ewc
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 22X12 ND-RSD NC Rectangular Damper | 22X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f9e32a29-1358-40d7-aa10-f6c3279079e4_medium.png?v=1720000525)
22X12 ND-RSD NC | Rectangular Damper | 22X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X12 ND-RSD NC
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![EWC Controls 22X6 ND-RSD NC Rectangular Damper | 22X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_b0e271d1-2d01-4695-b794-27c95be13ead_medium.png?v=1720000492)
22X6 ND-RSD NC | Rectangular Damper | 22X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X6 ND-RSD NC
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![EWC Controls 20X18 ND-RSD NC Rectangular Damper | 20X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_c70bc79f-3b8d-4990-bf43-9935d48a20c4_medium.png?v=1720000482)
20X18 ND-RSD NC | Rectangular Damper | 20X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 20X18 ND-RSD NC
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![EWC Controls 20X14 ND-RSD NC Rectangular Damper | 20X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_82e12b1a-92bd-4439-a405-806713dd2657_medium.png?v=1720094298)
20X14 ND-RSD NC | Rectangular Damper | 20X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 20X14 ND-RSD NC
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![EWC Controls 20X6 ND-RSD NC Rectangular Damper | 20X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_633d9220-743a-4162-a0c1-a9c136640ff5_medium.png?v=1720000477)
20X6 ND-RSD NC | Rectangular Damper | 20X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 20X6 ND-RSD NC
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![EWC Controls 18X14 ND-RSD NC Rectangular Damper | 18X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_00a86510-767c-414f-ba93-d5026ab9fbda_medium.png?v=1720000468)
18X14 ND-RSD NC | Rectangular Damper | 18X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 18X14 ND-RSD NC
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![EWC Controls 18X10 ND-RSD NC Rectangular Damper | 18X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_25ecdc06-fc55-4f87-806a-0ec8d16cd0f6_medium.png?v=1720000481)
18X10 ND-RSD NC | Rectangular Damper | 18X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 18X10 ND-RSD NC
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![EWC Controls 18X6 ND-RSD NC Rectangular Damper | 18X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_97020746-7291-43e3-95aa-5b8c20b7481a_medium.png?v=1720000497)
18X6 ND-RSD NC | Rectangular Damper | 18X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 18X6 ND-RSD NC
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![EWC Controls 16X14 ND-RSD NC Rectangular Damper | 16X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_2785b0fd-3811-4035-8ada-9de8c8933d7a_medium.png?v=1720000477)
16X14 ND-RSD NC | Rectangular Damper | 16X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 16X14 ND-RSD NC
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![EWC Controls 16X12 ND-RSD NC Rectangular Damper | 16X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_d3b2ef36-c3fb-40f4-957f-e878547a32b9_medium.png?v=1720000446)
16X12 ND-RSD NC | Rectangular Damper | 16X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 16X12 ND-RSD NC
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![EWC Controls 16X6 ND-RSD NC Rectangular Damper | 16X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_e0574163-c4aa-427f-9ab2-cf159bb206a4_medium.png?v=1720000447)
16X6 ND-RSD NC | Rectangular Damper | 16X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 16X6 ND-RSD NC
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![EWC Controls 12X6 ND-RSD NC Rectangular Damper | 12X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_40f6aa37-a437-4f8d-83dc-41040f73f758_medium.png?v=1720000403)
12X6 ND-RSD NC | Rectangular Damper | 12X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 12X6 ND-RSD NC
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![EWC Controls 16X26 ND-RSD NO Rectangular Damper | 16X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_dedce76d-4cc6-4565-b156-cd63616a12af_medium.png?v=1720000472)
16X26 ND-RSD NO | Rectangular Damper | 16X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 16X26 ND-RSD NO
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![EWC Controls 16X22 ND-RSD NO Rectangular Damper | 16X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_5f7e2e32-59e8-4e9f-9eb8-d6e724a6169d_medium.png?v=1720000442)
16X22 ND-RSD NO | Rectangular Damper | 16X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 16X22 ND-RSD NO
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![EWC Controls 14X20 ND-RSD NO Rectangular Damper | 14X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_44575164-6fe7-4cc4-be81-ac324407c15e_medium.png?v=1720000423)
14X20 ND-RSD NO | Rectangular Damper | 14X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 14X20 ND-RSD NO
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![EWC Controls 12X30 ND-RSD NO Rectangular Damper | 12X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_26b5c603-642a-4138-b7f7-34558abd7d47_medium.png?v=1720000423)
12X30 ND-RSD NO | Rectangular Damper | 12X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 12X30 ND-RSD NO
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![EWC Controls 12X26 ND-RSD NO Rectangular Damper | 12X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_15448972-98e6-4bd9-a3a1-6233633f2f06_medium.png?v=1720000472)
12X26 ND-RSD NO | Rectangular Damper | 12X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 12X26 ND-RSD NO
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![EWC Controls 12X16 ND-RSD NO Rectangular Damper | 12X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_ea24645c-618c-481f-8955-b6640766ab32_medium.png?v=1720000413)
12X16 ND-RSD NO | Rectangular Damper | 12X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 12X16 ND-RSD NO
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![EWC Controls 10X24 ND-RSD NO Rectangular Damper | 10X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_8f76bcae-6401-412c-bc55-12dfb291972b_medium.png?v=1720000422)
10X24 ND-RSD NO | Rectangular Damper | 10X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X24 ND-RSD NO
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![EWC Controls 10X22 ND-RSD NO Rectangular Damper | 10X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_393f68fa-9807-48db-b00d-6032b1ec4a8f_medium.png?v=1720000375)
10X22 ND-RSD NO | Rectangular Damper | 10X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X22 ND-RSD NO
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![EWC Controls 10X18 ND-RSD NO Rectangular Damper | 10X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_027e1626-b5b7-4bb8-9b03-abdd93a3c285_medium.png?v=1720094298)
10X18 ND-RSD NO | Rectangular Damper | 10X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X18 ND-RSD NO
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![EWC Controls 8X28 ND-RSD NO Rectangular Damper | 8X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_8c8c0c10-6a4f-45ca-9f4a-0da9525d762d_medium.png?v=1719987540)
8X28 ND-RSD NO | Rectangular Damper | 8X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 8X28 ND-RSD NO
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![EWC Controls 8X24 ND-RSD NO Rectangular Damper | 8X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_4dc2b18f-9fd7-4a8a-8ee2-a6ec5fbbdcb5_medium.png?v=1720094307)
8X24 ND-RSD NO | Rectangular Damper | 8X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X24 ND-RSD NO
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![EWC Controls 8X22 ND-RSD NO Rectangular Damper | 8X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_2900dea1-8033-408d-bda0-f935f455ff44_medium.png?v=1720000541)
8X22 ND-RSD NO | Rectangular Damper | 8X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X22 ND-RSD NO
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