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