{"product_id":"io-hvac-controls-mbd-2020-manual-balancing-damper-20x20","title":"Io Hvac Controls MBD-2020 Manual Balancing Damper 20x20","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe IO HVAC CONTROLS MBD-2020 is a manual balancing damper designed for airflow regulation in commercial and residential ductwork systems. The unit features a locking quadrant mechanism that holds the blade in a fixed position once the desired airflow setting is established, preventing drift or accidental adjustment after balancing. Sized for a 20 x 20 inch duct opening, it fits a common trunk and branch duct size used in large residential and light commercial air distribution systems. Installation is performed by licensed HVAC technicians during system commissioning or rebalancing work.\u003c\/p\u003e\n\u003cp\u003eThis damper is suited for supply or return air duct branches where manual airflow balancing is required. It is typically installed in sheet metal ductwork during new construction or retrofit projects where zone-level airflow control is needed. The 20 x 20 inch nominal size accommodates high-volume duct runs common in commercial rooftop unit systems, large air handlers, and multi-zone residential systems. The locking quadrant allows the balancing technician to set airflow precisely and secure the blade position without additional hardware.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e20 x 20 inch nominal duct opening fits standard large-format supply and return branches\u003c\/li\u003e\n  \u003cli\u003eLocking quadrant holds blade at any set position and resists movement after commissioning\u003c\/li\u003e\n  \u003cli\u003eManual operation requires no actuator, control wiring, or power source\u003c\/li\u003e\n  \u003cli\u003eDesigned for use in sheet metal ductwork during system balancing or airflow correction\u003c\/li\u003e\n  \u003cli\u003eCompact depth of 8 inches suits installations with limited inline clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style manual balancing damper for installation in 20 x 20 inch rectangular duct systems in residential and light commercial HVAC applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified HVAC technician in accordance with SMACNA duct construction standards and applicable local mechanical codes. Shut down and lock out the air handling unit before installing or adjusting the damper. Secure the damper to the duct using sheet metal screws or drive cleats as appropriate for the duct gauge. Once airflow is balanced and verified, engage the locking quadrant to secure the blade position.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Duct Size\u003c\/strong\u003e: 20 x 20 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 21 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: 26 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 13.45 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Control\u003c\/strong\u003e: Locking quadrant\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperation Type\u003c\/strong\u003e: Manual\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: IO HVAC CONTROLS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MBD-2020\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IO HVAC CONTROLS","offers":[{"title":"Default Title","offer_id":67950371635506,"sku":"MBD-2020","price":223.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ba3d4f3cbb8cf1c8856a9e660a2c3e26_94cffc33-ef53-46e0-91de-1bbf33b67892.png?v=1791715523","url":"https:\/\/voomisupply.com\/products\/io-hvac-controls-mbd-2020-manual-balancing-damper-20x20","provider":"Voomi Supply","version":"1.0","type":"link"}