I’m not sure these are the best examples. Your appliances are UL listed and interact with an electrical grid that is heavily regulated. Other than their extrem

I’m not sure these are the best examples. Your appliances are UL listed and interact with an electrical grid that is heavily regulated. Other than their extremely simple interface with that system (and your plumbing in the case of the washing machine) they entirely self contained. If your windows do keep out the rain, they do so because they were installed properly within a much larger system of overlapping parts. Even on new construction subject to inspection, failures in this system commonly evade detection until after they have done years of damage.