Dampers (hidden without zone panels) Spring return (no) Spring return
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 14X28 ND-RSD NO Rectangular Damper | 14X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_dcb04594-c6cc-464e-9982-b77ee848d391_medium.png?v=1713902377)
14X28 ND-RSD NO | Rectangular Damper | 14X28 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 14X28 ND-RSD NO
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![EWC Controls 14X26 ND-RSD NO Rectangular Damper | 14X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f787f30b-8f6d-478a-baec-ba2a0cb11cb9_medium.png?v=1713902379)
14X26 ND-RSD NO | Rectangular Damper | 14X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 14X26 ND-RSD NO
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![EWC Controls 14X24 ND-RSD NO Rectangular Damper | 14X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_545c2fe8-3fe5-4790-a4db-c5222a8af443_medium.png?v=1713902395)
14X24 ND-RSD NO | Rectangular Damper | 14X24 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 14X24 ND-RSD NO
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![EWC Controls 14X18 ND-RSD NO Rectangular Damper | 14X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_09003296-7d28-4a61-b340-f070de63f571_medium.png?v=1713902355)
14X18 ND-RSD NO | Rectangular Damper | 14X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 14X18 ND-RSD NO
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![EWC Controls 14X16 ND-RSD NO Rectangular Damper | 14X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f71050e3-1a8e-4320-bb45-a999dffa4daf_medium.png?v=1713902418)
14X16 ND-RSD NO | Rectangular Damper | 14X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 14X16 ND-RSD NO
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![EWC Controls 12X22 ND-RSD NO Rectangular Damper | 12X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_275f77fc-5cd0-4305-a509-9da670fa9293_medium.png?v=1713902346)
12X22 ND-RSD NO | Rectangular Damper | 12X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 12X22 ND-RSD NO
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![EWC Controls 12X18 ND-RSD NO Rectangular Damper | 12X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f62da3d7-f673-465b-aa62-eb6a079fe575_medium.png?v=1713902338)
12X18 ND-RSD NO | Rectangular Damper | 12X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 12X18 ND-RSD NO
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![EWC Controls 10X30 ND-RSD NO Rectangular Damper | 10X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_603545ef-592b-4eb3-b640-021cc1f8d7c3_medium.png?v=1713902317)
10X30 ND-RSD NO | Rectangular Damper | 10X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 10X30 ND-RSD NO
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![EWC Controls 10X26 ND-RSD NO Rectangular Damper | 10X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_da3ab040-3a1d-4a2b-a2e1-8a09b6eaeb80_medium.png?v=1713902337)
10X26 ND-RSD NO | Rectangular Damper | 10X26 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 10X26 ND-RSD NO
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![EWC Controls 10X20 ND-RSD NO Rectangular Damper | 10X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_12d2168c-ffc7-43a5-8c52-b5fb18a79192_medium.png?v=1713902311)
10X20 ND-RSD NO | Rectangular Damper | 10X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X20 ND-RSD NO
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![EWC Controls 10x16 ND-RSD NO Rectangular Damper | 10X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_d7f68323-63b7-4645-8c31-210e1d82c2a4_medium.png?v=1713902331)
10x16 ND-RSD NO | Rectangular Damper | 10X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10x16 ND-RSD NO
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![EWC Controls 10X14 ND-RSD NO Rectangular Damper | 10X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_ce329e09-89d0-41aa-a5f6-eff034f34a66_medium.png?v=1713902332)
10X14 ND-RSD NO | Rectangular Damper | 10X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 10X14 ND-RSD NO
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![EWC Controls 8X30 ND-RSD NO Rectangular Damper | 8X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_ac8441a2-4399-48cb-8a31-e500a0a54194_medium.png?v=1713902480)
8X30 ND-RSD NO | Rectangular Damper | 8X30 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 8X30 ND-RSD NO
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![EWC Controls 8X12 ND-RSD NO Rectangular Damper | 8X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_65d985ae-650b-4064-b75f-e65be6c3f246_medium.png?v=1713902510)
8X12 ND-RSD NO | Rectangular Damper | 8X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X12 ND-RSD NO
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![EWC Controls 8X10 ND-RSD NO Rectangular Damper | 8X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_3424f44c-24bd-4e83-94b8-5a2afab3ae0e_medium.png?v=1713902462)
8X10 ND-RSD NO | Rectangular Damper | 8X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 8X10 ND-RSD NO
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![EWC Controls 28X20 ND-RSD NO Rectangular Damper | 28X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_725e0f11-3da7-42c5-b9c9-6ea68f326c60_medium.png?v=1713902451)
28X20 ND-RSD NO | Rectangular Damper | 28X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 28X20 ND-RSD NO
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![EWC Controls 26X8 ND-RSD NO Rectangular Damper | 26X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_a35c7b7b-6adb-4da0-949e-168e4132bb0c_medium.png?v=1713902442)
26X8 ND-RSD NO | Rectangular Damper | 26X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 26X8 ND-RSD NO
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![EWC Controls 24X22 ND-RSD NO Rectangular Damper | 24X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_587c8d36-6abf-4c4e-8a71-9d3c8294b806_medium.png?v=1713902432)
24X22 ND-RSD NO | Rectangular Damper | 24X22 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X22 ND-RSD NO
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![EWC Controls 24X16 ND-RSD NO Rectangular Damper | 24X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6f2cd73d-ddbb-4fc1-b237-4dbfed912b0f_medium.png?v=1713902494)
24X16 ND-RSD NO | Rectangular Damper | 24X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X16 ND-RSD NO
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![EWC Controls 24X14 ND-RSD NO Rectangular Damper | 24X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f3e7f0ef-4cd5-4b45-99cf-c08aec01d712_medium.png?v=1713902451)
24X14 ND-RSD NO | Rectangular Damper | 24X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X14 ND-RSD NO
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![EWC Controls 22X20 ND-RSD NO Rectangular Damper | 22X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_bd858eb5-41de-4ad6-8281-29d4dc95c8a8_medium.png?v=1713902443)
22X20 ND-RSD NO | Rectangular Damper | 22X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X20 ND-RSD NO
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![EWC Controls 22X14 ND-RSD NO Rectangular Damper | 22X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_615d4ec6-966c-4217-9749-e30757b8bf0d_medium.png?v=1713902431)
22X14 ND-RSD NO | Rectangular Damper | 22X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 22X14 ND-RSD NO
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![EWC Controls 20X20 ND-RSD NO Rectangular Damper | 20X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_a8526fbe-1733-49c8-902b-483517a4cdb3_medium.png?v=1713902432)
20X20 ND-RSD NO | Rectangular Damper | 20X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 20X20 ND-RSD NO
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![EWC Controls 20X12 ND-RSD NO Rectangular Damper | 20X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6cae7241-2850-42bd-959c-2beebc24c396_medium.png?v=1713902419)
20X12 ND-RSD NO | Rectangular Damper | 20X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | EWC Controls
Brand: EWC Controls
SKU: 20X12 ND-RSD NO
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