ten burner co2 is this over kill for a 12/12ft room??

i have a sentinel natural gas co2 burner for a 12/12ft room is this to big i have a 24000btu ac cooling room, will this cause to much heat? i understand the bigger the burner the faster co2 can fill room, should i just get a 2 or 4 burner and use the bigger burner for bud room??