The Shelter SF2600 indoor wood furnace is designed to be a whole home heating solution that can be installed as a stand-alone or as an add-on secondary source of heat. The SF2600 is certified to the new 2017 EPA regulations. With its patent-pending clean burn technology, the Shelter SF2600 furnace will burn long, hot and clean while comfortably heating up to 3,000 sq. ft. Burn times up to 12-hours mean less worry between wood loads, allowing more time for you to work, sleep or play. The clean, efficient burn means less chopping of wood with less ash to clean up. Shelter furnaces are designed to deliver years of money-saving comfort, convenience and security.