This companion guide provides detailed information on the requirements of ANSI/ASHRAE Standard 62.1-2019 and includes tables, illustrations, and examples to aid users in designing, installing, and operating systems for ventilation in buildings. Standard 62.1 User’s Manual does not reproduce the requirements of the standard but rather paraphrases and elaborates upon them. Intended to be used in conjunction with the standard, this manual provides: • Information on the intent and application of Standard 62.1 • Sample calculations and examples • Best practices for applying the principles of good indoor air quality (IAQ) and effective ventilation when designing buildings and building systems • Useful reference material • Guidance for building operations and maintenance personnel • Instructions for the user in the application of tools used for compliance with ANSI/ASHRAE Standard 62.1-2019 Also included is an exclusive link to the recently revised Web-based spreadsheets that aid in ventilation rate procedure calculations. This manual is intended for architects, engineers, manufacturers, plan examiners, field inspectors, general and specialty contractors, and operation and maintenance personnel. Standard 62.1 User’s Manual is a crucial supplement for professionals concerned with ventilation and indoor air quality. Use it alongside your copy of ANSI/ASHRAE Standard 62.1-2019.

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PDF Pages	PDF Title
1	Standard 62.1 User’s Manual
5	Contents
8	Figures Tables
9	Examples
11	Preface General Information Audience Addenda Official Interpretations
12	Standard 62.1 Organization
13	Organization and Use of the User’s Manual Data and Analysis Tools
14	Acknowledgments
15	1 Purpose Overview (§1.1) Regulatory Application (§1.2) Existing Buildings (§1.3)
17	2 Scope Spaces Covered (§2.1) Scope of Requirements (§2.2) Issues Covered (§2.3) Laboratories, Healthcare, and Smoking Spaces (§2.4)
19	3 Definitions, Abbreviations, and Acronyms Definitions Abbreviations and Acronyms
21	4 Outdoor Air Quality Overview Regional Air Quality (§4.1)
22	Local Air Quality (§4.2)
23	Documentation (§4.3) Regional Air Quality Compliance Local Air Quality Survey Information
24	Summary
25	5 Systems and Equipment Overview Ventilation Air Distribution (§5.1) Designing for Air Balancing (§5.1.1)
26	Designing for Varying Loads and Operating Conditions (§5.1.1.1) Plenum Systems (§5.1.2)
29	Documentation (§5.1.3) Exhaust Duct Location (§5.2)
31	Ventilation System Controls (§5.3) Constant-Volume, Single-Zone Systems
32	Variable-Air-Volume System
33	Airstream Surfaces (§5.4) Resistance to Mold Growth (§5.4.1) Resistance to Erosion (§5.4.2)
34	Outdoor Air Intakes (§5.5) Location (§5.5.1)
36	Rain Entrainment and Intrusion (§5.5.2 and §5.5.3)
37	Snow Entrainment (§5.5.4)
38	Bird Screens (§5.5.5) Local Capture of Contaminants (§5.6) Ozone Generating Devices (§5.7)
39	Combustion Air (§5.8) Particulate Matter Removal (§5.9) Maximum Indoor Air Dew Point in Mechanically Cooled Buildings (§5.10)
41	Building Exfiltration (§5.11) Exception to the Exfiltration Requirement
44	Drain Pans (§5.12) Drain-Pan Slope (§5.12.1)
45	Drain Outlet (§5.12.2) Drain Seal (§5.12.3) Pan Size (§5.12.4)
46	Finned-Tube Coils and Heat Exchangers (§5.13) Drain Pans (§5.13.1)
47	Finned-Tube-Coil Selection for Cleaning (§5.13.2)
48	Humidifiers and Water Spray Systems (§5.14) Water Quality (§5.14.1) Obstructions (§5.14.2)
49	Access for Inspection, Cleaning, and Maintenance (§5.15) Equipment Clearance (§5.15.1) Ventilation Equipment Access (§5.15.2)
50	Air Distribution System (§5.15.3) Building Envelope and Interior Surfaces (§5.16)
51	Building Envelope (§5.16.1) Weather Barrier Vapor Retarder Caulking and Sealing
52	Soil Gases Condensation on Interior Surfaces (§5.16.2) Buildings with Attached Parking Garages (§5.17)
53	Air Classification and Recirculation (§5.18) Classification (§5.18.1) Redesignation (§5.18.2)
54	Air Cleaning (§5.18.2.1) Transfer (§5.18.2.2)
55	Recirculation Limitations (§5.18.3) Documentation (§5.18.4)
56	ETS Areas and ETS-Free Areas (§5.19)
58	Classification (§5.19.1) Engineering Analysis Pressure Differential Measurement Airflow Measurement
59	Pressure Exception for Dwelling Units and Adjacent Properties
61	Pressure Exception for Hazardous Materials
63	Physical Separation (§5.19.3)
64	Transfer Air (§5.19.4) Recirculation Prohibition (§5.19.5)
65	Exhaust Systems (§5.19.6) Signage (§5.19.7)
66	Reclassification (§5.19.8)
67	6 Procedures General (§6.1)
68	Outdoor Air Treatment (§6.1.4) Particulate Matter (§6.1.4.1 and §6.1.4.2)
69	Ozone (§6.1.4.3)
70	Other Outdoor Contaminants (§6.1.4.4)
71	Ventilation Rate Procedure (§6.2) Rationale for Ventilation Rate Procedure Two Component Approach and Additivity
73	Determining Component Ventilation Rates
76	Ventilation Efficiency
79	VRP Summary Zone Calculations (§6.2.1)
80	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)
81	Estimate the Number of Occupants in the Zone (Pz) (§6.2.1.1.7)
82	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)
84	System Calculations Single-Zone Systems (§6.2.2) 100% Outdoor Air Systems (§6.2.3) Multiple-Zone Recirculating Systems (§6.2.4)
85	Determine Uncorrected Outdoor Airflow (Vou) (§6.2.4.1) Determine System Ventilation Efficiency (Ev) (§6.2.4.2)
88	Calculate System Outdoor Air Intake (Vot) (§6.2.4.4)
97	Designing for Varying Operating Conditions (§6.2.5) Variable Load Conditions (§6.2.5.1) Short-Term Conditions (§6.2.5.2)
102	Dynamic Reset (§6.2.6) Demand Control Ventilation (DCV) (§6.2.6.1)
103	Ventilation Efficiency (§6.2.6.2) Outdoor Air Fraction (§6.2.6.3)
104	Indoor Air Quality (IAQ) Procedure (§6.3)
105	Compliance Requirements
106	Contaminant Sources (§6.3.1)
107	Contaminant Concentration (§6.3.2) Perceived Indoor Air Quality (§6.3.3)
108	Design Approach (§6.3.4)
109	Combined IAQ Procedure and Ventilation Rate Procedure (§6.3.5) Documentation (§6.3.6)
111	Natural Ventilation Procedure (§6.4)
112	Prescriptive Compliance Path (§6.4.1)
113	Engineered System Compliance Path (§6.4.2)
117	Exhaust Ventilation (§6.5) Prescriptive Compliance Path (§6.5.1) Performance Compliance Path (§6.5.2)
119	Design Documentation Procedures (§6.6)
120	7 Construction and System Start-Up General Construction Phase (§7.1) Filters (§7.1.2) Protection of Materials (§7.1.3)
121	Protection of Occupied Areas (§7.1.4) Air Duct System Construction (§7.1.5)
123	System Start-Up (§7.2) Application (§7.2.1) New Air Handler Limited Alterations Air Balancing (§7.2.2)
124	Testing of Drain Pans (§7.2.3)
125	Cleanliness (§7.2.4) Testing of Outdoor Air Dampers (§7.2.5) System Documentation (§7.2.6)
127	8 Operations and Maintenance General (§8.1) Application (§8.1.1)
128	Building Alterations or Change of Use (§8.1.2)
129	Operations and Maintenance Manual (§8.2)
130	Ventilation System Operation (§8.3) Ventilation System Maintenance (§8.4)
131	Water Intrusion (Table 8-1, item a)
132	Appendix A Dynamic Ventilation Reset Control Overview Demand Control Ventilation (DCV) Fundamentals of CO2-Based DCV
136	Steady-State Assumption Control of Single-Zone Systems with Airflow Measurement Breathing Zone Parameters (Rp, Pz, Ra, Az) Zone Air Distribution Effectiveness (Ez) Activity Level Indoor Concentration Outdoor CO2 Concentration
137	Single-Zone DCV Control Sequence Control of Constant-Volume Systems without Airflow Measurement
139	Control of Multiple-Zone Systems CO2-based Dynamic Reset (CO2-based DR) Control Sequence
141	Outdoor Air Fraction/Ventilation Efficiency-Based Dynamic Reset Zone Controls
142	Air-Handler Controls

Published By	Publication Date	Number of Pages
ASHRAE	2019	144


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Standard Title	ASHRAE Standard 62.1 User's Manual–Based on ANSI/ASHRAE Standard 62.1-2019, Ventilation for Acceptable Indoor Air Quality
Published Code	ASHRAE
Publication Date	2019
Pages Count	144

ASHRAE UserManual 62.1 2019

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