Kozy Heat Airtight build in Wood stoves  EPA Certified Z 42 zero-clearance woodburning fireplace  6" chimney offers additional cost cutting savings and convenience.    NON EPA  231 ZC 65,000 BTU/hr Input It’s the two-in-one fireplace system. You choose whether you want the warmth and charm of old-fashioned wood or the convenience and reliability of gas. So you get the best of both worlds in one heavy-duty quality fireplace.