Chemco 17.38"x23.38"x2.19" 100% Cellulose Final FilterRequired minimum quantity: 2 Maximum quantity: 50 These 2nd stage, final filter panels are rated as 90 95% ASHRAE filters and are made with 100% cellulose media and a urethane, sealing gasket attached to the downstream side of its metal framework. Using ASHRAE Standard 52? 76 test procedure, these filters have shown to be 99. 95 % efficient with particle sizes 0. 5 micron and above. These 2. 19 thick, final filter panels are rated for 1700 cfm air
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Chemco 17.38"x23.38"x2.19" 100% Cellulose Final Filter