Traditional Functional
Product Description
Knob-operated worm gear adjusts patented butterfly valve - only 2 1/2 turns to full open or close. Controls volume - not air pattern minimum air restriction. Galvanized, unpainted steel damper, to be used with 5000 collar Includes adjusting handle.
MEASURING INSTRUCTIONS: AmeriFlow registers, grilles and diffusers are designed to fit standard duct openings. For floor applications, measure both the width and length of the existing duct opening. An opening of 4"x10" requires a 4x10 register. When ordering sidewall/baseboard products, specify the horizontal dimension first.
MEASURING INSTRUCTIONS: AmeriFlow registers, grilles and diffusers are designed to fit standard duct openings. For floor applications, measure both the width and length of the existing duct opening. An opening of 4"x10" requires a 4x10 register. When ordering sidewall/baseboard products, specify the horizontal dimension first.
