Dampers (hidden without zone panels) EWC Controls
Zone dampers for HVAC systems without zone control panels. Order Individual 24V motorized dampers for creating HVAC zones today at Blackhawk Supply.
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![EWC Controls 30X20 ND-RSD NO Rectangular Damper | 30X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_b57f2c73-793c-4a63-b3dd-be19e6e179ca_medium.png?v=1713902493)
30X20 ND-RSD NO | Rectangular Damper | 30X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X20 ND-RSD NO
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![](http://blackhawksupply.com/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c_medium.gif)
30X18 ND-RSD NO | Rectangular Damper | 30X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X18 ND-RSD NO
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![EWC Controls 30X16 ND-RSD NO Rectangular Damper | 30X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_44616f18-18ea-435a-b4d9-94d2a4938a84_medium.png?v=1713902506)
30X16 ND-RSD NO | Rectangular Damper | 30X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X16 ND-RSD NO
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![EWC Controls 30X12 ND-RSD NO Rectangular Damper | 30X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_4ea63dd0-5e23-4fe3-8c05-062548c1d836_medium.png?v=1713902499)
30X12 ND-RSD NO | Rectangular Damper | 30X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X12 ND-RSD NO
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![EWC Controls 30X10 ND-RSD NO Rectangular Damper | 30X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_2d0acd2b-f448-48bc-938e-1070a0a23fa1_medium.png?v=1713902512)
30X10 ND-RSD NO | Rectangular Damper | 30X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X10 ND-RSD NO
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![EWC Controls 30X8 ND-RSD NO Rectangular Damper | 30X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_8f9d3a60-d975-47cb-801f-6ebe30165978_medium.png?v=1713902489)
30X8 ND-RSD NO | Rectangular Damper | 30X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X8 ND-RSD NO
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![EWC Controls 30X6 ND-RSD NO Rectangular Damper | 30X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_998b81a7-ac32-4c82-8caf-20ca2202d0fe_medium.png?v=1713902466)
30X6 ND-RSD NO | Rectangular Damper | 30X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 30X6 ND-RSD NO
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![EWC Controls 28X28 ND-RSD NO Rectangular Damper | 28X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_ae186543-fb04-497f-8002-00cd528798ef_medium.png?v=1713902461)
28X28 ND-RSD NO | Rectangular Damper | 28X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X28 ND-RSD NO
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![EWC Controls 28X26 ND-RSD NO Rectangular Damper | 28X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_a4079e19-8d26-4c04-b1c7-6916f57fcfd0_medium.png?v=1713902447)
28X26 ND-RSD NO | Rectangular Damper | 28X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X26 ND-RSD NO
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![EWC Controls 28X24 ND-RSD NO Rectangular Damper | 28X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_503c2ff9-0bf8-4ab1-bf1d-7efac16eef75_medium.png?v=1713902498)
28X24 ND-RSD NO | Rectangular Damper | 28X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X24 ND-RSD NO
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![EWC Controls 28X22 ND-RSD NO Rectangular Damper | 28X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_4b6d0735-b283-4114-887e-56ab799fba83_medium.png?v=1713902464)
28X22 ND-RSD NO | Rectangular Damper | 28X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X22 ND-RSD NO
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![EWC Controls 28X18 ND-RSD NO Rectangular Damper | 28X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_683431e9-55a4-4f83-a03e-18a2a6ff0fa9_medium.png?v=1713902447)
28X18 ND-RSD NO | Rectangular Damper | 28X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X18 ND-RSD NO
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![EWC Controls 28X16 ND-RSD NO Rectangular Damper | 28X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f944a3df-84da-44f5-9946-da179097cee9_medium.png?v=1713902475)
28X16 ND-RSD NO | Rectangular Damper | 28X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X16 ND-RSD NO
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![EWC Controls 28X14 ND-RSD NO Rectangular Damper | 28X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_75ad3674-7d01-4022-9a18-d199983de750_medium.png?v=1713902470)
28X14 ND-RSD NO | Rectangular Damper | 28X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X14 ND-RSD NO
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![EWC Controls 28X12 ND-RSD NO Rectangular Damper | 28X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_b8c520b4-68ee-4e70-acc0-c80372ae4616_medium.png?v=1713902470)
28X12 ND-RSD NO | Rectangular Damper | 28X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X12 ND-RSD NO
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![EWC Controls 28X10 ND-RSD NO Rectangular Damper | 28X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_04643d56-9879-49c6-93d3-d7948f69ca81_medium.png?v=1713902456)
28X10 ND-RSD NO | Rectangular Damper | 28X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X10 ND-RSD NO
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![EWC Controls 28X8 ND-RSD NO Rectangular Damper | 28X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_8d0f27ca-e6a3-47f9-b72f-4bd33b36ed2c_medium.png?v=1713902438)
28X8 ND-RSD NO | Rectangular Damper | 28X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X8 ND-RSD NO
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![EWC Controls 28X6 ND-RSD NO Rectangular Damper | 28X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_5f3c43db-1087-4b61-a8c1-463a1da4da21_medium.png?v=1713902480)
28X6 ND-RSD NO | Rectangular Damper | 28X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X6 ND-RSD NO
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![EWC Controls 26X26 ND-RSD NO Rectangular Damper | 26X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6d47fdbe-2973-42e8-8c38-a29387f6d64c_medium.png?v=1713902465)
26X26 ND-RSD NO | Rectangular Damper | 26X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X26 ND-RSD NO
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![EWC Controls 26X24 ND-RSD NO Rectangular Damper | 26X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_7c4597ca-2c52-4c78-970e-b098761f1b7f_medium.png?v=1713902470)
26X24 ND-RSD NO | Rectangular Damper | 26X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X24 ND-RSD NO
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![EWC Controls 26X22 ND-RSD NO Rectangular Damper | 26X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f55c2297-3d67-4745-a3c8-c740d086e5da_medium.png?v=1713902433)
26X22 ND-RSD NO | Rectangular Damper | 26X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X22 ND-RSD NO
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![EWC Controls 26X20 ND-RSD NO Rectangular Damper | 26X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_2a27f312-0303-4639-935f-7ba4f1e0a73a_medium.png?v=1713902451)
26X20 ND-RSD NO | Rectangular Damper | 26X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X20 ND-RSD NO
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![EWC Controls 26X18 ND-RSD NO Rectangular Damper | 26X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6e0c8e0c-4539-411f-b4b3-4f0b98112fd0_medium.png?v=1713902437)
26X18 ND-RSD NO | Rectangular Damper | 26X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X18 ND-RSD NO
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![EWC Controls 26X16 ND-RSD NO Rectangular Damper | 26X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_2fc3a0a4-cd7a-4643-a958-c07f325bbce1_medium.png?v=1713902461)
26X16 ND-RSD NO | Rectangular Damper | 26X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X16 ND-RSD NO
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