What do I check for finish work: know the difference: diffuser, grille, register, return?

Air devices are the visible end points of the duct system. A diffuser usually spreads supply air, a grille is often a fixed face, a register usually includes an integral damper, and returns pull air back to the system.

Stop if

• This air device tag and the opening do not look the same. Can you confirm the device type, frame type, and room before I install it?

Watch out

• Stop if the device tag, size, frame, airflow direction, or room location does not match the approved schedule or drawing.

Check

• Read the tag on the box or wrapper before opening everything.
• Compare neck size to boot/box/opening size.
• Check frame type: lay-in, surface mount, plaster frame, sidewall, linear slot, or louver.
• Dry-fit before screwing if the wall/ceiling is finished.
• Protect the finished face until final install.

Steps

• Read the tag on the box or wrapper before opening everything.
• Compare neck size to boot/box/opening size.
• Check frame type: lay-in, surface mount, plaster frame, sidewall, linear slot, or louver.
• Dry-fit before screwing if the wall/ceiling is finished.
• Protect the finished face until final install.

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