{"product_id":"ewc-controls-10x12-nd-rsd-no-rectangular-damper-spring-return","title":"Ewc Controls 10x12 Nd-rsd No Rectangular Damper Spring Return","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe EWC CONTROLS 10x12 nd-rsd no is a motorized rectangular zone damper designed for forced-air HVAC zoning systems. Built in a 10 x 12 inch duct opening size, it uses a spring-return actuator configured normally open, meaning the blade defaults to the open position when power is removed. This fail-safe behavior maintains airflow through the zone during a power interruption or actuator fault. Licensed HVAC technicians install this damper as part of a multi-zone control system, pairing it with a zone control board and low-voltage thermostat wiring to regulate conditioned air delivery to individual zones.\u003c\/p\u003e\n\u003cp\u003eThis damper is suited for residential and light commercial forced-air zoning applications where rectangular duct configurations are present. The 10 x 12 inch form factor fits common trunk-line and branch-duct sizes used in central air and heating systems. Its motorized operation allows the zone controller to open and close the blade on demand, balancing airflow across multiple zones and improving overall system efficiency. It is particularly appropriate for retrofit zoning projects where spring-return, normally open operation is required by the system design.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMotorized actuator provides automatic, controller-driven blade operation\u003c\/li\u003e\n  \u003cli\u003eSpring-return mechanism defaults to normally open on power loss for fail-safe airflow\u003c\/li\u003e\n  \u003cli\u003eRectangular shape fits standard 10 x 12 inch duct openings\u003c\/li\u003e\n  \u003cli\u003eDesigned for multi-zone HVAC systems controlled by a low-voltage zone board\u003c\/li\u003e\n  \u003cli\u003eSpring return eliminates the need for a powered close signal, simplifying wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style motorized zone damper for rectangular duct zoning systems requiring a normally open, spring-return actuator configuration in a 10 x 12 inch size.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician familiar with zoned forced-air system wiring and duct modification. De-energize the air handler and zone control board before installing or wiring the damper. Follow the zone controller manufacturer's low-voltage wiring diagram and applicable mechanical codes for duct penetrations and fastening. Verify blade orientation and airflow direction before securing the damper in the duct.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Rectangular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 10 x 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotorized\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActuator Type\u003c\/strong\u003e: Spring Return\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault Position\u003c\/strong\u003e: Normally Open\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: EWC CONTROLS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 10x12 nd-rsd no\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EWC CONTROLS","offers":[{"title":"Default Title","offer_id":51267910009138,"sku":"10x12 ND-RSD NO","price":190.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308912211.jpg?v=1780694121","url":"https:\/\/voomisupply.com\/products\/ewc-controls-10x12-nd-rsd-no-rectangular-damper-spring-return","provider":"Voomi Supply","version":"1.0","type":"link"}