6" Silent Inline Duct Fan, 26W, 188 CFM, Quiet Mixed-Flow Energy Efficient Blower for Air Circulation in Ducting, Vents, Grow Tents https://www.amazon.com/dp/B01M2XG0E1/ref=cm_sw_r_cp_api_i_tMaNCbVHH3YCC
I use these with my tent no carbon filter but they work really well surprisingly no heat issues