The beautiful Castile Pellet Insert delivers enough warmth to heat most living rooms, great rooms and family rooms. Even better, it’s efficient, self-lighting and easy-to-use. Define your favorite room; let the Castile provide the style and comfort. 30,600 BTUs – heats 700 to 1,800 square feet, based on climate and home efficiency. EPA certified, with low emission levels of 1.1 grams per hour. Patented feed system for jam-free operation.