For this job, I was performing routine maintenance on a furnace. All electrical components were operating well within manufacture, specifications or safety switches and gas levels were good blower wheel was dirty and needed to get cleaned and there is no surge protection on the system whatsoever. I brought this up with the homeowner. However, we are not taking any steps to fix this at this time. Static pressure of the system is rated for .9. And it is currently sitting right at that limit. I let the customer know about this and call the supervisor to look at solutions as to why this is so high. Currently evaluating.