ZoneFirst SPRD-14 Damper 321894-709 the 99K70 offers a precision

the 99K70 offers a precision fit to restore factory-rated flow rates and pressure head requirements

if the current is below 1

it maintains the integrity of the HVAC high-limit circuit and protects against restricted airflow issues commonly caused by clogged filters or blower failures

allowing technicians to fine-tune downstream pressure with extreme accuracy

25-inch shank and is engineered for both residential and commercial units that utilize LP gas

ZoneFirst SPRD-14 Damper 321894-709 the 99K70 offers a precisionThe ZoneFirst SPRD 14 Damper is a 14 inch round barometric static pressure regulating damper designed for high performance HVAC zoning. In a multi zone system, as individual zone dampers close, duct static pressure naturally increases. This barometric relief damper utilizes a single blade, counter balanced weighted arm to automatically compensate for this excess pressure, preventing coil freeze ups and high limit trips. Specifically engineered for