What skill does the property manager need to have to understand heating, ventilating, and air conditioning (HVAC); structural engineering; waterproofing; plumbing; gas, electric, oil, water, and other utility systems; security systems; elevators and other important building components?

The Property management skill the manager has is Building System Knowledge.

Explanation:

The property manager is more like the caretaker of an apartment. He or she manages tenants that lives in the apartment. Taking care of things like repairs in the house. He is the middleman between the tenants and the landlords. A property manager that

understands how building systems such as heating, ventilating and air conditioning (HVAC) works, that knows about structural engineering; waterproofing; plumbing; gas, electricity, oil, water and how other utility systems such as security systems; elevators and other important building components work have the skill of Building System Knowledge.

enlightenment impacted society by introducing the idea that mankind could use reason to discover the laws of the world and the rights of mankind. these ideals affected all factions of society, from politics to religion.