"Our best-selling pellet stove, the ComfortBilt HP22 is popular because of its modern appearance, large bay view window, programmable 7 day internal thermostat, and powerful heat output. Its superior engineering and reliability have earned our flagship model consistently great reviews from customers all across the country.,Certified 41,000 BTU output will heat a 2,800 ft² or more if temperatures are mildEPA and CSA Certified to comply with all federal emissions mandates55 pound hopper capacity; ashes fall automatically into a large removable ash panRear mounted 3"""" standard  exhaust port, and 2"""" standard air intakeHeat exchanger design and powerful room blower produce maximum heat from pellets Model Number: HP22-Black. Age Group: adult."