HVAC Premium Supreme Quality Adjustable Supply Diffusers Clean Recessed Screw Holes Our Supply Diffusers are made with beautiful recessed screw holes to add a clean, polished aesthetic to your space. Adjustable Fins and Back Damper Take control over the direction and intensity of your airflow with our Supply Diffuser individually adjustable fins and back damper with louvers that can be controlled with one easy to use lever. Screws Included Just Screw into your wall and that's it! ACTUAL FRONT END OUTER DIMENSIONS ARE [INNER GRILLE SIZE] + [1.75] 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 of you air system. These grilles and registers give you an extra measure of quality that you can point out to your family members and house guests. Some of our best features aren’t readily apparent, but you’ll appreciate the benefits over a long period of time. This grille has a high standard of design, production and finish on all products. Every part is hand inspected for quality before it is packaged, no exceptions. Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment Easy Unrestricted Air Flow. How To Measure A Grille Overall Size: Measure the size of the air duct/drywall opening. Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Every grille has a front end frame, that will overlap at wall joint. Total outer size of this grille is; listed size +1.75" at the width, and +1.75" at the height. Width vs Height The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 20" wide by 14" tall, order a 20x14. If your hole is 14" wide by 20" tall, order a 14x20. ACTUAL FRONT END OUTER DIMENSIONS ARE [INNER GRILLE SIZE] + [1.75] 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 of you air system. These grilles and registers give you an extra measure of quality that you can point out to your family members and house guests. Some of our best features aren’t readily apparent, but you’ll appreciate the benefits over a long period of time. This grille has a high standard of design, production and finish on all products. Every part is hand inspected for quality before it is packaged, no exceptions. Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment Easy Unrestricted Air Flow. How To Measure A Grille Overall Size: Measure the size of the air duct/drywall opening. Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Every grille has a front end frame, that will overlap at wall joint. Total outer size of this grille is; listed size +1.75" at the width, and +1.75" at the height. Width vs Height The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 20" wide by 14" tall, order a 20x14. If your hole is 14" wide by 20" tall, order a 14x20. Material Steel Installation Method Sidewall, Ceiling Included Components Screws, Back Damper Manufacturer HVAC Premium FAST Shipping & Handling With strategically placed warehouses in every state and in every major metropolis area, we can get you your product, faster and safer. Less traveling means less chances to break or bend.