6X6 3 WAY Supply Grills 18" Round Duct Pipe + Product Details Size –

+ Product Details Size – 18"w X 36"h is the size for the duct opening measurement only

+ Product Description This aluminum flex duct is intended to be used in heating

+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 22"h is the size for the duct opening measurement only

Design – Circular air supply valves - designed to be used in low and medium pressure ventilation air conditioning systems

6X6 3 WAY Supply Grills 18" Round Duct Pipe + Product Details Size –6"w X 6"h 3 Way Fixed Curved Blade Air Supply Diffuser Vent Duct Cover Grille Register Sidewall or Cieling High Airflow White 6"w X 6"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 7. 75" Width X 7. 75" Height SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE You may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation