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ASHRAE Standard 62.1 User\'s Manual--Based on ANSI/ASHRAE Standard 62.1-2019, Ventilation for Acceptable Indoor Air Quality, 2019
- Standard 62.1 User's Manual [Go to Page]
- 62MZCalc Spreadsheets
- Contents
- Figures
- Tables
- Examples
- Preface [Go to Page]
- General Information
- Audience
- Addenda
- Official Interpretations
- Standard 62.1 Organization
- Organization and Use of the User’s Manual
- Data and Analysis Tools
- Acknowledgments
- 1 Purpose [Go to Page]
- Overview (§1.1)
- Regulatory Application (§1.2)
- Existing Buildings (§1.3)
- 2 Scope [Go to Page]
- Spaces Covered (§2.1)
- Scope of Requirements (§2.2)
- Issues Covered (§2.3)
- Laboratories, Healthcare, and Smoking Spaces (§2.4)
- 3 Definitions, Abbreviations, and Acronyms [Go to Page]
- Definitions
- Abbreviations and Acronyms
- 4 Outdoor Air Quality [Go to Page]
- Overview
- Regional Air Quality (§4.1)
- Local Air Quality (§4.2)
- Documentation (§4.3) [Go to Page]
- Regional Air Quality Compliance
- Local Air Quality Survey Information
- Summary
- 5 Systems and Equipment [Go to Page]
- Overview
- Ventilation Air Distribution (§5.1) [Go to Page]
- Designing for Air Balancing (§5.1.1) [Go to Page]
- Designing for Varying Loads and Operating Conditions (§5.1.1.1)
- Plenum Systems (§5.1.2)
- Documentation (§5.1.3)
- Exhaust Duct Location (§5.2)
- Ventilation System Controls (§5.3) [Go to Page]
- Constant-Volume, Single-Zone Systems
- Variable-Air-Volume System
- Airstream Surfaces (§5.4) [Go to Page]
- Resistance to Mold Growth (§5.4.1)
- Resistance to Erosion (§5.4.2)
- Outdoor Air Intakes (§5.5) [Go to Page]
- Location (§5.5.1)
- Rain Entrainment and Intrusion (§5.5.2 and §5.5.3)
- Snow Entrainment (§5.5.4)
- Bird Screens (§5.5.5)
- Local Capture of Contaminants (§5.6)
- Ozone Generating Devices (§5.7)
- Combustion Air (§5.8)
- Particulate Matter Removal (§5.9)
- Maximum Indoor Air Dew Point in Mechanically Cooled Buildings (§5.10) [Go to Page]
- Building Exfiltration (§5.11) [Go to Page]
- Exception to the Exfiltration Requirement
- Drain Pans (§5.12)
- Drain-Pan Slope (§5.12.1)
- Drain Outlet (§5.12.2)
- Drain Seal (§5.12.3)
- Pan Size (§5.12.4)
- Finned-Tube Coils and Heat Exchangers (§5.13) [Go to Page]
- Drain Pans (§5.13.1)
- Finned-Tube-Coil Selection for Cleaning (§5.13.2)
- Humidifiers and Water Spray Systems (§5.14) [Go to Page]
- Water Quality (§5.14.1)
- Obstructions (§5.14.2)
- Access for Inspection, Cleaning, and Maintenance (§5.15) [Go to Page]
- Equipment Clearance (§5.15.1)
- Ventilation Equipment Access (§5.15.2)
- Air Distribution System (§5.15.3)
- Building Envelope and Interior Surfaces (§5.16) [Go to Page]
- Building Envelope (§5.16.1) [Go to Page]
- Weather Barrier
- Vapor Retarder
- Caulking and Sealing
- Soil Gases
- Condensation on Interior Surfaces (§5.16.2)
- Buildings with Attached Parking Garages (§5.17)
- Air Classification and Recirculation (§5.18) [Go to Page]
- Classification (§5.18.1)
- Redesignation (§5.18.2) [Go to Page]
- Air Cleaning (§5.18.2.1)
- Transfer (§5.18.2.2)
- Recirculation Limitations (§5.18.3)
- Documentation (§5.18.4)
- ETS Areas and ETS-Free Areas (§5.19) [Go to Page]
- Classification (§5.19.1) [Go to Page]
- Engineering Analysis
- Pressure Differential Measurement
- Airflow Measurement
- Pressure Exception for Dwelling Units and Adjacent Properties
- Pressure Exception for Hazardous Materials
- Physical Separation (§5.19.3)
- Transfer Air (§5.19.4)
- Recirculation Prohibition (§5.19.5)
- Exhaust Systems (§5.19.6)
- Signage (§5.19.7)
- Reclassification (§5.19.8)
- 6 Procedures [Go to Page]
- General (§6.1) [Go to Page]
- Outdoor Air Treatment (§6.1.4) [Go to Page]
- Particulate Matter (§6.1.4.1 and §6.1.4.2)
- Ozone (§6.1.4.3)
- Other Outdoor Contaminants (§6.1.4.4)
- Ventilation Rate Procedure (§6.2) [Go to Page]
- Rationale for Ventilation Rate Procedure
- Two Component Approach and Additivity
- Determining Component Ventilation Rates
- Ventilation Efficiency
- VRP Summary
- Zone Calculations (§6.2.1) [Go to Page]
- Determine Occupant and Building Rate Requirements (Rp and Ra) (§6.2.1.1)
- Additional Requirements and Exceptions (§6.2.1.1.2 through §6.2.1.1.6)
- Estimate the Number of Occupants in the Zone (Pz) (§6.2.1.1.7)
- Calculate the Net Occupiable Floor Area (Az)
- Calculate the Outdoor Air Required in the Breathing Zone (Vbz)
- Determine the Zone Air Distribution Effectiveness (Ez) (§6.2.1.2)
- Calculate the Minimum Zone Outdoor Air Rate Required at the Supply Air Outlets (Voz) (§6.2.1.3)
- System Calculations
- Single-Zone Systems (§6.2.2)
- 100% Outdoor Air Systems (§6.2.3)
- Multiple-Zone Recirculating Systems (§6.2.4) [Go to Page]
- Determine Uncorrected Outdoor Airflow (Vou) (§6.2.4.1)
- Determine System Ventilation Efficiency (Ev) (§6.2.4.2)
- Calculate System Outdoor Air Intake (Vot) (§6.2.4.4)
- Designing for Varying Operating Conditions (§6.2.5) [Go to Page]
- Variable Load Conditions (§6.2.5.1)
- Short-Term Conditions (§6.2.5.2)
- Dynamic Reset (§6.2.6) [Go to Page]
- Demand Control Ventilation (DCV) (§6.2.6.1)
- Ventilation Efficiency (§6.2.6.2)
- Outdoor Air Fraction (§6.2.6.3)
- Indoor Air Quality (IAQ) Procedure (§6.3) [Go to Page]
- Compliance Requirements
- Contaminant Sources (§6.3.1)
- Contaminant Concentration (§6.3.2)
- Perceived Indoor Air Quality (§6.3.3)
- Design Approach (§6.3.4)
- Combined IAQ Procedure and Ventilation Rate Procedure (§6.3.5)
- Documentation (§6.3.6)
- Natural Ventilation Procedure (§6.4) [Go to Page]
- Prescriptive Compliance Path (§6.4.1)
- Engineered System Compliance Path (§6.4.2)
- Exhaust Ventilation (§6.5) [Go to Page]
- Prescriptive Compliance Path (§6.5.1)
- Performance Compliance Path (§6.5.2)
- Design Documentation Procedures (§6.6)
- 7 Construction and System Start-Up [Go to Page]
- General
- Construction Phase (§7.1) [Go to Page]
- Filters (§7.1.2)
- Protection of Materials (§7.1.3)
- Protection of Occupied Areas (§7.1.4)
- Air Duct System Construction (§7.1.5)
- System Start-Up (§7.2) [Go to Page]
- Application (§7.2.1) [Go to Page]
- New Air Handler
- Limited Alterations
- Air Balancing (§7.2.2)
- Testing of Drain Pans (§7.2.3)
- Cleanliness (§7.2.4)
- Testing of Outdoor Air Dampers (§7.2.5)
- System Documentation (§7.2.6)
- 8 Operations and Maintenance [Go to Page]
- General (§8.1) [Go to Page]
- Application (§8.1.1)
- Building Alterations or Change of Use (§8.1.2)
- Operations and Maintenance Manual (§8.2)
- Ventilation System Operation (§8.3)
- Ventilation System Maintenance (§8.4) [Go to Page]
- Water Intrusion (Table 8-1, item a)
- Appendix A Dynamic Ventilation Reset Control [Go to Page]
- Overview
- Demand Control Ventilation (DCV) [Go to Page]
- Fundamentals of CO2-Based DCV
- Steady-State Assumption
- Control of Single-Zone Systems with Airflow Measurement [Go to Page]
- Breathing Zone Parameters (Rp, Pz, Ra, Az)
- Zone Air Distribution Effectiveness (Ez)
- Activity Level
- Indoor Concentration
- Outdoor CO2 Concentration
- Single-Zone DCV Control Sequence
- Control of Constant-Volume Systems without Airflow Measurement
- Control of Multiple-Zone Systems [Go to Page]
- CO2-based Dynamic Reset (CO2-based DR) Control Sequence
- Outdoor Air Fraction/Ventilation Efficiency-Based Dynamic Reset [Go to Page]
- Zone Controls
- Air-Handler Controls [Go to Page]