The luxurious effect created by this fireplace is just as impressive as its heating capacity. Moreover, it is a responsible choice for heating your home and caring for the environment. Large fireplace. Behind its large glass door, the 4.28 cubic foot combustion chamber can hold an impressive 60 lb of wood. Low emissions. This energy efficient fireplace complies with the EPA’s clean-air standards (only 1.6 g/h of emissions). High efficiency. The HE350 fireplace is capable of heating large spaces and burns for 10 hours. A hot start is always your best guarantee for a clean burn. The HE350 uses an automated combustion air intake system that allows the fire to reach an ideal temperature before going into slow burn mode. The result is very low emissions, without the need for a catalytic combustor.