Compare that to a completely different device also called a protector. One 'whole house' protector (rated at least 50,000 amps) means everything is protected. For about $1 per protected appliance. Even a direct lightning strike does not damage a properly sized protectors. The spec number (50,000 amps) says so. Significant experience confirms it.
Hi Westom,
Do you have any data to confirm this? Any specific brands?
Thanks.
Gene