How To Build a Fireplace

want to build a fireplace more or less, that only looks like one but no chimeny and can have a ventless natural gas log set to heat a small room. i really dont like the firebox inserts although thatt would be the easier and logical way to go but i dont like the appearance it gives

YOU DON’T NEED TO BUILD A FIREBOX,THEY MAKE UNITS THAT HANG ON THE WALL, ALL YOU HAVE TO DO IS RUN A 3/8″ GAS LINE TO IT.THEY ALSO MAKE MANTLES TO GO AROUND THE UNIT.TYPE IN VENT FREE FIREPLACES ONLINE YOU WILL FIND ALL YOU NEED…