Louver Plates | McMaster-Carr

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157 Products

Louvers for Enclosures

Relieve heat buildup and prevent condensation from forming inside enclosures and other small spaces.

Surface Mount

Surface

Mount

Gray Powder-Coated Steel Frame and Blades—Powder-coated steel louvers are rugged and durable.

316 Stainless Steel Frame and Blades—316 stainless steel louvers are rugged and durable.

	For Opening		Overall				Mounting
	Wd.	Ht.	Wd.	Ht.	Blade Thk.	No. of Panels	Fasteners Included	Hole Dia.		Each
Gray Powder-Coated Steel Frame and Blades







				Standard Louver Collar

				1 3/4"	2"	3 1/4"	3 1/4"	0.075"	1	Yes	7/32"	0000000	000000


				3"	2 5/8"	4 1/2"	3 7/8"	0.075"	1	Yes	7/32"	0000000	00000
				3"	3 1/2"	4 1/2"	4 3/4"	0.075"	1	Yes	7/32"	0000000	00000
				4"	3 1/4"	5 1/2"	4 1/2"	0.075"	1	Yes	7/32"	0000000	00000
				4"	4 3/8"	5 1/2"	5 5/8"	0.075"	1	Yes	7/32"	0000000	00000
				6"	4 3/8"	7 1/2"	5 5/8"	0.075"	1	Yes	7/32"	0000000	00000
				6"	6 5/8"	7 1/2"	7 7/8"	0.075"	1	Yes	7/32"	0000000	00000
				8"	4 9/16"	9 1/2"	5 13/16"	0.075"	1	Yes	7/32"	0000000	00000
				8"	6 15/16"	9 1/2"	8 3/16"	0.075"	1	Yes	7/32"	0000000	00000
				8"	9 5/16"	9 1/2"	10 9/16"	0.075"	1	Yes	7/32"	0000000	00000
				8"	14 1/16"	9 1/2"	15 5/16"	0.075"	1	Yes	7/32"	0000000	00000


				316 Stainless Steel Frame and Blades







								Standard Louver Collar

								1 3/4"	2"	3 1/4"	3 1/4"	0.075"	1	Yes	7/32"	0000000	000000


								3"	2 5/8"	4 1/2"	3 7/8"	0.075"	1	Yes	7/32"	0000000	000000
								3"	3 1/2"	4 1/2"	4 3/4"	0.075"	1	Yes	7/32"	0000000	000000
								4"	3 1/4"	5 1/2"	4 1/2"	0.075"	1	Yes	7/32"	0000000	000000
								4"	4 3/8"	5 1/2"	5 5/8"	0.075"	1	Yes	7/32"	0000000	000000
								6"	4 3/8"	7 1/2"	5 5/8"	0.075"	1	Yes	7/32"	0000000	000000
								6"	6 5/8"	7 1/2"	7 7/8"	0.075"	1	Yes	7/32"	0000000	000000
								8"	4 9/16"	9 1/2"	5 13/16"	0.075"	1	Yes	7/32"	0000000	000000
								8"	6 15/16"	9 1/2"	8 3/16"	0.075"	1	Yes	7/32"	0000000	000000
								8"	9 5/16"	9 1/2"	10 9/16"	0.075"	1	Yes	7/32"	0000000	000000
								8"	14 1/16"	9 1/2"	15 5/16"	0.075"	1	Yes	7/32"	0000000	000000

Flush Mount


White Plastic Frame and Blades	Aluminum Frame and Blades	Anodized Aluminum Frame and Blades

Black Anodized Aluminum Frame and Blades	White Powder-Coated Aluminum Frame and Blades	Flush Mount

Aluminum Frame and Blades—All aluminum louvers have small openings between their blades to stop bugs from getting inside your enclosure.

Anodized Aluminum Frame and Blades—All aluminum louvers have small openings between their blades to stop bugs from getting inside your enclosure. Anodized aluminum louvers withstand corrosion better than unfinished and powder-coated aluminum louvers. They’re good for settings such as saltwater environments.

Black Anodized Aluminum Frame and Blades—All aluminum louvers have small openings between their blades to stop bugs from getting inside your enclosure. Black anodized aluminum louvers withstand corrosion better than unfinished and powder-coated aluminum louvers. They’re good for settings such as saltwater environments.

White Powder-Coated Aluminum Frame and Blades—All aluminum louvers have small openings between their blades to stop bugs from getting inside your enclosure.

Darkroom Environments—Darkroom louvers have a shield on the back that blocks out light—use them where light control is a concern.

		Overall
	For Opening Dia.	Dia.	Dp.	For Min. Wall Thk.	For Max. Wall Thk.	Blade Thk.	No. of Panels	Mounting Fasteners Included	Pkg. Qty.		Pkg.
White Plastic Frame and Blades







				Standard Louver Collar

				2"	2 1/2"	1"	1/8"	—	0.07"	1	No	1	0000000	00000


				3"	3 1/2"	1"	1/8"	—	0.07"	1	No	1	0000000	0000
				4"	4 1/2"	1"	1/8"	—	0.07"	1	No	1	0000000	0000


				Aluminum Frame and Blades







								Standard Louver Collar

								1"	1 1/4"	3/8"	1/8"	—	0.015"	1	No	12	000000	00000


								1 1/2"	1 3/4"	3/8"	1/8"	—	0.015"	1	No	12	000000	00000
								2"	2 1/2"	1/2"	1/8"	—	0.015"	1	No	12	000000	00000
								2 1/2"	3"	5/8"	1/8"	—	0.015"	1	No	1	000000	0000
								3"	3 1/2"	5/8"	1/8"	—	0.015"	1	No	1	0000000	0000
								4"	4 1/2"	3/4"	1/8"	—	0.015"	1	No	1	0000000	0000




										Tabbed Louver Collar

										1"	1 1/8"	3/8"	—	1/8"	0.015"	1	No	1	0000000	0000


										1 1/2"	1 3/4"	3/8"	—	1/8"	0.015"	1	No	1	0000000	0000
										2"	2 3/8"	1/2"	—	1/8"	0.015"	1	No	1	0000000	0000
										2 1/2"	2 15/16"	5/8"	—	1/8"	0.015"	1	No	1	0000000	0000
										3"	3 1/2"	5/8"	—	1/8"	0.015"	1	No	1	0000000	0000
										4"	4 1/2"	3/4"	—	1/8"	0.015"	1	No	1	0000000	0000


										Anodized Aluminum Frame and Blades







														Standard Louver Collar

														1"	1 1/8"	3/8"	1/8"	—	0.015"	1	No	1	0000000	0000


														1 1/2"	1 3/4"	3/8"	1/8"	—	0.015"	1	No	1	0000000	0000
2"														2 3/8"	1/2"	1/8"	—	0.015"	1	No	1	0000000	0000
2 1/2"	2 15/16"													5/8"	1/8"	—	0.015"	1	No	1	0000000	0000
3"	3 1/2"													5/8"	1/8"	—	0.015"	1	No	1	0000000	0000
4"	4 1/2"													3/4"	1/8"	—	0.015"	1	No	1	0000000	0000




		Tabbed Louver Collar

		1"	1 1/8"											3/8"	—	1/8"	0.015"	1	No	1	0000000	0000


		1 1/2"	1 3/4"											3/8"	—	1/8"	0.015"	1	No	1	0000000	0000
		2"	2 3/8"											1/2"	—	1/8"	0.015"	1	No	1	0000000	0000
		2 1/2"	2 15/16"											5/8"	—	1/8"	0.015"	1	No	1	0000000	0000
		3"	3 1/2"											5/8"	—	1/8"	0.015"	1	No	1	0000000	0000
		4"	4 1/2"											3/4"	—	1/8"	0.015"	1	No	1	0000000	0000


		Black Anodized Aluminum Frame and Blades







						Standard Louver Collar

						1"	1 1/8"							3/8"	1/8"	—	0.015"	1	No	1	0000000	0000


						1 1/2"	1 3/4"							3/8"	1/8"	—	0.015"	1	No	1	0000000	0000
						2"	2 3/8"							1/2"	1/8"	—	0.015"	1	No	1	0000000	0000
						2 1/2"	2 15/16"							5/8"	1/8"	—	0.015"	1	No	1	0000000	0000
						3"	3 1/2"							5/8"	1/8"	—	0.015"	1	No	1	0000000	0000
						4"	4 1/2"							3/4"	1/8"	—	0.015"	1	No	1	0000000	0000




								Standard Louver Collar—Darkroom Environments

								4"	4 1/2"					3/4"	1/8"	—	0.015"	1	No	1	000000	00000


								White Powder-Coated Aluminum Frame and Blades







																Standard Louver Collar

										1"	1 1/4"					3/8"	1/8"	—	0.015"	1	No	12	0000000	00000


										1 1/2"	1 3/4"					3/8"	1/8"	—	0.015"	1	No	1	0000000	0000
										2"	2 1/2"	1/2"				1/8"	—	0.015"	1	No	1	0000000	0000
										2 1/2"	2 15/16"	5/8"	1/8"			—	0.015"	1	No	1	0000000	0000
										3"	3 1/2"	5/8"	1/8"			—	0.015"	1	No	1	0000000	0000
										4"	4 1/2"	3/4"	1/8"			—	0.015"	1	No	1	0000000	0000

Weather-Resistant Louvers for Enclosures

With a gasketed sealing kit, these louvers shield your enclosure from dirt, moisture, and weather while regulating heat and stopping condensation from forming inside. All have an aluminum mesh filter that keeps out solid debris and water.

1 Panel


	Surface Mount	Replacement Louver Filters

Stainless Steel Frame and Blades—Stainless steel louvers stand up to corrosion better than powder-coated steel louvers.

	Louvers														Replacement Louver Filters
	For Opening		Overall			Mounting
	Wd.	Ht.	Wd.	Ht.	Blade Thk.	Profile	Fasteners Included	Hole Dia.	For Use Outdoors	Enclosure Rating	Certification	Includes		Each		Each
Gray Powder-Coated Steel Frame and Blades



		2 3/4"	3"	5 5/16"	5 9/16"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	000000	00000000	000000


		3 3/4"	2 7/8"	6 5/16"	5 5/16"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000
		3 3/4"	4"	6 5/16"	6 3/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000


		Stainless Steel Frame and Blades



				2 3/4"	3"	5 5/16"	5 9/16"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	000000	00000000	00000


				3 3/4"	2 7/8"	6 5/16"	5 5/16"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	000000	00000000	00000
				3 3/4"	4"	6 5/16"	6 3/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	000000	00000000	00000

2 Panels


	Surface Mount	Replacement Louver Filters

	Louvers														Replacement Louver Filters
	For Opening		Overall			Mounting
	Wd.	Ht.	Wd.	Ht.	Blade Thk.	Profile	Fasteners Included	Hole Dia.	For Use Outdoors	Enclosure Rating	Certification	Includes		Each		Each
Gray Powder-Coated Steel Frame and Blades



		5 3/4"	3 1/2"	8 5/16"	6 3/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	000000	00000000	000000


		5 3/4"	5 3/4"	8 5/16"	8 11/16"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000
		7 3/4"	3 3/4"	10 5/16"	6 5/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000
		7 3/4"	6 1/4"	10 5/16"	9"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000
		7 3/4"	8 1/2"	10 5/16"	11 3/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000
		7 3/4"	13 1/4"	10 5/16"	16 1/8"	0.07"	Surface	Yes	1/4"	Yes	NEMA 3R	CSA Certified, UL Recognized Component	One Aluminum Mesh Filter, Two Mounting Brackets	0000000	00000	00000000	00000

Wall/Ceiling Registers


One-Way Airflow	Three-Way Airflow	Four-Way Airflow	Adjustable Airflow

Surface

Mount

Direct air coming out of HVAC systems. Adjust the damper to control airflow.

Adjustable Airflow—Adjustable airflow registers have fins that can be turned to alter the airflow direction.

	For Opening		Faceplate				White Painted Steel Frame and Blade
	Wd.	Ht.	Wd.	Ht.	Mounting Profile	Mounting Fasteners Included		Each
One-Way Airflow



		8"	4"	9 3/8"	5 3/8"	Surface	Yes	00000000	000000


		10"	4"	11 3/8"	5 3/8"	Surface	Yes	00000000	00000
		12"	6"	13 3/8"	7 3/8"	Surface	Yes	00000000	00000
		14"	6"	15 3/8"	7 3/8"	Surface	Yes	00000000	00000


		Three-Way Airflow



				10"	4"	11 3/8"	5 3/8"	Surface	Yes	00000000	00000


				10"	6"	11 3/8"	7 3/8"	Surface	Yes	00000000	00000
				12"	6"	13 3/8"	7 3/8"	Surface	Yes	00000000	00000


				Four-Way Airflow



						10"	10"	11 3/8"	11 3/8"	Surface	Yes	00000000	00000


						12"	12"	13 3/8"	13 3/8"	Surface	Yes	00000000	00000
						14"	14"	15 3/8"	15 3/8"	Surface	Yes	00000000	00000
						16"	16"	17 3/8"	17 3/8"	Surface	Yes	00000000	00000


						Adjustable Airflow



								8"	6"	9 3/4"	7 3/4"	Surface	Yes	00000000	00000


								10"	6"	11 3/4"	7 3/4"	Surface	Yes	00000000	00000
								12"	4"	13 3/4"	5 3/4"	Surface	Yes	00000000	00000
								12"	6"	13 3/4"	7 3/4"	Surface	Yes	00000000	00000
								12"	8"	13 3/4"	9 3/4"	Surface	Yes	00000000	00000
								14"	6"	15 3/4"	7 3/4"	Surface	Yes	00000000	00000
								14"	8"	15 3/4"	9 3/4"	Surface	Yes	00000000	00000
								16"	4"	17 3/4"	5 3/4"	Surface	Yes	00000000	00000
								16"	6"	17 3/4"	7 3/4"	Surface	Yes	00000000	00000
								16"	8"	17 3/4"	9 3/4"	Surface	Yes	00000000	00000

Return Grilles

Painted Aluminum

Painted Steel

Cover the opening where air is pulled into your HVAC system.

	For Duct			Faceplate
	Ht.	Wd.	Color	Ht.	Wd.	Mounting Location	Mounting Fasteners Included		Each
Painted Aluminum



		6"	6"	White	7 3/4"	7 3/4"	Wall	Yes	0000000	000000


		8"	8"	White	9 3/4"	9 3/4"	Wall	Yes	0000000	00000
		10"	10"	White	11 3/4"	11 3/4"	Wall	Yes	0000000	00000
		12"	12"	White	13 3/4"	13 3/4"	Wall	Yes	0000000	00000


		Painted Steel



				6"	12"	White	7 3/4"	13 3/4"	Wall	Yes	000000	0000


				6"	14"	White	7 3/4"	15 3/4"	Wall	Yes	000000	0000
				8"	12"	White	9 3/4"	13 3/4"	Wall	Yes	000000	0000
				8"	14"	White	9 3/4"	15 3/4"	Wall	Yes	000000	0000
				10"	12"	White	11 3/4"	13 3/4"	Wall	Yes	000000	00000
				10"	14"	White	11 3/4"	15 3/4"	Wall	Yes	000000	00000
				12"	12"	White	13 3/4"	13 3/4"	Wall	Yes	000000	00000
				12"	14"	White	13 3/4"	15 3/4"	Wall	Yes	000000	00000
				14"	14"	White	15 3/4"	15 3/4"	Wall	Yes	0000000	00000
				14"	24"	White	15 3/4"	25 3/4"	Wall	Yes	0000000	00000
				16"	16"	White	17 3/4"	17 3/4"	Wall	Yes	0000000	00000


				16"	20"	White	17 3/4"	21 3/4"	Wall	Yes	0000000	00000
				20"	16"	White	21 3/4"	17 3/4"	Wall	Yes	0000000	00000
				20"	20"	White	21 3/4"	21 3/4"	Wall	Yes	0000000	00000
				24"	14"	White	25 3/4"	15 3/4"	Wall	Yes	0000000	00000
				24"	24"	White	25 3/4"	25 3/4"	Wall	Yes	0000000	00000
				30"	14"	White	31 3/4"	15 3/4"	Wall	Yes	0000000	00000

Filter-Ready Return Grilles for Drop Ceilings


Painted Steel Louvered Diffuser	Painted Steel Perforated Diffuser

Place these grilles in the grid of a drop ceiling to create return airflow to your HVAC system without a duct. Add a filter (not included) for protection against dust and debris.

		For Ceiling Tile, ft.			For Filter
	Diffuser Type	Wd.	Lg.	Color	Trade Size	Thk.	Mounting Location		Each
Painted Steel



		Louvered	2	2	White	20 × 20	1"	Ceiling	000000	000000


		Perforated	2	2	White	20 × 20	1"	Ceiling	000000	00000

Filter-Ready Return Grilles

Add a filter (not included) to these grilles for protection against dust and debris entering your HVAC system. Select a filter that matches your duct size.

	For Duct			Faceplate
	Ht.	Wd.	Color	Ht.	Wd.	For Filter Thk.	Mounting Location	Mounting Fasteners Included	Mounting Hole Dia.		Each
Painted Steel



		14"	14"	White	16 13/16"	16 13/16"	1"	Wall	No	1/4"	00000000	000000


		14"	20"	White	16 13/16"	22 13/16"	1"	Wall	No	1/4"	00000000	00000
		14"	30"	White	16 13/16"	32 13/16"	1"	Wall	No	1/4"	00000000	00000
		16"	16"	White	18 13/16"	18 13/16"	1"	Wall	No	1/4"	00000000	00000
		16"	20"	White	18 13/16"	22 13/16"	1"	Wall	No	1/4"	00000000	00000
		16"	25"	White	18 13/16"	27 13/16"	1"	Wall	No	1/4"	00000000	00000
		20"	14"	White	22 13/16"	16 13/16"	1"	Wall	No	1/4"	00000000	00000
		20"	16"	White	22 13/16"	18 13/16"	1"	Wall	No	1/4"	00000000	00000
		20"	25"	White	22 13/16"	27 13/16"	1"	Wall	No	1/4"	00000000	00000
		24"	12"	White	26 13/16"	14 13/16"	1"	Wall	No	1/4"	00000000	00000
		24"	14"	White	26 13/16"	16 13/16"	1"	Wall	No	1/4"	00000000	00000


		25"	16"	White	27 13/16"	18 13/16"	1"	Wall	No	1/4"	00000000	00000

Floor Registers


	Recessed Mount

Direct air coming out of HVAC systems. Adjust the damper to control airflow.

	For Opening		Faceplate			Brown Painted Steel Frame and Blade		White Painted Steel Frame and Blade
	Wd.	Ht.	Wd.	Ht.	Mounting Profile		Each		Each
One-Way Airflow



		10"	2 1/4"	11 3/8"	3 5/8"	Recessed	0000000	000000	0000000	000000


		10"	4"	11 3/8"	5 3/8"	Recessed	0000000	0000	0000000	0000
		10"	6"	11 3/8"	7 3/8"	Recessed	0000000	00000	0000000	00000
		12"	2 1/4"	13 3/8"	3 5/8"	Recessed	0000000	0000	0000000	0000
		12"	4"	13 3/8"	5 3/8"	Recessed	0000000	0000	0000000	0000
		12"	6"	13 3/8"	7 3/8"	Recessed	0000000	00000	0000000	00000
		14"	2 1/4"	15 3/8"	3 5/8"	Recessed	0000000	00000	0000000	00000
		14"	4"	15 3/8"	5 3/8"	Recessed	0000000	00000	0000000	00000
		14"	6"	15 3/8"	7 3/8"	Recessed	0000000	00000	0000000	00000