Aluminum / Steel Spiral Duct Supply Grille - Model 4000PF

The model 4000PF is a spiral mounted perforated face grille.  It can be used in a supply or return application.  The supply model would be the 4000PFS and the return would be the 4000PFR.  

• Units can be easily installed in round duct diameters 10" to 48"
• Integral gasket seals provide a tight fit to round duct
• Supply units includes built in extractor to allow accurate balancing and uniform airflow