pitch: _1/12-_11/12 in increments of _1/12. To determine pitch, use an angle indicator or divide rise by run (see illustration). For instance, if your roof rises 5" in 12" of horizontal space, your pitch is _5/12.

						Flat Base		Straight Base		Slope Base
	Outlet Dia.	Base Wd.	Ht.	Flashing Wd.	Bottom Shape		Each		Each	Choose a Roof Pitch		Each
Galvanized Steel



		8"	10"	10"	4"	Square	2003K91	000000	2003K51	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K31	0000000


		10"	12"	10"	4"	Square	2003K92	00000	2003K52	00000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K32	000000
		12"	14"	10"	4"	Square	2003K93	00000	2003K53	00000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K33	000000
		14"	16"	10"	4"	Square	2003K94	00000	2003K54	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K34	000000
		16"	18"	10"	4"	Square	2003K95	000000	2003K55	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K35	000000
		18"	22"	10"	4"	Square	2003K96	000000	2003K56	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K36	000000
		20"	24"	10"	4"	Square	2003K97	000000	2003K57	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K37	000000
		24"	30"	12"	4"	Square	2003K98	000000	2003K58	000000	1/12 , 2/12 , 3/12 , 4/12 , 5/12 , 6/12 , 7/12 , 8/12 , 9/12 , 10/12 , 11/12	2003K38	000000