The house I bought was hit by lightning at some point while it was sitting on the market. It fried the control board in the furnace/AC unit.
I had the whole home surge protection installed when I moved in but I realized this is no guarantee of protection. When there is a storm coming, I unplugged my expensive things such as washer, dryer, and the two power strip that has all my electronics on it (entertainment center and computer desk). If it's really bad lightning, I will flip the switch on my furnace. Unfortunately, that still leaves my refrigerator, dishwasher, microwave, and stove plugged in. I'm not even sure that flipping the light switch for my furnace will completely prevent it. Can it arc across an open switch?
Someday may have a system installed so this is very good information being posted.
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