Automatic Louvers | McMaster-Carr

	For Opening Width For Opening Width

	Mount Style Mount Style


Surface	Flush	Recess

	For Opening Height For Opening Height

	Frame Material Frame Material

	Mounting Location Mounting Location

Wall

Roof

	Overall Width Overall Width

	Overall Height Overall Height

	Overall Depth Overall Depth

	Blade Material Blade Material

Aluminum

Stainless Steel

Plastic

	Louver Panel Style Louver Panel Style

Single

Double

Triple

	Maximum Temperature Maximum Temperature

140° F

180° F

200° F

	For Maximum Air Velocity For Maximum Air Velocity

1,200 fpm

2,000 fpm

2,500 fpm

	Frame Thickness Frame Thickness

	Minimum Temperature Minimum Temperature

	Mounting Flange Thickness Mounting Flange Thickness

	Blade Thickness Blade Thickness

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Mounting Hole Diameter Mounting Hole Diameter

1/4"

9/32"

	Overall Length Overall Length

195 Products

Heavy Duty Movable-Blade Wall Louvers

Surface-Mount Louver

Recess-Mount Louver

Flush-Mount Louver

Surface Mount

Recess Mount

Flush Mount

With a thick frame, these louvers are rugged and dependable.

Gravity-operated louvers stay open only when air flows, which prevents backdrafts.

For technical drawings and 3-D models, click on a part number.

Gravity Operated

For Opening		Overall					Mounting
Wd.	Ht.	Wd.	Ht.	Louver Panel Style	For Max. Air Velocity, fpm	Temp. Range, °F	Fasteners Included	Hole Dia.	Overall Dp.		Each
Aluminum Frame and Blades
Surface Mount
10"	10"	13"	13"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
12"	12"	15"	15"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	00000
14"	14"	17"	17"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	00000
16"	16"	19"	19"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	00000
18"	18"	21"	21"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	00000
20"	20"	23"	23"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
22"	22"	25"	25"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
24"	24"	27"	27"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
26"	26"	29"	29"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
28"	28"	31"	31"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
30"	30"	33"	33"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
32"	32"	35"	35"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
34"	34"	37"	37"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
36"	24"	39"	27"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
36"	36"	39"	39"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
38"	38"	41"	41"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
40"	40"	43"	43"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
42"	42"	45"	45"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
44"	44"	47"	47"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
48"	48"	51"	51"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
50"	50"	53"	53"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
54"	54"	57"	57"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
56"	56"	59"	59"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
60"	60"	63"	63"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
66"	66"	69"	69"	Triple	2,500	-10° to 200°	No	1/4"	1 7/8"	0000000	000000
Recess Mount
10"	10"	13"	13"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	00000
12"	12"	15"	15"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	00000
14"	14"	17"	17"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	00000
16"	16"	19"	19"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	00000
18"	18"	21"	21"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	00000
20"	20"	23"	23"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
22"	22"	25"	25"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
24"	24"	27"	27"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
26"	26"	29"	29"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
28"	28"	31"	31"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
30"	30"	33"	33"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
32"	32"	35"	35"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
34"	34"	37"	37"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
36"	24"	39"	27"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
36"	36"	39"	39"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
38"	38"	41"	41"	Single	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
40"	40"	43"	43"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
42"	42"	45"	45"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
44"	44"	47"	47"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
48"	48"	51"	51"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
50"	50"	53"	53"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
54"	54"	57"	57"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
56"	56"	59"	59"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
60"	60"	63"	63"	Double	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
66"	66"	69"	69"	Triple	2,500	-10° to 200°	No	1/4"	1 7/8"	00000000	000000
Flush Mount
10"	10"	9 7/8"	9 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	00000
12"	12"	11 7/8"	11 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	00000
14"	14"	13 7/8"	13 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	00000
16"	16"	15 7/8"	15 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	00000
18"	18"	17 7/8"	17 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	00000
20"	20"	19 7/8"	19 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
22"	22"	21 7/8"	21 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
24"	24"	23 7/8"	23 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
26"	26"	25 7/8"	25 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
28"	28"	27 7/8"	27 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
30"	30"	29 7/8"	29 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
32"	32"	31 7/8"	31 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
34"	34"	33 7/8"	33 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
36"	24"	35 7/8"	23 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
36"	36"	35 7/8"	35 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
38"	38"	37 7/8"	37 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
40"	40"	39 7/8"	39 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
42"	42"	41 7/8"	41 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
44"	44"	43 7/8"	43 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
48"	48"	47 7/8"	47 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
50"	50"	49 7/8"	49 7/8"	Double	2,500	-10° to 200°	__	__	1 7/8"	0000000	000000
54"	54"	53 7/8"	53 7/8"	Double	2,500	-10° to 200°	__	__	1 7/8"	0000000	000000
56"	56"	55 7/8"	55 7/8"	Double	2,500	-10° to 200°	__	__	1 7/8"	0000000	000000
60"	60"	59 7/8"	59 7/8"	Double	2,500	-10° to 200°	__	__	1 7/8"	0000000	000000
66"	66"	65 7/8"	65 7/8"	Triple	2,500	-10° to 200°	__	__	1 7/8"	0000000	000000
Galvanized Steel Frame and Aluminum Blades
Surface Mount
10"	10"	13"	13"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
12"	12"	15"	15"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
14"	14"	17"	17"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
16"	16"	19"	19"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
18"	18"	21"	21"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
20"	20"	23"	23"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
22"	22"	25"	25"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
24"	24"	27"	27"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
26"	26"	29"	29"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
28"	28"	31"	31"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
30"	30"	33"	33"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
32"	32"	35"	35"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
34"	34"	37"	37"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
36"	24"	39"	27"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
36"	36"	39"	39"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
38"	38"	41"	41"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
40"	40"	43"	43"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
42"	42"	45"	45"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
44"	44"	47"	47"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
48"	48"	51"	51"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
50"	50"	53"	53"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
54"	54"	57"	57"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
56"	56"	59"	59"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
60"	60"	63"	63"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
66"	66"	69"	69"	Triple	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
Recess Mount
10"	10"	13"	13"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
12"	12"	15"	15"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
14"	14"	17"	17"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	00000000	000000
16"	16"	19"	19"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
18"	18"	21"	21"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
20"	20"	23"	23"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
22"	22"	25"	25"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
24"	24"	27"	27"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
26"	26"	29"	29"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
28"	28"	31"	31"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
30"	30"	33"	33"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
32"	32"	35"	35"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
34"	34"	37"	37"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	00000000	000000
36"	24"	39"	27"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	00000000	000000
36"	36"	39"	39"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
38"	38"	41"	41"	Single	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
40"	40"	43"	43"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
42"	42"	45"	45"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
44"	44"	47"	47"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
48"	48"	51"	51"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
50"	50"	53"	53"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
54"	54"	57"	57"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
56"	56"	59"	59"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
60"	60"	63"	63"	Double	2,500	-10° to 200°	No	1/4"	1 1/2"	0000000	000000
66"	66"	69"	69"	Triple	2,500	-10° to 200°	No	1/4"	1 1/2"	000000	000000
Flush Mount
10"	10"	9 7/8"	9 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	000000	000000
12"	12"	11 7/8"	11 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
14"	14"	13 7/8"	13 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
16"	16"	15 7/8"	15 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
18"	18"	17 7/8"	17 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
20"	20"	19 7/8"	19 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
22"	22"	21 7/8"	21 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
24"	24"	23 7/8"	23 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
26"	26"	25 7/8"	25 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
28"	28"	27 7/8"	27 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
30"	30"	29 7/8"	29 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
32"	32"	31 7/8"	31 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
34"	34"	33 7/8"	33 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
36"	24"	35 7/8"	23 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
36"	36"	35 7/8"	35 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
38"	38"	37 7/8"	37 7/8"	Single	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
40"	40"	39 7/8"	39 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	000000	000000
42"	42"	41 7/8"	41 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
44"	44"	43 7/8"	43 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
48"	48"	47 7/8"	47 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
50"	50"	49 7/8"	49 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
54"	54"	53 7/8"	53 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
56"	56"	55 7/8"	55 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
60"	60"	59 7/8"	59 7/8"	Double	2,500	-10° to 200°	__	__	1 1/2"	0000000	000000
66"	66"	65 7/8"	65 7/8"	Triple	2,500	-10° to 200°	__	__	1 1/2"	000000	000000

Movable-Blade Wall Louvers

Surface Mount

These gravity-operated louvers remain open only when air flows, preventing backdrafts.

For technical drawings and 3-D models, click on a part number.

For Opening		Overall						Mounting		Galvanized Steel Frame and Aluminum Blades
Wd.	Ht.	Wd.	Ht.	Dp.	Louver Panel Style	For Max. Air Velocity, fpm	Temp. Range, °F	Fasteners Included	Hole Dia.		Each
Surface Mount
10 1/2"	10 1/2"	13"	13"	2 1/2"	Single	2,500	-40° to 180°	No	9/32"	00000000	000000
12 1/2"	12 1/2"	15"	15"	2 1/2"	Single	2,500	-40° to 180°	No	9/32"	00000000	00000
16 1/2"	16 1/2"	19"	19"	2 1/2"	Single	2,500	-40° to 180°	No	9/32"	00000000	00000
18 1/2"	18 1/2"	21"	21"	2 1/2"	Single	2,500	-40° to 180°	No	9/32"	00000000	00000
20 1/2"	20 1/2"	23"	23"	2 1/2"	Single	2,500	-40° to 180°	No	9/32"	00000000	00000
24 1/2"	24 1/2"	27"	27"	3"	Single	2,500	-40° to 180°	No	9/32"	00000000	000000
30 1/2"	30 1/2"	33"	33"	3"	Single	2,500	-40° to 180°	No	9/32"	00000000	000000
36 1/2"	36 1/2"	39"	39"	3"	Single	2,500	-40° to 180°	No	9/32"	00000000	000000
42 1/2"	42 1/2"	45"	45"	3"	Double	2,500	-40° to 180°	No	9/32"	00000000	000000
48 1/2"	48 1/2"	51"	51"	3"	Double	2,500	-40° to 180°	No	9/32"	00000000	000000
54 1/2"	54 1/2"	57"	57"	3"	Double	2,500	-40° to 180°	No	9/32"	00000000	000000

Corrosion-Resistant Movable-Blade Wall Louvers

Surface Mount

Flush Mount

Surface Mount

Flush Mount

Use these louvers in harsh environments—they won't rust. They are gravity operated and remain open only when air flows, preventing backdrafts.

For technical drawings and 3-D models, click on a part number.

For Opening		Overall						Mounting
Wd.	Ht.	Wd.	Ht.	Dp.	Louver Panel Style	For Max. Air Velocity, fpm	Temp. Range, °F	Fasteners Included	Hole Dia.		Each
Surface Mount
304 Stainless Steel Frame and Blades
12"	12"	15"	15"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	0000000
16"	16"	19"	19"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
18"	18"	21"	21"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
20"	20"	23"	23"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
24"	24"	27"	27"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
30"	30"	33"	33"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
36"	36"	39"	39"	2 3/8"	Single	2,500	-20° to 200°	No	1/4"	0000000	000000
Flush Mount
Plastic Frame and Blades
12"	12"	11 7/8"	11 7/8"	1 3/4"	Single	1,200	5° to 140°	No	__	00000000	000000
16"	16"	15 7/8"	15 7/8"	1 3/4"	Single	1,200	5° to 140°	No	__	00000000	000000
18"	18"	17 7/8"	17 7/8"	1 3/4"	Single	1,200	5° to 140°	No	__	00000000	000000
24"	24"	23 7/8"	23 7/8"	1 3/4"	Double	1,200	5° to 140°	No	__	00000000	000000
30"	30"	29 7/8"	29 7/8"	1 3/4"	Double	1,200	5° to 140°	No	__	00000000	000000
36"	36"	35 7/8"	35 7/8"	1 3/4"	Double	1,200	5° to 140°	No	__	00000000	000000

Roof Louvers

Louver

Surface Mount

Mounting Base

These louvers are gravity operated. The blades open when your roof-mounted exhaust fan goes on and close when it's off, preventing backdrafts. The felt seal on the face of the blades ensures quiet closing and better protection from the weather.

Mounting bases are sold separately. Louvers fit the bottom of the mounting base and must be secured to the lip of the base with sheet metal screws (not included).

Also Available: Additional louver sizes. Please select 8061T999 and specify louver dimensions.

For technical drawings and 3-D models, click on a part number.

Louvers
For Opening		Overall							8" Overall Ht. Mounting Bases			12" Overall Ht. Mounting Bases
Wd.	Ht.	Wd.	Lg.	For Max. Air Velocity, fpm	Temp. Range, °F	Mounting Fasteners Included		Each	Inside Wd.		Each	Inside Wd.		Each
Surface Mount
Galvanized Steel Frame and Aluminum Blades
13 3/4"	13 3/4"	13 3/4"	13 3/4"	2,000	-40° to 180°	No	000000	000000	14 1/2"	0000000	0000000	14 1/2"	0000000	0000000
15 3/4"	15 3/4"	15 3/4"	15 3/4"	2,000	-40° to 180°	No	000000	00000	16 1/2"	0000000	000000	16 1/2"	0000000	000000
17 3/4"	17 3/4"	17 3/4"	17 3/4"	2,000	-40° to 180°	No	000000	00000	__	000000	00	19 1/2"	0000000	000000
19 3/4"	19 3/4"	19 3/4"	19 3/4"	2,000	-40° to 180°	No	0000000	00000	21 1/2"	0000000	000000	__	000000	00
21 3/4"	21 3/4"	21 3/4"	21 3/4"	2,000	-40° to 180°	No	0000000	00000	__	000000	00	23 1/2"	0000000	000000
23 3/4"	23 3/4"	23 3/4"	23 3/4"	2,000	-40° to 180°	No	0000000	00000	__	000000	00	25 1/2"	0000000	000000
27 3/4"	27 3/4"	27 3/4"	27 3/4"	2,000	-40° to 180°	No	0000000	00000	__	000000	00	28 1/2"	0000000	000000
34 3/4"	34 3/4"	34 3/4"	34 3/4"	2,000	-40° to 180°	No	0000000	000000	35 1/2"	0000000	000000	35 1/2"	0000000	000000
36 3/4"	36 3/4"	36 3/4"	36 3/4"	2,000	-40° to 180°	No	0000000	000000	__	000000	00	37 1/2"	0000000	000000