{"product_id":"io-hvac-controls-md-2820-bm-rectangular-zone-damper","title":"Io Hvac Controls MD-2820-BM Rectangular Zone Damper","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IO HVAC CONTROLS MD-2820-BM is a rectangular two-position zone damper sized at 28 inches wide by 20 inches tall, fitted with a bottom-mount Belimo 3-wire actuator. It controls airflow in a single zone by opening or closing on command from a zone controller or thermostat. The blade assembly and frame are built for standard rectangular ductwork installations. The bottom-mount actuator position suits installations where top or side access is limited. Licensed HVAC technicians install this damper as part of a zoned forced-air system to balance comfort and efficiency across multiple areas of a building.\u003c\/p\u003e\u003cp\u003eThis damper is suited for residential and light commercial zoning applications in forced-air HVAC systems. It fits into rectangular supply or return duct runs where a two-position control strategy is used. The Belimo 3-wire actuator provides spring-return operation, meaning the damper moves to a defined fail-safe position on power loss. Typical installations include multi-zone split systems, air handler zoning panels, and bypass zoning setups where individual zone control is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e28 inches x 20 inches rectangular damper sized for standard duct openings\u003c\/li\u003e\n\u003cli\u003eTwo-position control for open\/closed zone airflow management\u003c\/li\u003e\n\u003cli\u003eBottom-mount actuator configuration for installations with restricted top or side clearance\u003c\/li\u003e\n\u003cli\u003eBelimo 3-wire actuator with spring-return fail-safe operation\u003c\/li\u003e\n\u003cli\u003eCompatible with standard zone controllers and 24-volt control wiring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation zone damper for rectangular duct systems using Belimo 3-wire actuator-compatible zone controllers in residential and light commercial forced-air HVAC applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician following applicable mechanical codes. Shut down the air handler and de-energize the control panel before mounting the damper or making any wiring connections. Ensure the duct opening matches the damper frame dimensions before securing. Verify actuator wiring polarity and control signal compatibility with the zone panel prior to restoring power.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Width\u003c\/strong\u003e: 28 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Height\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Type\u003c\/strong\u003e: Belimo 3-Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Position\u003c\/strong\u003e: Bottom Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Type\u003c\/strong\u003e: 2 Position (Open\/Closed)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 26 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Depth\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 15.76 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: IO HVAC CONTROLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MD-2820-BM\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IO HVAC CONTROLS","offers":[{"title":"Default Title","offer_id":67948915622194,"sku":"MD-2820-BM","price":433.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/75f2b6c2829c7454f6fbae3d993a1e9d_13b58b26-1083-4655-b86c-86e54af54186.png?v=1791676472","url":"https:\/\/voomisupply.com\/products\/io-hvac-controls-md-2820-bm-rectangular-zone-damper","provider":"Voomi Supply","version":"1.0","type":"link"}