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 12X30 ND-15S 12X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_2178f6be-1878-43c0-972d-8d51a43f0c3e_medium.png?v=1720000320)
12X30 ND-15S | 12X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 12X30 ND-15S
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![EWC Controls 12X20 ND-15S 12X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_3ee060cd-d261-42c3-abc0-236d276c28bf_medium.png?v=1720000325)
12X20 ND-15S | 12X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 12X20 ND-15S
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![EWC Controls 10X28 ND-15S 10X28 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_5aeb9265-3894-4165-b928-9e67c9041521_medium.png?v=1720000437)
10X28 ND-15S | 10X28 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 10X28 ND-15S
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![EWC Controls 10X14 ND-15S 10X14 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_4c0b6bc9-81c6-4a18-8e8f-d64226285209_medium.png?v=1720000326)
10X14 ND-15S | 10X14 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 10X14 ND-15S
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![EWC Controls 8X30 ND-15S 8X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_d45c67cf-c43d-4e74-9818-c2d41b4623ba_medium.png?v=1720000365)
8X30 ND-15S | 8X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 8X30 ND-15S
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![EWC Controls 8X26 ND-15S 8X26 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_37cbe8fd-59bf-4883-976d-d4b94308498b_medium.png?v=1720000355)
8X26 ND-15S | 8X26 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 8X26 ND-15S
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![EWC Controls 8X10 ND-15S 8X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_99aaaf96-87ba-4e22-ae94-50ad1ae84936_medium.png?v=1720000388)
8X10 ND-15S | 8X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 8X10 ND-15S
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![EWC Controls 8X24 ND-15S 8X24 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_07284d42-472f-436c-a3e2-714fd2d6c0f1_medium.png?v=1720000447)
8X24 ND-15S | 8X24 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 8X24 ND-15S
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![EWC Controls 30X30 ND-15S 30X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_458fc75d-0c1b-4966-ac74-100b65e2fbc6_medium.png?v=1720000409)
30X30 ND-15S | 30X30 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 30X30 ND-15S
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![EWC Controls 30X12 ND-15S 30X12 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_156ab6e1-a32b-4989-afa6-49be4337e9ee_medium.png?v=1720000365)
30X12 ND-15S | 30X12 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 30X12 ND-15S
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![EWC Controls 30X10 ND-15S 30X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_83e1ef64-e600-402a-b8c2-b25709ba8541_medium.png?v=1720000346)
30X10 ND-15S | 30X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 30X10 ND-15S
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![EWC Controls 24X22 ND-15S 24X22 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_9b4171e4-2889-453c-843c-83e67cd86a05_medium.png?v=1720000350)
24X22 ND-15S | 24X22 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 24X22 ND-15S
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![EWC Controls 24X8 ND-15S 24X8 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_18d7b81c-1bd8-4aa9-bce9-04372267fe2a_medium.png?v=1720000335)
24X8 ND-15S | 24X8 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 24X8 ND-15S
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![EWC Controls 22X20 ND-15S 22X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_94f77f8b-554e-4c93-b9f2-a3b04ff1c64f_medium.png?v=1720000330)
22X20 ND-15S | 22X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 22X20 ND-15S
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![EWC Controls 18X10 ND-15S 18X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_fedae121-6419-4351-ba52-6ea0c12a1c1c_medium.png?v=1720000335)
18X10 ND-15S | 18X10 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 18X10 ND-15S
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![EWC Controls 12X8 ND-15S 12X8 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_dbde63d6-2398-4c1b-9eee-9a1e5e9fbfe7_medium.png?v=1720000330)
12X8 ND-15S | 12X8 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 12X8 ND-15S
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![EWC Controls 10X20 ND-15S 10X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_9fb1f548-f81b-460c-8880-32b807364490_medium.png?v=1720000320)
10X20 ND-15S | 10X20 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 10X20 ND-15S
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![EWC Controls 8X12 ND-15S 8X12 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_7065a0b0-32f2-4b1f-8bec-948bf0513390_medium.png?v=1720094302)
8X12 ND-15S | 8X12 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 8X12 ND-15S
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![EWC Controls 10x6 ND-15S 10X6 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN/POWER CLOSE | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_4e74e49e-ba6d-4c87-a34b-4e0e1396771e_medium.png?v=1720000418)
10x6 ND-15S | 10X6 ND-15S MOTORIZED DAMPER 15 SECOND POWER OPEN / POWER CLOSE | EWC Controls
Brand: EWC Controls
SKU: 10x6 ND-15S
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![EWC Controls 4 SID 4 Inch Slip In Retrofit Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/sid1_5ee89470-427f-4c28-bae0-c567eabe4fe9_medium.gif?v=1713902470)
4 SID | 4 Inch Slip In Retrofit Damper | EWC Controls
Brand: EWC Controls
SKU: 4 SID
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![EWC Controls 7 URD 7 Inch Round Motorized Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/urd-sm_1070f17b-9494-4831-bc09-8139244ec484_medium.gif?v=1720000541)
7 URD | 7 Inch Round Motorized Damper | EWC Controls
Brand: EWC Controls
SKU: 7 URD
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![EWC Controls 20X12 PRD 20X12 Rectangular Manual Bypass Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/prd_73c64b74-d884-4f16-aa1e-1fc72db51388_medium.gif?v=1720000487)
20X12 PRD | 20X12 Rectangular Manual Bypass Damper | EWC Controls
Brand: EWC Controls
SKU: 20X12 PRD
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![EWC Controls 12X10 PRD 12X10 Rectangular Manual Bypass Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/prd_medium.gif?v=1720000409)
12X10 PRD | 12X10 Rectangular Manual Bypass Damper | EWC Controls
Brand: EWC Controls
SKU: 12X10 PRD
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![EWC Controls 18X22 ND Rectangular Damper | 18X22 ND MOTORIZED DAMPER | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd_2433afc3-672a-46ec-ab73-2a90025f4c7f_medium.png?v=1720000469)
18X22 ND | Rectangular Damper | 18X22 ND MOTORIZED DAMPER | EWC Controls
Brand: EWC Controls
SKU: 18X22 ND
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VH7270F1000 | Humidistat | 0-10V Hum | Switched Dehum | Prprtnl High Lim | OutRst | Viconics
Brand: Viconics
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