1500 Sq Ft. Pellet Stove Hopper Extension 1500 Sq Ft Pellet Stove Hopper Extension Increase your 40 lb. Pellet Stove capacity to 100 pounds! That's a whole 2 1/2 bags worth! 150% longer burn time gives you freedom from constantly feeding the stove! Less dust, dirt and work from less frequent fillings!!!!! Fits Popular 1500 Sq Ft Models Listed Below