HIGH TEMP FILTERS: AmAir® HT EN779: G4 ASHARE 52.2: MERV 8 Rated Face Velocity: 1.5 - 2.5m/s Rated Initial Resistance: 51 - 110Pa Recomm. Final Resistance: 300Pa Temperature Limits: 260°C Size 12x24x2'' Air Flow: 1,700CMH