What is the expected life cycle, in years, of building automation system within a building structure with a life cycle of 40+ years?

A 1-to-2-year life cycle reflects consumer electronics turnover, not enterprise-grade building automation controllers and field devices.

A 2-to-4-year cycle is too short for commercial BAS deployments, which carry significant installation and commissioning costs that require longer amortization.

BAS components including controllers, sensors, and software platforms become obsolete on a 5-to-7-year cycle as technology evolves, vendor support ends, and integration with newer building systems becomes necessary. This stands in contrast to the structural building life cycle of 40+ years, requiring multiple BAS generations over a building's lifetime. Industry standards and BICSI guidelines recognize this layered life-cycle model for infrastructure planning.

An 8-to-12-year cycle overstates BAS longevity, as software support, network protocol compatibility, and component availability typically degrade well before that point.

A 12-to-15-year cycle is more aligned with mechanical plant equipment life cycles rather than the electronic control and communication layers of a BAS.