A: The DW series has 1/4" mounting holes for fastening to studs.
A: hello the R.O needed is a 1/2" more on the width and height side. This information and more can be found on the specification sheet located in the section Info and Guides.
A: Hello the DW series is for interior use. Please see our ED series for exterior access panel.
A: I installed an access door outside I don’t know if this is the same door however. Painted over it with exterior paint.
A: There is no specific handing to install the door. If you prefer the door to swing right, there would be no issue with installing it to do so.