Description
Snap-Rite 12" x 12" R-6 Foil Top Insulated Register Box
The Snap-Rite 12X12-3800FG is a 12 x 12 inch register box (duct boot) from the 3800 series, built for ceiling and wall supply outlets where the box sits in unconditioned space. The top is foil-faced duct board, so you cut the inlet hole exactly where the run lands and fasten a start collar sized for the flex duct you are using. The box is factory insulated to R-6, which keeps the cold air inside the box and helps prevent the sweating and ceiling stains you get from bare metal boots in humid attics.
Built for a clean finished opening
- Register opening: 12 x 12 inches, to match a 12 x 12 grille or register
- Outer box is about 2-5/8" larger than the register size (14.625 x 14.625 in) and about 4-3/8" deep
- 1/2" drywall flange for a tight, square finish against the ceiling or wall
- Factory gasket on the flange to seal the box to the drywall and stop air leakage around the register
- 12-hole cluster pattern for register screws, black interior so the box disappears behind the grille
- 30-gauge wrapper; duct board top accepts R-4.2, R-6 or R-8 collar insulation
Choosing the right box
Match the box to the register size first, then pick a start collar that matches your branch duct diameter. The gasketed version is the better choice where your local code or a duct leakage test calls for sealed boots.
