Home network notes.
Important! Two different types of in-wall cable: plenum cable, designed to be run through ventilation ducts, and riser cable. The first has more stringent fire-code standards, the second less so but still more stringent than ordinary stranded patch cable.
20180517/https://en.wikipedia.org/wiki/Plenum_cable
Also, plenum cable is required for schools and hospitals under all circumstances. So if you have a question of whether to buy both plenum cable and riser cable, just go with plenum cable if there is such a requirement.
20180517/DuckDuckGo does plenum cable need to be used for cables that
run beside a heat vent
20180517/https://www.ecmag.com/section/systems/plenum-vs-non-plenum