Whole home surge protector

I haven’t but I plan to do in the near future. I’ve already discussed with my electrician and he said he’d install it when he’s back at the house to do some electrical associated with interior renovations. And like you I’m thinking I’ll install the Siemens FS140. With all the circuit boards into today’s appliances including HVACs I think it’s a good idea.

Reading more about them, you want to make the wiring from the unit to the 2-pole breaker as short as possible to make sure it is fast enough for lightning. The breaker should be in the first slot where the power comes in. Also, how long they last depends on the amount and strength of the surges it sees. There's a red light on this one that will flash if it is no longer working. Install looks like it can be a DIY project.

They had some on the clearance table at Lowes a few years back. I installed one on each of my boxes.
After a storm last year one failed. I didn't lose any appliances. My neighbor did though. So possibly it did its job and saved me from a surge.

I still don't get how it works though. They are on breakers they aren't inline to the source like a GFCI or Arc fault is.

years ago, i had lightning hit my neighbors house.... it blew out a few things in my house.... but it came through the cable line, not the power line. food for thought.