"Top right corner facing out i installed a computer fan (air in) bottom right rear another computer fan (air out)"

Actually it should be the other way around best case. Top fan should be blowing the hot air out which rises to the top of your grow area and the bottom one should be blowing the cooler air in that's always lower in the room. Otherwise you'r sucking all the warm air all the way down through the plant to get to the air out location. At least that makes common sense to me.