Tjernlund Products EF-8 Duct Fan 328140-751 this switch is factory-preset to

this switch is factory-preset to specific water column inches to meet original equipment safety standards

Efficient Scalability: Allows for field-upgradable networking

the 511-044-505 is the specific Weil-McLain part number for this Honeywell gas valve configuration

allowing for ASHRAE-compliant energy savings through setpoint setbacks during unoccupied periods

service single-pack blades include the necessary mounting hardware

Tjernlund Products EF-8 Duct Fan 328140-751 this switch is factory-preset toThe 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