ZoneFirst SPRD-10 Barometric Static Pressure Regulating Damper
The ZoneFirst SPRD-10 is a 10-inch round barometric static pressure regulating damper engineered to maintain balanced airflow in multi-zone HVAC systems. Operating entirely without electricity, this passive damper responds automatically to changes in duct static pressure, opening and closing as zone dampers cycle to keep system pressure within an optimal range. The result is quieter operation, reduced strain on the air handler, and longer equipment life.
How It Works
As zone dampers close and duct static pressure rises, the SPRD-10 modulates open to relieve excess pressure — protecting the blower, minimizing noise, and preventing comfort complaints caused by over-pressurized supply trunks. When pressure drops, the damper closes to redirect airflow where it’s needed most. No actuator, control board, or wiring is required.
Key Features
- 10-inch round duct connection for easy inline installation
- Barometric (passive) operation — no power source required
- Self-regulating design responds automatically to duct static pressure changes
- Ideal for use in residential and light commercial HVAC zoning applications
- Helps protect air handlers and blower motors from high static pressure damage
- Reduces system noise caused by excessive duct pressure
- Compatible with all standard ZoneFirst and multi-zone control systems
- Durable construction for long-term, low-maintenance performance
Application
The SPRD-10 is the ideal bypass solution for zoned forced-air systems where a powered bypass damper is not required or desired. Install it in a bypass duct between the supply and return plenums to automatically relieve pressure buildup whenever zone dampers restrict airflow. It is well-suited for residential new construction, retrofit zoning projects, and light commercial applications.
Specifications
- SKU: SPRD-10
- Brand: ZoneFirst
- Duct Size: 10 inches (round)
- Operation Type: Barometric / Passive
- Power Required: None
- Application: HVAC Zoning Static Pressure Bypass
