A whole building retrofit is a comprehensive upgrade of an existing structure’s energy systems, envelope, and mechanical components to improve efficiency and performance. This coordinated approach simultaneously addresses HVAC systems, insulation, windows, lighting, controls, and renewable energy installation rather than tackling individual components separately. Retrofits typically reduce energy consumption by 30 to 50 percent.
Technical Details
Retrofits involve detailed energy audits using blower door tests and thermal imaging to identify air leakage points, conducting ASHRAE Level 2 or 3 assessments, and specifying upgrades that meet current codes and standards. Common upgrades include replacing equipment with ENERGY STAR certified units, upgrading to R-30 to R-40 insulation in attics, and installing windows rated U-0.30 or lower.
Practical Significance
Coordinated retrofits reduce operational costs significantly and improve occupant comfort through better temperature control, humidity management, and indoor air quality. They extend building life, increase property value, and support decarbonization goals when paired with renewable energy systems like solar arrays.