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 Width: 28-1/2" Height: 25-1/2" Depth: 24" Extension onto Hearth: 11" BTU/hr Input1: 15,500-46,400 Heating Capacity2: 1,000-2,600 sq ft Hopper Capacity3: 75lb Viewing Area: 153 sq in Efficiency4: 78% Emissions: 1.3 g/hr 1 BTU/hr Input based on maximum feed rate per hour multiplied by approximately 8600 BTU, which is average BTU from a pound of pellets. 2 This is a general guide, see your local Quadra-Fire dealer for help in determining the product that best suits your heating needs based on climate, home efficiency, location of the heater, and air movement in the room. 3 Fuel density and pellet shape will affect hopper capacity. 4 EPA Default Efficiency. Specification Details Front View Side View Top View Basic Clearances - Built-in Front Clearances Firebox Opening 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 owner's 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.