Adopts With Amendments
Chapter 6
Duct Systems
International Mechanical Code 2021
[F] 601 Duct Systems General
Section 601 — Duct Systems General. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.1 Scope - Duct Systems
Section 601.1 — Scope - Duct Systems. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 601.1.1 Duct Systems General
Section 601.1.1 — Duct Systems General. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.1.2 Duct Material Requirements
Section 601.1.2 — Duct Material Requirements. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.1a HVAC Equipment General
Section 601.1a — HVAC Equipment General. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.2 Duct System Installation
Section 601.2 — Duct System Installation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.2.1 Duct Material Classification
Section 601.2.1 — Duct Material Classification. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 601.3 Contamination Prevention
Section 601.3 — Contamination Prevention. 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] 601.4 Condensation
Section 601.4 — Condensation. 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] 602.1 Duct Material General
Section 602.1 — Duct Material General. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 602.1.1 Duct Insulation Requirements
Section 602.1.1 — Duct Insulation Requirements. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 602.1.2 Plenum Wiring
Section 602.1.2 — Plenum Wiring. This section covers electrical installation requirements. Specific conductor sizing, circuit protection, and installation methods are in the official code. Refer to the official code text for complete requirements.
[F] 602.1a HVAC Equipment Location
Section 602.1a — HVAC Equipment Location. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 602.2 Duct Materials
Section 602.2 — Duct Materials. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 602.2.1 Return Air Limitations
Section 602.2.1 — Return Air Limitations. 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] 602.3 Flexible Ducts and Connectors
Section 602.3 — Flexible Ducts and Connectors. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 602.3.1 Stud Space Plenums
Section 602.3.1 — Stud Space Plenums. 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] 602.4 Underground Ducts
Section 602.4 — Underground Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603 Duct Construction
Section 603 — Duct Construction. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.1 Duct Construction and Installation - General
Section 603.1 — Duct Construction and Installation - General. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.1.1 Duct Insulation
Section 603.1.1 — Duct Insulation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.1.2 Flexible Duct Limitations
Section 603.1.2 — Flexible Duct Limitations. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.1a Condensate Disposal
Section 603.1a — Condensate Disposal. 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] 603.2 Metallic Ducts
Section 603.2 — Metallic Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.2.1 Duct Vapor Retarder
Section 603.2.1 — Duct Vapor Retarder. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.3 Duct Stiffeners and Supports
Section 603.3 — Duct Stiffeners and Supports. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.3.1 Nonmetallic Ducts
Section 603.3.1 — Nonmetallic Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.4 Flexible Duct and Connectors
Section 603.4 — Flexible Duct and Connectors. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.4.1 Flexible Ducts
Section 603.4.1 — Flexible Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.5 Nonmetallic Ducts
Section 603.5 — Nonmetallic Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.5.1 Duct Insulation
Section 603.5.1 — Duct Insulation. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.6 Duct Joints and Seams
Section 603.6 — Duct Joints and Seams. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.6.1 Duct Sealing
Section 603.6.1 — Duct Sealing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.7 Vibration isolation connectors
Section 603.7 — Vibration isolation connectors. 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] 603.8 Joints and Seams of Ducts
Section 603.8 — Joints and Seams of Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 603.9 Duct Sealing
Section 603.9 — Duct Sealing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604 Insulation of Duct Systems
Section 604 — Insulation of Duct Systems. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604.1 Flexible Duct
Section 604.1 — Flexible Duct. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604.1.1 Fire Dampers
Section 604.1.1 — Fire Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 604.2 Duct Insulation Materials
Section 604.2 — Duct Insulation Materials. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604.2.1 Duct Leakage Testing
Section 604.2.1 — Duct Leakage Testing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604.3 Combination Fire/Smoke Dampers
Section 604.3 — Combination Fire/Smoke Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 604.3.1 Combination Fire/Smoke Dampers
Section 604.3.1 — Combination Fire/Smoke Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 604.4 Underground Ducts
Section 604.4 — Underground Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 604.5 Paper and Vinyl Ducts
Section 604.5 — Paper and Vinyl Ducts. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 605.1 Fire Dampers
Section 605.1 — Fire Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 605.1.1 Flexible Duct and Connectors
Section 605.1.1 — Flexible Duct and Connectors. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 605.2 Smoke Dampers
Section 605.2 — Smoke Dampers. 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] 605.3 Filter Access
Section 605.3 — Filter 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] 605.4 Flexible Duct Support
Section 605.4 — Flexible Duct Support. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 606.1 Fire and Smoke Dampers
Section 606.1 — Fire and Smoke Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 606.1.1 Fire and Smoke Dampers
Section 606.1.1 — Fire and Smoke Dampers. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 606.2 Smoke Dampers - Where Required
Section 606.2 — Smoke Dampers - Where Required. 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] 606.3 Duct Coverings and Linings
Section 606.3 — Duct Coverings and Linings. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 606.4 Lining Installation
Section 606.4 — Lining 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] 607.1 Ducts Penetrating Fire-Resistance-Rated Assemblies
Section 607.1 — Ducts Penetrating Fire-Resistance-Rated Assemblies. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 607.1.1 Duct Support and Hangers
Section 607.1.1 — Duct Support and Hangers. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] 607.2 Fire Damper Ratings
Section 607.2 — Fire Damper Ratings. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] 607.3 Smoke Dampers
Section 607.3 — Smoke Dampers. 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] 607.4 Access to Dampers
Section 607.4 — Access to Dampers. 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] 607.5 Damper Installation
Section 607.5 — Damper 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.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.