ZoneFirst SPRD-20X8 Damper

The ZoneFirst SPRD-20X8 is a heavy-duty barometric bypass damper engineered for precise static pressure regulation in multi-zone residential and light commercial HVAC systems. This 20" x 8" mechanical unit utilizes a field-adjustable weighted arm to facilitate effective bypass air management without the requirement for complex electronic controls or wiring. As zone dampers close and duct pressure rises, the ZoneFirst SPRD-20X8 automatically opens to divert excess airflow to the return plenum, preventing high-limit trips and evaporator coil freeze-ups. This HVAC zone system component is built with galvanized steel and features low-friction bushings to ensure smooth blade operation and long-term reliability. By maintaining consistent static pressure, it effectively reduces air noise at the registers and protects the blower motor from excessive backpressure. For contractors, this provides a simplified, "set-and-forget" solution for balancing airflow across various duct configurations.

• Mechanical weighted arm allows for granular field adjustment of static pressure thresholds.
• Eliminates the need for actuators or electrical runs, reducing total installation time and complexity.
• Engineered with heavy-gauge galvanized steel for structural integrity in high-velocity bypass runs.
• Protects system components by preventing excessive static pressure buildup during single-zone calls.

Where is the best location to install the SPRD-20X8?

It should be installed in a bypass duct connecting the supply trunk to the return air plenum. Ensure it is placed after the blower but before any individual zone dampers.

How do I calibrate the pressure setting on this barometric damper?

Adjustment is handled by sliding the weights along the external arm. Technicians should use a manometer to verify that the damper opens at the correct static pressure setpoint for the specific air handler.

Does this unit require a power open/power close motor?

No, this is a purely barometric device that operates based on air pressure differentials, making it an ideal choice for simplified system designs.

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.