I bought a Harman P68 2yrs ago have never been able to circulate the heat out of the basement. I have cut grate in the floor, tried fans in the door casings nothing. I have put 3 thermometers at 3 different locations in the basement,ranging between 90 directly in front to low 70's on the opposite side of basement. The house is 1000 sq ft per floor. At the very least the basement should be unbearable. Any ideas would be appreciated.