I runn my exhaust ventilation (carbon filter) 24/7 boath for fresh air and odour controle ..
I also runn a tower fan in ther .. on the floor .. to spread the air around .. I also runn that 24/7
then I also runn a big "normal" table fan .. pointet at my 600W HPS (a foot away or so) .. that is on a timer .. I make it start ½ a hour before lights and let it runn a hour after to cool it down ..
works for me ..