Ewc Non-spring return Spring return
We offer over 70 EWC HVAC products, including Bypass Dampers, Damper Controls & Accessories, Rectangular Dampers, Round Dampers, and Zoning Panels.
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![EWC Controls 20X8 ND-HD 20X8 ND-HD HAND DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_hd_7f823d94-d915-4e05-8940-87a46b5cf3e8_medium.png?v=1713902448)
20X8 ND-HD | 20X8 ND-HD HAND DAMPER | EWC Controls
Brand: EWC Controls
SKU: 20X8 ND-HD
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![EWC Controls 14 URD 14 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_85cb3a3f-07b0-44fa-a2eb-0fa6256a9b1f_medium.gif?v=1713902339)
14 URD | 14 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 14 URD
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![EWC Controls 12 URD 12 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_474a01db-a5e7-4b2c-b20f-a222c16da1b0_medium.gif?v=1713902344)
12 URD | 12 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 12 URD
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![EWC Controls 10 URD 10 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_d5c80167-c8d0-4148-90ed-13ac5222ef38_medium.gif?v=1713902298)
10 URD | 10 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 10 URD
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![EWC Controls 20X12 ND Rectangular Damper | 20X12 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_672edd8d-b4fe-4c97-a644-88e14f7f487e_medium.png?v=1710946392)
20X12 ND | Rectangular Damper | 20X12 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 20X12 ND
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![EWC Controls 14 CLBD 14 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/clbd_medium.png?v=1713902406)
14 CLBD | 14 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls
Brand: EWC Controls
SKU: 14 CLBD
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![EWC Controls 16 CLBD 16 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/clbd_f0e3a8c1-99d3-4f29-a4aa-622363df401b_medium.png?v=1713902366)
16 CLBD | 16 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls
Brand: EWC Controls
SKU: 16 CLBD
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![EWC Controls 20X10 ND-HD 20X10 ND-HD HAND DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_hd_95688c75-dfb8-4ef5-aae7-2a5f32311975_medium.png?v=1713902433)
20X10 ND-HD | 20X10 ND-HD HAND DAMPER | EWC Controls
Brand: EWC Controls
SKU: 20X10 ND-HD
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![EWC Controls 4 URD 4 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_93609f5b-2e84-4b5f-accc-ef8ee96d99eb_medium.gif?v=1713902524)
4 URD | 4 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 4 URD
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![EWC Controls 16 URD 16 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_0ce76a11-9183-4e88-a173-033c8a0b9f8f_medium.gif?v=1713902360)
16 URD | 16 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 16 URD
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![EWC Controls 20X8 PRD 20X8 Rectangular Manual Bypass Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/prd_ff4b1f39-b8f5-4fdc-a853-7b6b15692504_medium.gif?v=1713902419)
20X8 PRD | 20X8 Rectangular Manual Bypass Damper | EWC Controls
Brand: EWC Controls
SKU: 20X8 PRD
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![EWC Controls 14X8 ND Rectangular Damper | 14X8 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_997fa1c0-c51a-4099-bab0-ddecd750f944_medium.png?v=1710946388)
14X8 ND | Rectangular Damper | 14X8 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 14X8 ND
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![EWC Controls 12 CLBD 12 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/clbd_de1804b7-37cd-46c2-aaa5-509e6fb471b4_medium.png?v=1713902319)
12 CLBD | 12 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls
Brand: EWC Controls
SKU: 12 CLBD
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![EWC Controls 12X12 ND Rectangular Damper | 12X12 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_1539f996-aac7-4c2b-95d7-e373fa1506a8_medium.png?v=1710946384)
12X12 ND | Rectangular Damper | 12X12 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 12X12 ND
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![EWC Controls 20 URD 20 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_2a624471-99a4-4e81-b7e7-090e1c2cb02e_medium.gif?v=1713902410)
20 URD | 20 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 20 URD
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![EWC Controls 8X14 ND Rectangular Damper | 8X14 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_3d665215-87b2-4025-90c8-6ea55e7e74ea_medium.png?v=1710946407)
8X14 ND | Rectangular Damper | 8X14 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 8X14 ND
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![EWC Controls 24X10 ND Rectangular Damper | 24X10 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_749aa006-3155-486d-bf9b-e7b0dd623ec2_medium.png?v=1710946398)
24X10 ND | Rectangular Damper | 24X10 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 24X10 ND
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![EWC Controls 18X10 ND Rectangular Damper | 18X10 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_3b6fa5e2-a20f-4144-bf5f-46d01570990c_medium.png?v=1710946381)
18X10 ND | Rectangular Damper | 18X10 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 18X10 ND
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![EWC Controls 12X8 ND-HD 12X8 ND-HD HAND DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_hd_637b2efa-1f39-45dc-b11e-5e4e6fea5064_medium.png?v=1713902318)
12X8 ND-HD | 12X8 ND-HD HAND DAMPER | EWC Controls
Brand: EWC Controls
SKU: 12X8 ND-HD
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![EWC Controls 18 URD 18 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_c01affdc-f39d-47a7-9a91-93b6d178b8d2_medium.gif?v=1713902400)
18 URD | 18 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 18 URD
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![EWC Controls 8X16 ND Rectangular Damper | 8X16 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_f7e03d06-f762-41fa-9ec7-7f67d9219ee4_medium.png?v=1710946403)
8X16 ND | Rectangular Damper | 8X16 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 8X16 ND
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![EWC Controls 24X16 ND Rectangular Damper | 24X16 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_0bc9f389-08c9-4b3d-b343-b126531864fe_medium.png?v=1710946388)
24X16 ND | Rectangular Damper | 24X16 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 24X16 ND
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![EWC Controls 18X8 ND Rectangular Damper | 18X8 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/nd_7a7d626e-fd6a-48c0-a9b0-07d51abed8fe_medium.png?v=1710946392)
18X8 ND | Rectangular Damper | 18X8 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 18X8 ND
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![EWC Controls 10 CLBD 10 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/clbd_404d2909-6ed2-4a89-a721-5d1efef61e10_medium.png?v=1713902306)
10 CLBD | 10 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls
Brand: EWC Controls
SKU: 10 CLBD
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