Which system's condition must home inspectors observe in a residential building?

Home inspectors are required to evaluate all major systems in a residential building, which include the heating, plumbing, and electrical systems, among others. This comprehensive assessment ensures that the property is safe, functional, and meets current building standards. Each system plays a critical role in the overall livability and safety of the home.

The heating system is essential for maintaining a comfortable environment, particularly in colder climates, as it affects indoor air quality and temperatures. The plumbing system is crucial for water supply and waste disposal, directly impacting sanitation and health. The electrical system is responsible for lighting and powering appliances, making it vital for everyday living.

By observing all these systems, home inspectors provide a complete overview of the property's condition, helping potential buyers make informed decisions. This thorough approach is a fundamental part of ensuring the safety and functionality of a residential property.