If you're wondering where to hang a ceiling fan for maximum safety, it provides the most ideal air flow when it is hung at least 8-9 feet above the floor. The fan blades must hang at least 7 feet above the floor and 8-10 inches below the ceiling.
Mark checked on the electrical wiring relating to the furnaces to insure that the furnaces are functioning efficiently with respect to one another.
Minor adjustments were made and both furnaces are functioning properly.
Kale suggested that the wiring should be examined by...