{"product_id":"ewc-controls-12-sbd-12-inch-smart-bypass-damper","title":"Ewc Controls 12 Sbd 12 Inch Smart Bypass Damper","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe EWC CONTROLS 12 SBD is a 12-inch self-balancing smart bypass damper designed for zoned HVAC systems where automatic pressure regulation is required. Using a barometric bypass design with a uniquely engineered blade, the 12 SBD eliminates the need for measuring instruments, adjustable weights, or manual spring calibration during setup. The result is a faster, repeatable bypass installation that meets ACCA Manual Zr compliance requirements. Constructed from steel and rated for 50\/60 Hz operation, this damper draws between 1.5 and 4 amps depending on system conditions. It is installed by licensed HVAC technicians as part of a zoned duct system.\u003c\/p\u003e\u003cp\u003eThe 12 SBD is suited for residential and light-commercial zoned forced-air systems where a bypass damper is required to relieve excess static pressure when zone dampers close. Because the unit is self-balancing, there is no need to install a separate bypass balancing hand damper alongside it. This simplifies duct layouts and reduces commissioning time on multi-zone retrofits and new installations alike. Systems using conventional zone control panels with standard bypass duct configurations are the primary application.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSelf-balancing blade design eliminates manual weight and spring adjustment during setup\u003c\/li\u003e\n\u003cli\u003eNo measuring instruments required for commissioning\u003c\/li\u003e\n\u003cli\u003eBarometric bypass operation automatically regulates system static pressure\u003c\/li\u003e\n\u003cli\u003eACCA Manual Zr compliant for zoned HVAC applications\u003c\/li\u003e\n\u003cli\u003eRemoves the need for a separate bypass balancing hand damper\u003c\/li\u003e\n\u003cli\u003eSteel construction rated for 50\/60 Hz electrical service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style bypass damper for zoned forced-air HVAC duct systems requiring a 12-inch barometric bypass damper installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician familiar with zoned duct system design and ACCA Manual Zr guidelines. Shut down the air handler and de-energize the zone control panel before installing or wiring the damper. Follow the manufacturer wiring diagram for low-voltage control connections and verify the bypass duct is sized appropriately for the system. Do not restrict the damper blade movement after installation, as the self-balancing function depends on unrestricted blade travel.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Size\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Type\u003c\/strong\u003e: Barometric Bypass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 1.5 to 4 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCycle\/Hertz\u003c\/strong\u003e: 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance\u003c\/strong\u003e: ACCA Manual Zr\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 12 SBD\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EWC CONTROLS","offers":[{"title":"Default Title","offer_id":51343115583794,"sku":"12 SBD","price":461.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310552452.webp?v=1782017076","url":"https:\/\/voomisupply.com\/products\/ewc-controls-12-sbd-12-inch-smart-bypass-damper","provider":"Voomi Supply","version":"1.0","type":"link"}