Without Everything On I Arrived Mid Day & It Was Like 72 Degrees Inside!! The 10 " Blower Is Exhausting The Room W/ Insalated Ducting Clamped & Taped ! I Even Duc Taped The Edge Of The Glass Panel So The Hoods Are Air Tight .. I Have 2 Wall Mounted Fans Also ! Keep In Mind Its About 11am & Its 87 Degrees Out.........