Zonefirst ZDS-18X16 18WX16H Parallel 24V 2-Pos S/R Freon The VT series is primarily

The VT series is primarily designed for hot/chilled water and glycol up to 50%

Stable Stem Alignment: Features a 1 3/8-inch spud diameter that ensures a secure fit for threaded packing assemblies

while the backlit LCD display improves visibility in low-light environments

Precision Seating: Features a resilient silicone seat for tight shut-off after lift

Ensuring a secure ground connection and proper polarity is vital to prevent furnace ignition failure or intermittent flame sensing lockout during high-demand heating cycles

Zonefirst ZDS-18X16 18WX16H Parallel 24V 2-Pos S/R Freon The VT series is primarilyThe Zonefirst ZDS 18X16 is a heavy duty, side mount rectangular zone damper engineered for precision airflow management in 24V zoning systems. Featuring an 18W x 16H extruded aluminum frame and parallel blades, this unit is designed for a side mount installation where the motor is located on the height dimension. The parallel blade damper design utilizes 3" blades pivoting on self lubricating bushings, ensuring silent operation and a long service life