Tubing, PVC can easily be replaced/Installed by your installer unless they are long runs or difficult access. I installed the 2 inch PVC pipe myself with a 45 at top in the attic along with a pull string for easy future pulls.
I have installed many fan switches and APs in very hot warehouses so I do understand they can work, even though I remember having to replace a few when they died. So if you just have just a switch in the attic, you should be find if humidity is not a problem. Of course make sure the switch has fan(s) and good air flow. Still might want to think about backup power, especially for security cams, especially if your electrical panel is easily accessible. Thinking Security, you have to think like a thief, cut power, cut Internet access, (old school cut telephone lines). find and steal NVR, etc.
, ok those may not always apply, maybe I watch to many movies
When we moved in our neighborhood, a new neighbor shared some break in stories, one was thieves would come as yard crew, one guy would start mowing the front yard while the others headed to the back and came out with black garbage bags full of your belongings. FYI,
@samplenhold it was in Spring, TX., probably why you have 18 Cams
I still mow my own yard so if a crew is in front of my house, call the police
Funny but only the old guys in our neighborhood mow their own lawns, lol...
You are definitely in the right Forum, best the world in my opinion. So much great knowledge here, I would definitely recommend, as other have, read through the
Cliff Notes, I know it is long but it answered the majority of my questions. There is just so many things to consider that I never thought of, waterproofing, spiders
, etc.