The Model 74 is a non-catalytic wood burning stove designed to meet the most stringent emissions standards without the use of a catalytic combustor. Model 74 has a BTU rating of 13,300-52,400 and can heat up to 2600 square feet. The 74 delivers heavy duty heat performance and is available as a masonry and pre-fab fireplace insert or freestanding unit. Ask about other options.