We deliver ASHRAE 90.1 performance-based compliance modelling to demonstrate energy code compliance for commercial and institutional buildings across the United States and Canada. Our models are developed to meet the requirements of Appendix G and Energy Cost Budget methodologies, supporting building permits, authority reviews, and sustainability certifications.

By developing accurate baseline and proposed building models, we quantify energy cost savings and ensure alignment with jurisdiction-specific code adoption. Our approach emphasizes transparency, technical accuracy, and reviewer-ready documentation.

What Is ASHRAE 90.1 Compliance Modelling?

ASHRAE 90.1 compliance modeling is a whole-building simulation approach used to verify that a proposed design meets or exceeds the minimum energy efficiency requirements set by the standard. The process compares a code-compliant baseline building with the actual design to determine compliance and performance improvement.

This method is commonly required for commercial building permits, performance-based energy code pathways, LEED Energy and Atmosphere credits, and utility incentive and rebate programs.

Our ASHRAE 90.1 Compliance Services Include

1. Baseline and Proposed Model Development: Creation of Appendix G–compliant baseline and proposed models based on building geometry, system type, and the applicable ASHRAE 90.1 edition.
2. Energy Cost Budget and Savings Analysis: Calculation of annual energy consumption and energy cost savings to demonstrate compliance with authority requirements.
3. Climate Zone–Specific Modelling: Energy simulations aligned with ASHRAE climate zones and regional weather data for US and Canadian jurisdictions.
4. Code Edition Alignment: Compliance modelling based on the locally adopted ASHRAE 90.1 versions, including 2010, 2013, 2016, 2019, and 2022.
5. Compliance Documentation and Review Support: Clear modelling narratives, assumptions, and summary reports to support plan review, resubmissions, and third-party audits.

Software and Methodology

We use industry-accepted simulation tools recognized by authorities having jurisdiction, LEED reviewers, and utility programs, including eQuest, DesignBuilder (EnergyPlus engine), and IESVE. Tool selection is based on project scale, compliance pathway, and submission requirements.

Applicable Building Types

Offices and corporate facilities, retail and mixed-use developments, warehouses and industrial buildings, educational and institutional buildings, hotels and hospitality projects, and multifamily residential buildings within the ASHRAE 90.1 scope.