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 10X18 ND-RSD NC Rectangular Damper | 10X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_f377afc0-1fff-47c0-a12c-654fe5fcf4b7_medium.png?v=1720000388)
10X18 ND-RSD NC | Rectangular Damper | 10X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 10X18 ND-RSD NC
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![EWC Controls 10x16 ND-RSD NC Rectangular Damper | 10X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_47c218e7-1e7a-4b31-9e38-b8cee134f35e_medium.png?v=1720000398)
10x16 ND-RSD NC | Rectangular Damper | 10X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 10x16 ND-RSD NC
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![EWC Controls 10X14 ND-RSD NC Rectangular Damper | 10X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_377aac28-42eb-4aa3-9042-2323fb6206a3_medium.png?v=1720000388)
10X14 ND-RSD NC | Rectangular Damper | 10X14 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 10X14 ND-RSD NC
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![EWC Controls 24X18 ND-RSD NC Rectangular Damper | 24X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_3f59db1a-8882-4d13-9912-866055427136_medium.png?v=1720000507)
24X18 ND-RSD NC | Rectangular Damper | 24X18 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X18 ND-RSD NC
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![EWC Controls 24X16 ND-RSD NC Rectangular Damper | 24X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_9ed8f441-3c6c-4a54-b02d-e1967386f38f_medium.png?v=1720000547)
24X16 ND-RSD NC | Rectangular Damper | 24X16 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X16 ND-RSD NC
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![EWC Controls 24X10 ND-RSD NC Rectangular Damper | 24X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_7a151048-b03f-499a-a92c-52add1949bb9_medium.png?v=1720000501)
24X10 ND-RSD NC | Rectangular Damper | 24X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X10 ND-RSD NC
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![EWC Controls 24X8 ND-RSD NC Rectangular Damper | 24X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED] | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_66e50b39-12e9-467b-8c18-c50448937573_medium.png?v=1720000512)
24X8 ND-RSD NC | Rectangular Damper | 24X8 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED] | EWC Controls (OBSOLETE)
Brand: EWC Controls
SKU: 24X8 ND-RSD NC
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![EWC Controls 20X10 ND-RSD NC Rectangular Damper | 20X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_50e1cadd-e7da-4502-b3cf-1fa2cb8ea4cd_medium.png?v=1720094307)
20X10 ND-RSD NC | Rectangular Damper | 20X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 20X10 ND-RSD NC
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![EWC Controls 16X10 ND-RSD NC Rectangular Damper | 16X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_c13c7a3d-dad8-4620-9e28-fd4a1bc81340_medium.png?v=1720000442)
16X10 ND-RSD NC | Rectangular Damper | 16X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 16X10 ND-RSD NC
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![EWC Controls 14X12 ND-RSD NC Rectangular Damper | 14X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_51b462ea-060f-4e3b-b520-3b761e576c70_medium.png?v=1720000418)
14X12 ND-RSD NC | Rectangular Damper | 14X12 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 14X12 ND-RSD NC
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![EWC Controls 14X10 ND-RSD NC Rectangular Damper | 14X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_6cdd0c18-9fa6-412e-803d-73f54e3c14b2_medium.png?v=1720000468)
14X10 ND-RSD NC | Rectangular Damper | 14X10 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 14X10 ND-RSD NC
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![EWC Controls 14X6 ND-RSD NC Rectangular Damper | 14X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_5cf0f11a-c8db-44bd-aeff-85ce482d77f0_medium.png?v=1720000452)
14X6 ND-RSD NC | Rectangular Damper | 14X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 14X6 ND-RSD NC
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![EWC Controls 10X6 ND-RSD NC Rectangular Damper | 10X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_b194edb8-83b9-4605-b0c4-97bb926379aa_medium.png?v=1720000393)
10X6 ND-RSD NC | Rectangular Damper | 10X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 10X6 ND-RSD NC
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![EWC Controls 8X6 ND-RSD NC Rectangular Damper | 8X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_e38da65b-77cd-4d70-87bd-a01ee72de800_medium.png?v=1719987515)
8X6 ND-RSD NC | Rectangular Damper | 8X6 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY CLOSED | EWC Controls
Brand: EWC Controls
SKU: 8X6 ND-RSD NC
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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_308e4dfb-60d8-4d25-a04f-fd79b68850c6_medium.png?v=1720000441)
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_a1bf6e54-7569-46bd-abb2-300676efb916_medium.png?v=1720000452)
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_22998465-36b1-4f3d-a5a0-a8b63a878dcf_medium.png?v=1720000413)
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_0fa7a41f-7dcc-4d0c-a358-55bd3328037b_medium.png?v=1720000473)
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_c56a8574-70f1-4a55-931a-7628a5ff0b70_medium.png?v=1720000413)
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_3dc9a64d-9a51-4a1d-978d-ca73da0ac544_medium.png?v=1720000408)
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_c983be55-a0e8-4234-ad52-9453e4a03788_medium.png?v=1720000388)
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 10X20 ND-RSD NO Rectangular Damper | 10X20 ND MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/nd-rsd_05d15f4b-30b2-462d-979c-273659347bbb_medium.png?v=1720000393)
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_cabe55ea-04b8-47c6-b191-0edcc6ace701_medium.png?v=1720000397)
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_c6de6cb5-6b3f-4382-ab1a-0783d36194c7_medium.png?v=1720000397)
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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