The ZoneFirst SPRD-18 functions as a 18″ round static pressure damper which serves to control airflow in HVAC systems. The systemsoperates through ductwork pressure control to achieve system performance. The control systemsautomatically responds to shiftin
- Zero-Risk Assurance: Full-Refund Policy
- Free Delivery on 30+ Orders
- 60-Day Hassle-Free Returns
