The built environment accounts for approximately 40 percent of global carbon dioxide emissions, with existing buildings representing the vast majority of this impact. While new construction increasingly incorporates sustainable design principles, the existing building stock—comprising over 5.9 million commercial buildings and 140 million residential structures in the United States alone—presents both the greatest challenge and the most significant opportunity for meaningful carbon reduction. This comprehensive course equips building professionals with the knowledge and strategies necessary to transform existing buildings from carbon liabilities into high-performance assets that support global decarbonization goals.

Building decarbonization encompasses far more than simple energy efficiency improvements. It requires a systematic approach that addresses building envelope performance, mechanical system electrification, renewable energy integration, and operational optimization. According to the U.S. Department of Energy, deep energy retrofits can reduce building energy consumption by 30 to 50 percent, while full electrification combined with renewable energy can achieve near-zero operational carbon emissions. The International Energy Agency estimates that to meet Paris Agreement targets, the global building sector must achieve an average emissions intensity reduction of 50 percent by 2030.

This course bridges technical knowledge with practical implementation strategies, examining proven decarbonization approaches applicable to commercial offices, multifamily residential buildings, healthcare facilities, and educational institutions. Participants will learn how to conduct comprehensive building assessments, prioritize retrofit measures, navigate financial incentive programs, and develop phased implementation plans that minimize occupant disruption while maximizing environmental and economic returns.

Course Topics

• Understanding Building Decarbonization: Climate imperative, operational vs. embodied carbon, regulatory landscape, and business case
• Building Energy Audits: ASHRAE audit framework, utility data analysis, energy use intensity, and baseline modeling
• Building Envelope Improvements: Thermal insulation upgrades, window replacement, glazing technologies, and air sealing strategies
• HVAC Electrification: Heat pump technologies, VRF systems, geothermal applications, and domestic hot water electrification
• Building Automation: Controls optimization, demand-controlled ventilation, and smart building integration
• Implementation Strategies: Phased approaches, financial incentives, PACE financing, and performance tracking

Target Audience

• Mechanical engineers and HVAC professionals
• Facility managers and building operators
• Architects and sustainability consultants
• Energy managers and commissioning agents
• Building owners and real estate professionals
• Environmental engineers and sustainability professionals

Course Benefits

• Gain comprehensive knowledge of building decarbonization strategies and technologies
• Learn practical implementation approaches from industry best practices
• Understand financial incentives and financing mechanisms for retrofit projects
• Prepare for evolving building performance standards and regulations
• Enhance professional credentials with specialized sustainability knowledge
• Flexible learning format accommodates busy professional schedules

Learning Objectives:

• Define building decarbonization and explain its significance within the context of global climate change mitigation, distinguishing between operational and embodied carbon and identifying the primary sources of building-related emissions.
• Describe building energy audit methodologies including ASHRAE Level I, II, and III audits, and explain how baseline energy modeling establishes the foundation for measuring decarbonization progress.
• Identify building envelope improvement strategies including insulation upgrades, window replacements, and air sealing techniques, and quantify typical energy savings and carbon reduction potential for each approach.
• Explain HVAC electrification strategies including heat pump technologies, variable refrigerant flow systems, and geothermal applications, and evaluate their appropriateness for different building types and climate zones.
• Describe renewable energy integration options including rooftop solar photovoltaics, building-integrated systems, and power purchase agreements, and calculate expected generation and carbon offset potential.
• Identify financial incentives, utility rebate programs, and financing mechanisms available for building decarbonization projects, including federal tax credits, state programs, and green bonds.
• Develop phased implementation strategies that sequence decarbonization measures to maximize carbon reduction while minimizing costs, operational disruption, and implementation risks.
• Evaluate building performance tracking and measurement protocols including ENERGY STAR Portfolio Manager and establish verification procedures to document decarbonization achievements.