Manual S Residential Equipment Selection

Manual SManual S® - Residential Equipment Selection (2nd Edition) [ANSI/ACCA 3 Manual S - 2014]

The Second Edition of Manual S shows you how to select and size heating and cooling equipment to meet loads for a particular home based on local climate and home construction specifics. Contractors in Miami, Phoenix, and Seattle - all extremely different climates - would never use the same equipment and expect the same results. Manual S provides sizing requirements for 11 types of cooling and heating equipment, as well as in-depth explanations and examples of how to use the manufacturer's performance data.

Manual S consists of three normative sections, thirteen informative sections, and twenty two appendices across six parts.

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Normative Sections

  • Section N1 - Definitions and General Requirements
    This section defines terminology used throughout Manual S.
  • Section N2 - Equipment Size Limits
    This section outlines required sizing limits for various equipment throughout Manual S.
  • Section N3 - OEM Verification Path
    This section is for when comprehensive data is not available or incomplete. You may use alternative OEM information, provided by the system designer.

Informative Sections

Part 1 - Informative Material Pertaining to Basic Issues and Concepts

  • Section 1 - Equipment Size Issues and Limits
  • Section 2 - Cooling-Only and Heat Pump Equipment Selection
  • Section 3 - Furnace and Water Boiler Selection
  • Section 4 - Humidity Control and Evaporative Cooling Equipment 

Part 2 - Informative Material Pertaining to Central Ducted System Examples and Hydronic Heating Examples

  • Section 5 - Central Duct Air-Air Cooling Examples
  • Section 6 - Central Ducted Air-Air Heat Pump Heating Examples
  • Section 7 - Central Ducted Furnace Examples
  • Section 8 - Dual Fuel Heating Procedures and Examples
  • Section 9 - Central Ducted Water-Air Heat Pump Examples
  • Section 10 - Hydronic Heating Equipment Examples 

Part 3 - Informative Material Pertaining to Ductless Air-Air Equipment

  • Section 11 - Ductless Single-Split Equipment
  • Section 12 - Ductless Multi-Split Systems
  • Section 13 - Single-Package Equipment 

Part 4 - Informative Material Pertaining to Implementation

  • Appendix 1 - Basic Concepts for Air Systems Equipment
  • Appendix 2 - Entering Air Calculations
  • Appendix 3 - Searching OEM Data for Candidate Equipment
  • Appendix 4 - Requirements for Expanded Performance Data 
  • Appendix 5 - Altitude Effects  

Part 5 - Informative Related Information

  • Appendix 6 - Energy and Op-Cost Calculations
  • Appendix 7 - Moisture and Condensation Issues
  • Appendix 8 - Condensation Calculations
  • Appendix 9 - Water-Loop Issues for Water-Air Heat Pumps
  • Appendix 10 - Ductless Multi-Split Piping
  • Appendix 11 - Furnace or Water Boiler Cycling Efficiency
  • Appendix 12 - Matching Evaporators and Condensing Units
  • Appendix 13 - Performance Models for Cooling-Only and Heat Pump Equipment
  • Appendix 14 - Air-Air Heat Pump Supply Air Temperature
  • Appendix 15 - Whole-House Dehumidifier Performance

Part 6 - Informative Ancillary Pages

  • Appendix 16 - Glossary
  • Appendix 17 - Symbols, Acronyms, and Abbreviations
  • Appendix 18 - Summary of Equations
  • Appendix 19 - Supporting Detail for Equipment Sizing Examples
  • Appendix 20 - Rationale for Section N2 Sizing Limits
  • Appendix 21 - Related Resources
  • Appendix 22 - Blank Forms

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Additional Manual S Resources

ACCA Speed-Sheets

ACCA Speed-Sheets are Excel spreadsheets available for purchase that can be used in conjunction with ACCA Technical Manuals, which assist in learning important system design concepts. Speed-Sheets are not a replacement for the full Technical Manual, and are not a replacement for ACCA-approved software.

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