According to the biblical story, Moses descended from Mount Sinai with the Ten Commandments (or 15 according to the Mel Brooks movie “History of the World”).

He probably did not know that he would spend the next 40 years wandering around in the desert.

What must have become apparent very quickly, however, was that a portable storage container was needed and that it had to be very special considering its contents. The result was very special indeed as the container was built to very precise specifications given to Moses by God himself. The completed vessel that was to carry the stone tablets was, of course, the Ark of the Covenant, a treasure sought by the likes of Hitler or dashing archeologists like Indiana Jones. The mystery deepened in recent years when speculation arose that the Ark was built to be a large electrical capacitor that would give off a lethal jolt of electricity to anyone (presumably not authorized by divine powers) who touched it. No one knows where it is for sure, but some say it is in a church in Ethiopia guarded by a single monk. The story serves as a lesson as to how dangerous capacitors in a home’s HVAC system can be, especially to someone not trained to work with them. There are several capacitors in a typical HVAC system and when they start to fail it will affect the performance of the unit. The low output of cool air, a humming noise, or the intermittent switching off could indicate a capacitor problem. Anyone trying to replace a faulty HVAC capacitor will need to know how to electrically discharge it or face the same fate as biblical Uzzah, who accidentally touched the Ark and was killed by the Lord for his error.

Ductless heat pump