What do "refurbishments" in elevators refer to?

Refurbishments in elevators specifically refer to the process of upgrading or renovating older elevator systems. This can involve a variety of improvements aimed at enhancing the performance, safety, and aesthetics of the existing elevator equipment. Refurbishments often include replacing outdated components, improving technology (such as control systems), and making adjustments to ensure compliance with current safety codes and standards.

This option encapsulates the broader concept of refurbishment, which is not just limited to minor updates or maintenance but involves a comprehensive approach to modernizing existing installations. It may significantly enhance the efficiency of the elevator, extend its lifespan, and improve the overall user experience.

In contrast, the other options address different aspects of elevator service and installation; for instance, installing new elevators refers to completely new setups rather than updating existing ones, and routine maintenance focuses on regular checks and repairs rather than substantial improvements. The replacement of elevator doors alone is too narrow of a focus to adequately represent refurbishment as a whole.