For no damper, order as example: 291 10 10 Wht
For multi-louver damper, order as example: 293ML 12 12 Wht
For opposed blade damper, order as example: 294OBD 08 08 Wht
5030 Corporate Exchange Blvd. SE
Grand Rapids, MI 49512
P (800) 423-4270
F (800) 626-3825
Map