Nothing is as hot as wood nor gives off as much creosote (chimney fire fodder aka house fire) nor ashes, sparks onto floor
then comes propane, then natural gas in BTUs
Vented logs do offer some benefits but the wise always vents even these.
Unless you have a Direct Vent fire behind glass doors, know that nothing in house - people, pets, plants - prosper from these gases. Quoting Readers Digest study awhile back.
Ten words or less ... a goal unattainable