ZoneFirst SPRD-12X12 Damper

The ZoneFirst SPRD-12X12 is a professional-grade barometric static pressure regulating damper engineered to maintain system integrity in multi-zone residential and commercial HVAC applications. Built from heavy-duty 22-gauge galvanized steel, this 12" x 12" rectangular bypass damper utilizes a counter-balanced weighted arm to automatically relieve excess static pressure as zone dampers close. By bleeding off excess air, it prevents evaporator coil freeze-ups and high-limit trips while significantly reducing duct noise and high-velocity whistling at the registers. This mechanical bypass solution requires no electrical wiring, making it a reliable choice for HVAC zoning systems. Designed for horizontal duct installation, the SPRD-12X12 supports static pressure settings up to 0.5 in. W.C., ensuring optimal airflow management and consistent CFM delivery across the remaining open zones. For technicians, the adjustable weight allows for fine-tuning the bypass air volume to match specific system requirements and prevent short-cycling of the equipment.

• Automatic Static Control: Self-regulating mechanical operation responds instantly to pressure changes without the need for actuators or sensors.
• System Protection: Effectively prevents high-static conditions that lead to HVAC equipment wear and sensor fault codes.
• Durable Construction: The 22-gauge galvanized steel frame and blade are built to withstand 0°F to 180°F operating temperatures.
• Simple Installation: Designed to fit standard 12" x 12" rectangular ducts with a 5" wide end plate for a secure seal.

• Where should this bypass damper be installed? Best practice is to install the SPRD-12X12 between the supply and return air plenums, ideally at least 6 feet away from the air handler to ensure proper air mixing.
• How do I adjust the pressure setting? The static pressure threshold is adjusted by moving the weight along the hex arm; sliding the weight further out increases the pressure required to open the blade.
• Can this be used in vertical duct runs? While optimized for horizontal mounting, it can be utilized in vertical runs if the counter-balanced weighted arm is field-adjusted to compensate for the weight of the damper blade.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.