Tjernlund Products EF-8 Duct Fan 321702-401 the 174A series is specifically

the 174A series is specifically designed for hot water heating boiler applications

Always provide a drip loop in the capillary to prevent moisture from reaching the switch and avoid sharp bends that could compromise the liquid-fill charge

using a genuine HVAC pressure switch like the S1-025-42674-000 ensures the refrigeration components operate within factory-specified parameters

When diagnosing a cracked or fouled **evaporator coil pan**

000V secondary output with 23mA

Tjernlund Products EF-8 Duct Fan 321702-401 the 174A series is specificallyThe Tjernlund EF 8 Duct Fan is a performance driven solution for addressing airflow deficiencies in residential and commercial 8 inch round ductwork. Engineered to deliver up to 325 CFM, this axial duct booster compensates for static pressure drops in long branch runs, ensuring consistent thermal distribution in hard to heat or cool areas. Constructed with a 24 gauge galvanized steel housing and a high velocity aluminum prop fan, the EF 8 is built for