The cutout (hole) dimensions required for the Covenant 36" SLIM Electric RV Fireplace (model LFP36-CS) are 32.375 inches wide by 9.625 inches high by 6.625 inches deep. This is the size of the opening needed in your wall or cabinet. The overall unit dimensions including the trim/lip are 36 inches wide by 9.625 inches high by 7 inches deep. The trim overlaps the cutout by approximately 1.8 inches on each side, with minimal height overlap since the overall height matches the cutout height. The fireplace is not made of real wood but is constructed from durable materials designed for long-lasting use. It is not recommended to cut or modify the unit, as doing so could compromise its integrity and safety.