Alderlea T4 LEAlderlea T4 LE Cast Iron Wood Stove For Small to medium rooms The Alderlea T4 LE incorporates all the features of a true Alderlea woodstove: a huge glass window for a clean view of the flame, a warming top, efficient heat output and unmatched ease of use. Its a powerful, reliable source of heat with old world charm and unmatched durability. Features Technical Data 56,000 BTU Cord Wood 23,200 BTU EPA Test Fuel Efficiency (HHV) 72% Emissions 1. 9 gm hr.