Dampers Spring return (no) Spring return
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![EWC Controls 22X8 ND-RSD NO Rectangular Damper | 22X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_02d85286-2003-4928-bd21-8f7ca5f39818_medium.png?v=1713902451)
22X8 ND-RSD NO | Rectangular Damper | 22X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X8 ND-RSD NO
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![EWC Controls 22X6 ND-RSD NO Rectangular Damper | 22X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_10511b1c-fb9f-4f57-add4-6d4be3b77e3b_medium.png?v=1713902432)
22X6 ND-RSD NO | Rectangular Damper | 22X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X6 ND-RSD NO
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![EWC Controls 20X18 ND-RSD NO Rectangular Damper | 20X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_e2591357-18e2-4a5c-b563-e650c229a42f_medium.png?v=1713902536)
20X18 ND-RSD NO | Rectangular Damper | 20X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 20X18 ND-RSD NO
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![EWC Controls 20X16 ND-RSD NO Rectangular Damper | 20X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_4935a947-9dea-4825-bb9a-72475bd3bebf_medium.png?v=1713902438)
20X16 ND-RSD NO | Rectangular Damper | 20X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 20X16 ND-RSD NO
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![EWC Controls 20X10 ND-RSD NO Rectangular Damper | 20X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6be87ad3-83c8-4ba8-b9f0-c917a5c226d1_medium.png?v=1713902402)
20X10 ND-RSD NO | Rectangular Damper | 20X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 20X10 ND-RSD NO
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![EWC Controls 20X6 ND-RSD NO Rectangular Damper | 20X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_83c8bc72-5977-4e39-84a1-e4589d766aad_medium.png?v=1713902427)
20X6 ND-RSD NO | Rectangular Damper | 20X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 20X6 ND-RSD NO
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![EWC Controls 18X18 ND-RSD NO Rectangular Damper | 18X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f183fb00-bea7-4ca6-9bfe-44e5337f42e2_medium.png?v=1713902404)
18X18 ND-RSD NO | Rectangular Damper | 18X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 18X18 ND-RSD NO
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![EWC Controls 18X16 ND-RSD NO Rectangular Damper | 18X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_7145f36c-f9e9-41de-a25f-7914166d4abf_medium.png?v=1713902396)
18X16 ND-RSD NO | Rectangular Damper | 18X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 18X16 ND-RSD NO
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![EWC Controls 18X14 ND-RSD NO Rectangular Damper | 18X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_0912a8c6-cde5-4777-b2bd-55d6fcd8163e_medium.png?v=1713902427)
18X14 ND-RSD NO | Rectangular Damper | 18X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 18X14 ND-RSD NO
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![EWC Controls 18X12 ND-RSD NO Rectangular Damper | 18X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_4393d94a-dd0b-4386-8321-18c2370aca4d_medium.png?v=1713902422)
18X12 ND-RSD NO | Rectangular Damper | 18X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 18X12 ND-RSD NO
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![EWC Controls 18X10 ND-RSD NO Rectangular Damper | 18X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_675fc579-edf7-42be-ba13-c425f06c1a95_medium.png?v=1713902409)
18X10 ND-RSD NO | Rectangular Damper | 18X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 18X10 ND-RSD NO
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![EWC Controls 18X8 ND-RSD NO Rectangular Damper | 18X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_d02226db-39e0-47be-948b-438f1cda3d82_medium.png?v=1713902399)
18X8 ND-RSD NO | Rectangular Damper | 18X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 18X8 ND-RSD NO
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![EWC Controls 16X12 ND-RSD NO Rectangular Damper | 16X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_b796fcad-d713-4c50-b6cb-70fda3ce3853_medium.png?v=1713902386)
16X12 ND-RSD NO | Rectangular Damper | 16X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 16X12 ND-RSD NO
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![EWC Controls 16X6 ND-RSD NO Rectangular Damper | 16X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_1838b711-6ff7-4c97-b65f-c5968c44e8bc_medium.png?v=1713902404)
16X6 ND-RSD NO | Rectangular Damper | 16X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 16X6 ND-RSD NO
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![EWC Controls 12X8 ND-RSD NO Rectangular Damper | 12X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_7b14aa33-ae3c-4d15-8e82-ccda378dc0ec_medium.png?v=1713902367)
12X8 ND-RSD NO | Rectangular Damper | 12X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 12X8 ND-RSD NO
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![EWC Controls 10X8 ND-RSD NO Rectangular Damper | 10X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_a3ff600f-b083-4ce9-b378-6c7b34bb0758_medium.png?v=1713902353)
10X8 ND-RSD NO | Rectangular Damper | 10X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X8 ND-RSD NO
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![EWC Controls 8X8 ND-RSD NO Rectangular Damper | 8X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_087cd90f-c3b4-48e7-808b-114ad9035d2e_medium.png?v=1713902494)
8X8 ND-RSD NO | Rectangular Damper | 8X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X8 ND-RSD NO
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![EWC Controls 8X6 ND-RSD NO Rectangular Damper | 8X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_95c3f613-9f08-4a8d-bfea-b244717ee524_medium.png?v=1713902495)
8X6 ND-RSD NO | Rectangular Damper | 8X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X6 ND-RSD NO
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