Hello Bob the opening is 24 1/2 x 24 1/2 inches. This and additional information can be located on our specification sheet located under Info and Guides on the webpage.
Its close but if you want it to match you have to paint it
It could be 1/2” bigger and you will no problem.
One angle was bend
Martz - yes we can make custom sizes! Please go to your local Home Depot and speak to someone at the Special Order desk to get price and lead times.
It has about a 1/2" overhang on all 4 sides to overlap your drywall. Not really a flange. I installed into a ceiling also, and it's perfect for accessing the AC unit above it.
hello the DW24X24PC-SDL degree of opening is 165.
HBS - you can find all the dimensions listed in your question on the submittal/specification sheet located in the section labeled Info and Guides. Each model has its own dimensional data so it would be best to review each sheet to ensure you have the information for that model.