Welcome to Registers Direct, your one stop shop for registers, diffusers and grilles!
Most products are listed by the nominal duct size.
Remove your old grille / register cover to reveal the duct opening.
Measure the duct opening.
The width and height of the inside measurements of the grille must match the width and height of the duct opening. For sidewall applications, the width will be the horizontal measurement - the height will be the vertical measurement.
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