Ceiling Boxes from The Duct Shop are the perfect fitting to use when you need to put a register in the ceiling to supply air into your room. All Ceiling Boxes are manufactured from the highest of quality galvanized steel. Sizes listed are the box opening first and second, then the round size third. They have a plaster ground flange installed for easy finishing to your plaster or drywall.
Installation Tip — Attach the ceiling box securely to the ceiling framing with nails or screws. In many applications where your duct is laying on the ceiling members, you may want to attach a 90 degree elbow to the round collar on the ceiling box and then attach your Flexible Duct or Sheet Metal Duct to the elbow. This will provide the best possible airflow for your systems efficiency. We recommend that you seal the seams with a duct sealant after installation to prevent any air leakage, increase the efficiency of your system and reduce your utility bills. See installation tip for Flexible Duct or Sheet Metal Duct, depending on which type you will be attaching to.