Generator Frame # Filter Kit # Replacement Filter Set # # of Filters Per Set Change Frequency Otis 82/71 O 82/71 K O 82/71 S 1 end cube 4 months 95 O 95 K O 95 S 1 cresent cube 6 months 115 O 115 K O 115 S 1 cresent cube 6 months Reliance 50/60 R 50/60 K R 50/60 S 6 cubes** 2 months 100 R 100 K R 100 S 6 cubes** 2 months 150 R 150 K R 150 S 6 cubes** 2 months Westinghouse 44 W 44 K W 44 S 4 cubes 6 months 44B W 44B K W 44B S 4 cubes 6 months 44BH W 44BH K W 44BH S 4 cubes 6 months 45 W 45 K W 45 S 4 cubes 6 months 63A W 63A K W 63A S 4 cubes 6 months 63AH W 63AH K W 63AH S 4 cubes 6 months 63AY W 63AY K W 63AY S 4 cubes 6 months 63-9 W 63-9 K W 63-9 S 4 cubes 6 months 63-9A W 63-9A K W 63-9A S 4 cubes 6 months 64AY W 64AY K W 64AY S 4 cubes 6 months 113-7.5 W 113-7.5 K W 113-7.5 S 4 cubes 6 months 113-10.5 W 113-10.5 K W 113-10.5 S 4 cubes 6 months 123 W 123 K W 123 S 4 cubes 6 months 143 W 143 K W 143 S 4 cubes 6 months 153 W 153 K W 153 S 4 cubes 6 months 286A W 286A K W 286A S 4 cubes, 1 ring 6 months **1 cube is needed per change, 6 are included in a set Filter Replacement Pages: Air Filter Engineers, Inc. 2002