Zone dampers Spring return (no) Spring return
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![iO HVAC Controls HD-1610-BM Rectangular 16 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_468a1b3c-5292-4ace-8f12-bec193b65fa1_medium.jpg?v=1719992281)
HD-1610-BM | Rectangular 16 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1610-BM
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![iO HVAC Controls HD-1010 Rectangular 10 x 10 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_20fb6d18-61c4-445f-82c9-7e0f22e1552c_medium.jpg?v=1719992207)
HD-1010 | Rectangular 10 x 10 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1010
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![iO HVAC Controls HD-1410-BM Rectangular 14 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_913ef93f-ba2c-4b6a-872d-5c0f13121309_medium.jpg?v=1719992237)
HD-1410-BM | Rectangular 14 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1410-BM
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![iO HVAC Controls HD-1210-BM Rectangular 12 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_d1b534e5-b24f-4d0d-9f88-9d6d5b613f5d_medium.jpg?v=1719992236)
HD-1210-BM | Rectangular 12 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1210-BM
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![iO HVAC Controls HD-1408-BM Rectangular 14 x 08 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_05f4438d-525a-47d7-9ac8-1597ac757a2f_medium.jpg?v=1719992170)
HD-1408-BM | Rectangular 14 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1408-BM
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![iO HVAC Controls HD-3624-BM Rectangular 36 x 24 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_31344303-59e5-4446-8393-655fee2352fd_medium.jpg?v=1719992287)
HD-3624-BM | Rectangular 36 x 24 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3624-BM
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![iO HVAC Controls HD-1008-BM Rectangular 10 x 08 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_eda98c7a-58aa-448e-9288-f337d16d0e79_medium.jpg?v=1719992215)
HD-1008-BM | Rectangular 10 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1008-BM
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![iO HVAC Controls HD-1808-BM Rectangular 18 x 08 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_5fb965a1-78c0-4bc5-861b-8640a6602975_medium.jpg?v=1719992181)
HD-1808-BM | Rectangular 18 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1808-BM
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![iO HVAC Controls HD-0806-BM Rectangular 08 x 06 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_c4887733-45af-401f-ae4f-a917aa2d862f_medium.jpg?v=1719992201)
HD-0806-BM | Rectangular 08 x 06 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-0806-BM
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![iO HVAC Controls HD-2020 20 x 20 Rectangular Two-Position Zone Damper - 2 Wire Actuator | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_320de06f-d26c-460a-b575-4cde4dacb659_medium.jpg?v=1719992285)
HD-2020 | 20 x 20 Rectangular Two-Position Zone Damper - 2 Wire Actuator | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2020
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![iO HVAC Controls HD-1612-BM Rectangular 16 x 12 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_4c6f51aa-6cb5-4007-a97b-8e641b70b43e_medium.jpg?v=1719992281)
HD-1612-BM | Rectangular 16 x 12 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1612-BM
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![iO HVAC Controls HD-2010-BM Rectangular 20 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_516fa140-a5ca-4e46-97a4-ba96b4f0a636_medium.jpg?v=1719992275)
HD-2010-BM | Rectangular 20 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2010-BM
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![iO HVAC Controls HD-0808 Rectangular 08 x 08 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_0ec22199-25ed-44e1-bcc4-686bb5efd22e_medium.jpg?v=1719992271)
HD-0808 | Rectangular 08 x 08 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-0808
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HD-1406 | Rectangular 14 x 06 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1406
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![iO HVAC Controls HD-3614 36 x 14 Rectangular Two-Position Zone Damper - 2 Wire Actuator | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_afc6e15f-a725-4993-a18d-0204fa5792d0_medium.jpg?v=1719992265)
HD-3614 | 36 x 14 Rectangular Two-Position Zone Damper - 2 Wire Actuator | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3614
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![iO HVAC Controls HD-1412-BM Rectangular 14 x 12 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_b4c819c5-49f3-4459-8a7b-1f95212fa299_medium.jpg?v=1719992266)
HD-1412-BM | Rectangular 14 x 12 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1412-BM
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HD-2208-BM | Rectangular 22 x 08 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2208-BM
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![iO HVAC Controls HD-1810-BM Rectangular 18 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_e9e87bfa-7d76-4057-ba61-8a412878604e_medium.jpg?v=1719992257)
HD-1810-BM | Rectangular 18 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1810-BM
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![iO HVAC Controls HD-1818 Rectangular 18 x 18 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_b06703d6-af8a-462b-9ab0-17f3db31cb31_medium.jpg?v=1719992251)
HD-1818 | Rectangular 18 x 18 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1818
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![iO HVAC Controls HD-3016 30 x 16 Rectangular Two-Position Zone Damper - 2 Wire Actuator | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_78315992-dbba-4e06-8dab-f091d02d1fdf_medium.jpg?v=1719992241)
HD-3016 | 30 x 16 Rectangular Two-Position Zone Damper - 2 Wire Actuator | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-3016
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![iO HVAC Controls HD-1606 Rectangular 16 x 06 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_4c97a2e0-dfa9-4dd5-8692-e1b69fe66789_medium.jpg?v=1719992237)
HD-1606 | Rectangular 16 x 06 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1606
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![iO HVAC Controls HD-1414 Rectangular 14 x 14 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_28bf5b77-55bc-41ee-acc8-391591787d17_medium.jpg?v=1719992231)
HD-1414 | Rectangular 14 x 14 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-1414
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![iO HVAC Controls HD-2424 Rectangular 24 x 24 Zone Damper | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_d39a4533-f679-4646-90f5-e5d6b004144b_medium.jpg?v=1719992221)
HD-2424 | Rectangular 24 x 24 Zone Damper | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2424
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![iO HVAC Controls HD-2210-BM Rectangular 22 x 10 Zone Damper-BM | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/iO-HDXXXX_1dc580e8-1804-4bb0-9f56-f3e86eec9219_medium.jpg?v=1719992220)
HD-2210-BM | Rectangular 22 x 10 Zone Damper-BM | iO HVAC Controls
Brand: iO HVAC Controls
SKU: HD-2210-BM
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