Specifications Dimensions in inches. Refer to installation/owner's manual for detailed specifications on installing this product. Hearth & Home Technologies reserves the right to update units periodically. Product installation must adhere strictly to instructions shipped with product. Classic Bay 1200 Insert Classic Bay 1200i Unit Front Width: 28-1/2" Firebox Opening Front Width: 29-1/4" Unit Rear Width: 22" Firebox Opening Rear Width: 22" Unit Front Height: 25-1/2" Unit Height at Opening: 19-1/2" Firebox Height at Opening: 19-1/2" Unit Depth into Firebox: 13" Firebox Depth into Firebox: 13" Unit Depth into Hearth: 11" Viewing Area: 13-7/8" x 11" BTU/Hour Input: 15,500-46,400 Heating Capacity*: 1,000-2,600 sq ft Specification Details Front View Side View Top View Firebox Opening Basic Clearances Front Clearances Heat output will vary depending on the type of fuel used. The flame and ember appearance may vary based on the type of fuel burned and the venting configuration used. Actual product appearance, including flame may differ from image shown. Refer to the Owners Manual for complete clearance requirements and specifications. Product specifications and pricing subject to change without notice. For testing and listing information please refer to the owners/installation manual. *For select products: Heating capacity to be used as a guide only. See your local dealer for help in determining the product that best suits your heating needs based on climate and home efficiency.†For wood-burning appliances: Actual burn times will vary based on how the appliance is operated, load size, moisture content and type of wood used, and installation.