14" x 14" - 3-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Filter Grille Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 19 3/4" x 1"

+ Product Details Size - 12"w X 28"h is the size for the duct opening measurement only

Whilst the maximum pressure for R410 is 700 PSI

actual front end outer dimensions are approximately 18 5/8" width X 26 5/8" height

Actual Filter Size – 29 3/4"w x 25 3/4" x 1"

14" x 14" - 3-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Filter Grille Actual Filter Size – 11+ Product Details Size 14" X 14" is the size for the duct opening measurement only, actual front end outer dimensions are 3". Design Equipped with lever for full airflow control; back blades made of black plastic for reduced air noise and discreet appearance; "Opposing" back blades, ensuring they don't overlap, provide precise damper control and superior air dispersion. High Quality Aluminum The premium durable aluminum will never rust and it will