Adopts With Amendments
Chapter 3
General Requirements
International Energy Conservation Code 2021
[F] 301.1 Scope
Section 301.1 — Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 301.1.1 Climate Zone Determination
Section 301.1.1 — Climate Zone Determination. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 301.2 Warm Humid Counties
Section 301.2 — Warm Humid Counties. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 301.3 Climate Zone Determination
Section 301.3 — Climate Zone Determination. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 301.4 Tropical Climate Zone
Section 301.4 — Tropical Climate Zone. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 302.1.1 Design Conditions
Section 302.1.1 — Design Conditions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.1 Climate Zones
Section C301.1 — Climate Zones. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.1.1 Climate Zone Determination
Section C301.1.1 — Climate Zone Determination. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.10 Climate Zone 5
Section C301.10 — Climate Zone 5. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.11 Climate Zone 6
Section C301.11 — Climate Zone 6. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.12 Climate Zone 7
Section C301.12 — Climate Zone 7. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.13 Climate Zone 8
Section C301.13 — Climate Zone 8. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.2 Warm Humid Counties
Section C301.2 — Warm Humid Counties. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.2.1 Climate Zone Assignment
Section C301.2.1 — Climate Zone Assignment. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.3 International Climate Zone Definitions
Section C301.3 — International Climate Zone Definitions. This section provides definitions relevant to the code. Defined terms have specific meanings that affect how requirements are applied throughout the code. Refer to the official code text for complete requirements.
[F] C301.3.1 Warm-Humid Zone
Section C301.3.1 — Warm-Humid Zone. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.4 Warm-Humid Designation
Section C301.4 — Warm-Humid Designation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.5 Climate Zone 0
Section C301.5 — Climate Zone 0. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.6 Climate Zone 1
Section C301.6 — Climate Zone 1. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.7 Climate Zone 2
Section C301.7 — Climate Zone 2. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.8 Climate Zone 3
Section C301.8 — Climate Zone 3. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C301.9 Climate Zone 4
Section C301.9 — Climate Zone 4. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C302.1 Interior Design Conditions
Section C302.1 — Interior Design Conditions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C302.2 Warm Humid Classification
Section C302.2 — Warm Humid Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] C302.3 Climate Zone Map
Section C302.3 — Climate Zone Map. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C303.1 Identification and Installation
Section C303.1 — Identification and Installation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C303.1.1 Insulation Product Rating
Section C303.1.1 — Insulation Product Rating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C303.1.2 Insulation Mark
Section C303.1.2 — Insulation Mark. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C303.1.3 Fenestration Product Rating
Section C303.1.3 — Fenestration Product Rating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C303.1.4 Fenestration Product Rating
Section C303.1.4 — Fenestration Product Rating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C303.1.5 Fenestration Product Testing
Section C303.1.5 — Fenestration Product Testing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C303.1.6 Skylight U-Factor
Section C303.1.6 — Skylight U-Factor. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C303.2 Installation Commercial Insulation
Section C303.2 — Installation Commercial Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C303.2.1 Fenestration Product Rating
Section C303.2.1 — Fenestration Product Rating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C303.2.2 Protection from Damage
Section C303.2.2 — Protection from Damage. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C303.3.1 Maintenance Access
Section C303.3.1 — Maintenance Access. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.1 Building Envelope Requirements
Section C402.1 — Building Envelope Requirements. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C402.1.3 Opaque Assembly U-Factor
Section C402.1.3 — Opaque Assembly U-Factor. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.2 Roof Insulation
Section C402.2 — Roof Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C402.2.1 Roof Solar Reflectance
Section C402.2.1 — Roof Solar Reflectance. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.3 Opaque Wall Insulation
Section C402.3 — Opaque Wall Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C402.4 Fenestration
Section C402.4 — Fenestration. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.4.3 Fenestration U-Factor Commercial
Section C402.4.3 — Fenestration U-Factor Commercial. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.4.4 Fenestration SHGC
Section C402.4.4 — Fenestration SHGC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.5 Air Leakage Commercial
Section C402.5 — Air Leakage Commercial. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.5.1 Air Barrier Installation
Section C402.5.1 — Air Barrier Installation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C402.5.2 Air Barrier Materials
Section C402.5.2 — Air Barrier Materials. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] C403.1 Mechanical System Efficiency
Section C403.1 — Mechanical System Efficiency. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C403.11 Energy Recovery
Section C403.11 — Energy Recovery. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C403.3 Heating and Cooling Equipment
Section C403.3 — Heating and Cooling Equipment. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C403.4 HVAC Controls
Section C403.4 — HVAC Controls. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C403.4.1 Thermostat Requirements
Section C403.4.1 — Thermostat Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C403.5 Economizers
Section C403.5 — Economizers. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C403.6 Simultaneous Heating and Cooling
Section C403.6 — Simultaneous Heating and Cooling. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C403.7 Duct and Plenum Insulation
Section C403.7 — Duct and Plenum Insulation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C403.7.1 Duct Sealing
Section C403.7.1 — Duct Sealing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] C403.8 Piping Insulation
Section C403.8 — Piping Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] C404.1 Service Water Heating Efficiency
Section C404.1 — Service Water Heating Efficiency. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] C404.2 Service Water Heating Pipe Insulation
Section C404.2 — Service Water Heating Pipe Insulation. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] C404.5 Solar Water Heating
Section C404.5 — Solar Water Heating. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] C405.1 Lighting Power General
Section C405.1 — Lighting Power General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C405.2 Lighting Controls
Section C405.2 — Lighting Controls. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C405.2.1 Occupancy Sensors
Section C405.2.1 — Occupancy Sensors. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] C405.2.3 Daylight Responsive Controls
Section C405.2.3 — Daylight Responsive Controls. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C405.3 Interior Lighting Power
Section C405.3 — Interior Lighting Power. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C405.4 Exterior Lighting Power
Section C405.4 — Exterior Lighting Power. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C406.1 Additional Efficiency Package
Section C406.1 — Additional Efficiency Package. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] C407.1 Total Building Performance
Section C407.1 — Total Building Performance. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R301.1 Climate Zones
Section R301.1 — Climate Zones. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R301.1.1 Climate Zone Determination
Section R301.1.1 — Climate Zone Determination. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R301.2 Warm Humid Counties
Section R301.2 — Warm Humid Counties. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R301.3 International Climate Zone Definitions - Residential
Section R301.3 — International Climate Zone Definitions - Residential. This section provides definitions relevant to the code. Defined terms have specific meanings that affect how requirements are applied throughout the code. Refer to the official code text for complete requirements.
[F] R301.4 Residential Climate Zone Determination
Section R301.4 — Residential Climate Zone Determination. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R302.1 Insulation and Fenestration Requirements
Section R302.1 — Insulation and Fenestration Requirements. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R303.1 Fenestration Product Rating
Section R303.1 — Fenestration Product Rating. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R303.1.1 Residential Insulation Identification
Section R303.1.1 — Residential Insulation Identification. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R303.1.5 Insulation Product Testing
Section R303.1.5 — Insulation Product Testing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R303.2 Protection of Insulation
Section R303.2 — Protection of Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R303.2.1 Slab-on-Grade Insulation
Section R303.2.1 — Slab-on-Grade Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.1 General - Residential Building Envelope
Section R402.1 — General - Residential Building Envelope. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.1.2 R-Value Insulation Table
Section R402.1.2 — R-Value Insulation Table. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.2 Residential Ceiling Insulation
Section R402.2 — Residential Ceiling Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.2.3 Eave Baffle
Section R402.2.3 — Eave Baffle. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R402.3 Residential Wall Insulation
Section R402.3 — Residential Wall Insulation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.4 Residential Air Leakage
Section R402.4 — Residential Air Leakage. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R402.4.1 Building Envelope Sealing
Section R402.4.1 — Building Envelope Sealing. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.5 Maximum Fenestration U-Factor - Residential
Section R402.5 — Maximum Fenestration U-Factor - Residential. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R402.6 Basement Wall Insulation - Residential
Section R402.6 — Basement Wall Insulation - Residential. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.7 Slab-on-Grade Insulation - Residential
Section R402.7 — Slab-on-Grade Insulation - Residential. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] R402.8 Floors Over Outdoor Air - Residential
Section R402.8 — Floors Over Outdoor Air - Residential. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R403.1 Residential HVAC Systems - Controls
Section R403.1 — Residential HVAC Systems - Controls. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R403.10 EV-Ready - Residential
Section R403.10 — EV-Ready - Residential. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R403.2 Residential Ducts
Section R403.2 — Residential Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R403.3 Residential Mechanical System Piping
Section R403.3 — Residential Mechanical System Piping. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R403.4 Residential Mechanical Ventilation
Section R403.4 — Residential Mechanical Ventilation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R403.5 Residential Service Hot Water Systems
Section R403.5 — Residential Service Hot Water Systems. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] R403.6 Residential Equipment Sizing
Section R403.6 — Residential Equipment Sizing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R403.7 Snow Melt and Ice Systems
Section R403.7 — Snow Melt and Ice Systems. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R403.8 Residential Pools and Spas
Section R403.8 — Residential Pools and Spas. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R403.9 Solar-Ready Zone - Residential
Section R403.9 — Solar-Ready Zone - Residential. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R404.1 Residential Lighting
Section R404.1 — Residential Lighting. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R405.1 Simulated Performance Alternative
Section R405.1 — Simulated Performance Alternative. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R406.1 Energy Rating Index Compliance
Section R406.1 — Energy Rating Index Compliance. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.