Standard Door Opening Dimensions Diagram | Eco Firebox Inc. #2260172 (License: Personal Use)

The image is a scaled CAD cross-section illustrating a fireplace door opening with critical dimensions labeled: width of 3 feet 2 3/16 inches and height of 2 feet 3 15/16 inches. Red elements represent the firebox frame and surround, while the gray area indicates the hearth/threshold assembly with visible joint lines and depth contours. Annotations include precise fractional inch measurements and a watermark crediting Eco Firebox Inc.

Used on manufacturer or installer webpages for fireplace inserts, this diagram supports product specification pages, installation guides, and contractor resources where users need exact cutout dimensions to ensure proper fit and compliance with safety codes.