{"product_id":"io-hvac-controls-vd-12-sd-auxiliary-vav-diffuser-24x24","title":"Io Hvac Controls VD-12-SD Auxiliary Vav Diffuser 24x24","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe IO HVAC CONTROLS VD-12-SD is an auxiliary variable air volume (VAV) diffuser designed for ceiling installation in commercial and light commercial HVAC systems. Built around a 12-inch neck, it mounts in a standard 24 x 24 inch ceiling grid opening and connects to a VAV terminal unit to deliver conditioned air at controlled flow rates. The diffuser coordinates airflow distribution with the VAV controller, allowing zone-level temperature management without separate supply grilles. At 20 pounds, the unit is substantial enough for fixed ceiling installation and requires proper support during mounting. HVAC technicians and mechanical contractors are the primary installers for this type of equipment.\u003c\/p\u003e\n\u003cp\u003eThe VD-12-SD is suited for commercial office spaces, classrooms, medical facilities, and other occupied zones served by VAV air handling systems. Its 24 x 24 inch face plate integrates flush with standard lay-in ceiling tile grids, making it a common specification in new construction and retrofit VAV projects where zone-by-zone airflow control is required. The 12-inch neck diameter accommodates round duct connections standard to VAV terminal unit discharge outlets.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e12-inch neck diameter for direct connection to VAV terminal unit discharge\u003c\/li\u003e\n  \u003cli\u003e24 x 24 inch face fits standard commercial lay-in ceiling grid openings\u003c\/li\u003e\n  \u003cli\u003eAuxiliary diffuser configuration supports VAV zone airflow distribution\u003c\/li\u003e\n  \u003cli\u003eSubstantial 20-pound construction suitable for fixed ceiling installation\u003c\/li\u003e\n  \u003cli\u003eOverall depth of 26 inches accommodates above-ceiling plenum clearance requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style auxiliary VAV diffuser for commercial HVAC systems using VAV terminal units with 12-inch round discharge connections installed in standard 24 x 24 inch lay-in ceiling grid systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or mechanical contractor familiar with VAV air distribution systems. De-energize and lock out the air handling unit before making duct connections, and verify that the above-ceiling plenum provides adequate clearance for the 26-inch depth of the unit. Secure the diffuser to the duct and ceiling grid per the manufacturer instructions and applicable mechanical codes before restoring airflow. Do not operate the VAV system at this zone until all duct connections are sealed and the ceiling grid is fully supported.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFace Size\u003c\/strong\u003e: 24 x 24 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 11.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 26 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 20 pounds\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: VD-12-SD\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IO HVAC CONTROLS","offers":[{"title":"Default Title","offer_id":67948478234930,"sku":"VD-12-SD","price":388.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e5d2a1268d3d579649fcd7002143a2cc_7cd7ea29-3815-4711-82e0-45f75da64f88.png?v=1791665014","url":"https:\/\/voomisupply.com\/products\/io-hvac-controls-vd-12-sd-auxiliary-vav-diffuser-24x24","provider":"Voomi Supply","version":"1.0","type":"link"}