Which code applies
Many jurisdictions reference the International Energy Conservation Code for commercial buildings, and local jurisdictions may adopt specific editions or amendments. Confirming the adopted edition with the authority having jurisdiction is an early step on every project.
Prescriptive and performance paths
Commercial projects can generally comply prescriptively, meeting minimum requirements for envelope, HVAC efficiency, lighting power and controls, or through a performance path such as energy modeling or ASHRAE 90.1. The right path depends on the design goals and the building type.
What it means for systems
Energy codes affect equipment efficiency, economizer requirements, duct and pipe insulation, lighting power density and automatic lighting controls. Building these requirements into design from the start avoids late redesign during plan review.
This article provides general information only. Project-specific design requires review by a licensed engineer, and code editions vary by jurisdiction.
