Zone dampers Spring return (no) Spring return
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![iO HVAC Controls HD-0806 Rectangular 08 x 06 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_5105d636-4901-4c95-bc32-42f23df62276_medium.jpg?v=1719992227)
HD-0806 | Rectangular 08 x 06 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-0806
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![iO HVAC Controls HD-2406 24 x 06 Rectangular Two-Position Zone Damper - 2 Wire Actuator | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_53f196f5-5185-44f4-be90-da6d6a1e809b_medium.jpg?v=1719992231)
HD-2406 | 24 x 06 Rectangular Two-Position Zone Damper - 2 Wire Actuator | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2406
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![iO HVAC Controls HD-2814-BM Rectangular 28 x 14 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_a5397571-a4df-428d-90bc-85fb3d5c9a9f_medium.jpg?v=1719992227)
HD-2814-BM | Rectangular 28 x 14 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2814-BM
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![iO HVAC Controls HD-2812-BM Rectangular 28 x 12 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_eb32448b-8ac8-459d-9932-89c7644ab36e_medium.jpg?v=1719992226)
HD-2812-BM | Rectangular 28 x 12 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2812-BM
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![iO HVAC Controls HD-2812 Rectangular 28 x 12 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_52aa6dae-84ea-4a35-818f-c46e82ee7a05_medium.jpg?v=1719992226)
HD-2812 | Rectangular 28 x 12 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2812
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![iO HVAC Controls HD-3610 Rectangular 36 x 10 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_4da94bc4-fa4a-46e4-a36b-e93b9d355e23_medium.jpg?v=1719992226)
HD-3610 | Rectangular 36 x 10 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3610
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![iO HVAC Controls HD-3010-BM Rectangular 30 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_7a7bb108-5380-4353-8803-b9c8af041f76_medium.jpg?v=1719992220)
HD-3010-BM | Rectangular 30 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3010-BM
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![iO HVAC Controls HD-1208 Rectangular 12 x 08 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_69b4e118-903a-4bcd-83f1-5e2e2f351009_medium.jpg?v=1719992220)
HD-1208 | Rectangular 12 x 08 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1208
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![iO HVAC Controls HD-1408 Rectangular 14 x 08 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_1c2caeb9-9bdc-4949-ba7d-dab52d99b9dc_medium.jpg?v=1719992220)
HD-1408 | Rectangular 14 x 08 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1408
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![iO HVAC Controls HD-1816-BM Rectangular 18 x 16 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_d71fee8c-32be-4f33-8bad-2a6b7e96d0c9_medium.jpg?v=1719992215)
HD-1816-BM | Rectangular 18 x 16 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1816-BM
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![iO HVAC Controls HD-2816 Rectangular 28 x 16 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_0df40ecf-8097-418f-a541-0b55c9621358_medium.jpg?v=1719992211)
HD-2816 | Rectangular 28 x 16 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2816
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![iO HVAC Controls HD-1212 Rectangular 12 x 12 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_a6140e20-9ba9-4518-9384-6d2cd170b9b9_medium.jpg?v=1719992212)
HD-1212 | Rectangular 12 x 12 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1212
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![iO HVAC Controls HD-2808-BM Rectangular 28 x 08 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_0bcfe2f0-bfac-4371-85cf-e584dd8ddecc_medium.jpg?v=1719992211)
HD-2808-BM | Rectangular 28 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2808-BM
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![iO HVAC Controls HD-2018 Rectangular 20 x 18 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_a0637555-ea50-48b7-a2a5-6a63bad12081_medium.jpg?v=1719992216)
HD-2018 | Rectangular 20 x 18 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2018
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![iO HVAC Controls HD-2616-BM Rectangular 26 x 16 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_ed427a3e-2e4d-4568-a1f8-84a0226978e5_medium.jpg?v=1719992215)
HD-2616-BM | Rectangular 26 x 16 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2616-BM
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HD-1008 | Rectangular 10 x 08 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1008
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![iO HVAC Controls HD-2618-BM Rectangular 26 x 18 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_cd34ffad-ff5c-4d24-858e-b9e4f109c960_medium.jpg?v=1719992212)
HD-2618-BM | Rectangular 26 x 18 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2618-BM
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![iO HVAC Controls HD-2422 Rectangular 24 x 22 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_2d47dc7e-b547-4e84-9e33-f822352fea95_medium.jpg?v=1719992211)
HD-2422 | Rectangular 24 x 22 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2422
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![iO HVAC Controls HD-2012-BM Rectangular 20 x 12 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_aea3177b-707c-48e6-86c5-5925bc8e1edd_medium.jpg?v=1719992207)
HD-2012-BM | Rectangular 20 x 12 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2012-BM
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![iO HVAC Controls HD-2014-BM Rectangular 20 x 14 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_00788656-5942-482c-87b3-164e6b2553c8_medium.jpg?v=1719992207)
HD-2014-BM | Rectangular 20 x 14 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2014-BM
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![iO HVAC Controls HD-2614 Rectangular 26 x 14 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_be90eb2d-833b-44fa-b621-3af0f169087f_medium.jpg?v=1719992206)
HD-2614 | Rectangular 26 x 14 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2614
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![iO HVAC Controls HD-2214-BM Rectangular 22 x 14 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_e7878700-a019-4c52-9e38-b904a5d0b5e0_medium.jpg?v=1719992206)
HD-2214-BM | Rectangular 22 x 14 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2214-BM
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![iO HVAC Controls HD-2621 26 x 21 Two-Position Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_e73a854d-2f66-4178-81e0-9f0e3fc5e26e_medium.jpg?v=1719992202)
HD-2621 | 26 x 21 Two-Position Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2621
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![iO HVAC Controls HD-3008-BM Rectangular 30 x 08 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_c5e769a3-607e-4421-afaa-923d35a92a5c_medium.jpg?v=1719992202)
HD-3008-BM | Rectangular 30 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3008-BM
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