2021 International Energy Conservation Code – IECC-2021
The 2021 International Energy Conservation Code® (IECC) sets the baseline for energy-efficient design and construction of new buildings, as well as additions and alterations to existing residential and commercial structures. It features separate residential and commercial provisions and is fully integrated with the 2021 I-Codes for coordinated compliance.
Highlights:
- Divides content into Residential (≤3 stories) and Commercial sections for targeted regulation
- Includes multiple compliance paths: prescriptive, performance-based, and Energy Rating Index (ERI)
- Updated climate zone data affects insulation and system efficiency by region
- New requirements for air barriers, insulation materials, and fenestration U-factor/SHGC
- Enhanced HVAC efficiency standards and ventilation control requirements
- Revised lighting power limits, daylighting controls, and sensor use for commercial spaces
- Strengthened water heating system insulation and controls for energy savings
- Specific provisions for renovations, historic buildings, and changes in use
- Expanded commissioning requirements and documentation protocols
- Optional appendices for solar-ready design and zero energy building frameworks
Who It’s For:
Architects, energy consultants, engineers, and code officials seeking to meet energy efficiency standards for code-compliant, sustainable buildings.
IECC-2021
2021 International Energy Conservation Code – IECC-2021
The 2021 International Energy Conservation Code® (IECC) sets the baseline for energy-efficient design and construction of new buildings, as well as additions and alterations to existing residential and commercial structures. It features separate residential and commercial provisions and is fully integrated with the 2021 I-Codes for coordinated compliance.
Highlights:
- Divides content into Residential (≤3 stories) and Commercial sections for targeted regulation
- Includes multiple compliance paths: prescriptive, performance-based, and Energy Rating Index (ERI)
- Updated climate zone data affects insulation and system efficiency by region
- New requirements for air barriers, insulation materials, and fenestration U-factor/SHGC
- Enhanced HVAC efficiency standards and ventilation control requirements
- Revised lighting power limits, daylighting controls, and sensor use for commercial spaces
- Strengthened water heating system insulation and controls for energy savings
- Specific provisions for renovations, historic buildings, and changes in use
- Expanded commissioning requirements and documentation protocols
- Optional appendices for solar-ready design and zero energy building frameworks
Who It’s For:
Architects, energy consultants, engineers, and code officials seeking to meet energy efficiency standards for code-compliant, sustainable buildings.
IECC-2021
2021 International Existing Building Code – IEBC-2021
The 2021 International Existing Building Code® (IEBC) offers a consistent, performance-based framework for repairing, altering, adding to, or changing the occupancy of existing buildings. It facilitates the reuse of older and historic structures while maintaining safety, accessibility, and code compliance without requiring full adherence to new construction standards.
Highlights:
- Limits storm shelter capacity to specific occupancies; removes travel distance requirement
- Requires IBC Chapter 14/26 compliance for major exterior wall replacements
- Mandates snow load evaluation when structural repairs involve substantial damage
- Applies enhanced classroom acoustics to educational buildings undergoing major alterations
- Permits rooftop equipment additions without full structural review under specific weight/load limits
- Requires seismic evaluation when changing occupancy from S or U to other types
- Exempts furniture like cubicles and shelving from permits and Level 2 classification
- Revises sprinkler installation thresholds for Level 2 and Level 3 alterations in high-risk areas
Who It’s For:
Contractors, architects, and code officials working on renovations, adaptive reuse, and code compliance for existing buildings—especially where full new-construction standards are impractical.
IEBC-2021
2021 International Existing Building Code – IEBC-2021
The 2021 International Existing Building Code® (IEBC) offers a consistent, performance-based framework for repairing, altering, adding to, or changing the occupancy of existing buildings. It facilitates the reuse of older and historic structures while maintaining safety, accessibility, and code compliance without requiring full adherence to new construction standards.
Highlights:
- Limits storm shelter capacity to specific occupancies; removes travel distance requirement
- Requires IBC Chapter 14/26 compliance for major exterior wall replacements
- Mandates snow load evaluation when structural repairs involve substantial damage
- Applies enhanced classroom acoustics to educational buildings undergoing major alterations
- Permits rooftop equipment additions without full structural review under specific weight/load limits
- Requires seismic evaluation when changing occupancy from S or U to other types
- Exempts furniture like cubicles and shelving from permits and Level 2 classification
- Revises sprinkler installation thresholds for Level 2 and Level 3 alterations in high-risk areas
Who It’s For:
Contractors, architects, and code officials working on renovations, adaptive reuse, and code compliance for existing buildings—especially where full new-construction standards are impractical.
IEBC-2021