ASHRAE 100-2024 is a technical standard focused on energy and emissions building performance for existing buildings. It is intended to help owners, engineers, and facility teams evaluate building performance in a consistent, recognized way, especially when energy use, emissions, or compliance-related review are part of the project scope. For organizations managing older assets or planning performance improvements, ASHRAE 100-2024 can serve as a practical engineering reference for benchmarking and decision-making. Its value lies in supporting clearer comparisons, stronger documentation, and more disciplined building performance work.

ASHRAE 100-2024 technical scope

As an ASHRAE standard, ASHRAE 100-2024 serves as a recognized technical benchmark rather than general guidance. The title indicates a focus on energy and emissions performance in existing buildings, which makes it relevant to performance assessment, technical review, and building operations planning. Buyers typically use this kind of standard to align internal practices with a published reference when evaluating building conditions, documenting performance, or supporting retrofit and compliance-related discussions. It is most useful when teams need a consistent basis for comparing building performance outcomes.

Where is ASHRAE 100-2024 used?

ASHRAE 100-2024 is commonly used in existing commercial, institutional, and other occupied buildings where energy use and emissions are being reviewed. It may support work by energy managers, HVAC engineers, sustainability teams, facility managers, commissioning agents, and consultants involved in building performance evaluation. The standard can also be relevant during retrofit planning, operational assessments, owner reporting, and technical documentation workflows. Because it addresses existing buildings, it is especially useful where current performance must be measured against a defined engineering reference rather than designed from new-construction assumptions.

Practical value of ASHRAE 100-2024

For day-to-day professional use, ASHRAE 100-2024 helps bring consistency to energy and emissions review work. It can support clearer internal evaluations, better alignment between technical teams, and more reliable documentation for building owners, operators, and reviewers. In practice, that may reduce ambiguity when comparing facilities, prioritizing improvements, or preparing compliance-oriented records. For organizations managing portfolios or single-site assets, the standard can help structure performance discussions and improve the quality of engineering decisions without relying on informal methods.

• Energy and emissions performance focus
• Existing building applications
• Engineering reference for technical review
• Useful for facility and sustainability teams
• Supports benchmarking and retrofit planning
• Aligned with compliance-oriented documentation