HVAC
- Filter size and replacement cadence (link or photo of label).
- Furnace switch location; pilot / reset quirks if any.
Water & power
- Main water shutoff (photo arrow on pipe).
- Electrical panel legend (photo of door chart or typed list).
Network & appliances
- Router / mesh nodes: which wall ports matter.
- Appliances with non-obvious steps (induction boost, humidifier refill, oven timer).