The Energy Systems Laboratory (ESL) develops technology-driven tools that help organizations evaluate building energy performance, meet energy compliance requirements, manage energy data, and support research initiatives. Our solutions are built to serve diverse stakeholders while advancing energy efficiency and sustainability goals.

From compliance calculators and data platforms to analytical and research applications, ESL tools provide reliable resources that help users make informed decisions and achieve measurable results.

Available Tools

Discover innovative tools developed by the Energy Systems Laboratory to support energy analysis, code compliance, building performance evaluation, data management, and research-driven decision making.

International Code Compliance Calculator logo

International Code Compliance Calculator (IC3)

The International Code Compliance Calculator is a performance-based residential energy code compliance tool. IC3 helps builders, designers, and energy professionals evaluate building energy performance and demonstrate compliance with IECC energy codes efficiently.

Continuous Commissioning - COMPASS logo with skyline

Continuous Commissioning® (CC®) Tools

The Energy Systems Laboratory not only implements Continuous Commissioning®, it also creates CC® technology and tools that can be used in the building commissioning process. The CC® process includes Investigation and Modeling, Implementation and Analysis, and ongoing Commissioning.

Accessibility improvements are in progress ahead of the April 2027 deadline. If you need immediate access, visit our Accommodations page.