This abridged version of Manual J, 8th Edition, provides complete instructions for estimating heat loss and heat gain for residential structures. This abridged edition of Manual J is sufficient for learning the Manual J procedures and for undertaking hand calculations on a varied number of home applications.

Included in this abridged edition of Manual J (MJ8AE):

• Section 1. Provides a general introduction to the types of heating and cooling loads.
• Section 2. Focuses on MJ8AE protocols for producing accurate load calculations.
• Section 3. Addresses issues/concepts related to design conditions, load evaluation, and building construction.
• Section 4. Provides numerous examples for calculating component (i.e., wall, windows, ceilings, etc.) heat loss.
• Section 5. Provides numerous examples for calculating heat gain.
• Section 6. Provides guidance for using Form J1AE and J1AE worksheets.
• Sections 7 through 9. Provide detailed examples that demonstrate the procedure presented in the preceding sections.
• Section 10. Lists the subsequent steps in the design procedure (after the loads are determined).
• Tables. Provide all building performance information needed for MJ8AE heat loss and heat gain estimates.
• Appendices. Provide information needed to use and understand Manual J procedures.

Note: New homes, homes that have had significant performance upgrades/modifications, or homes that have non-standard design elements (i.e., NFRC labeled glass, large glass areas, multi-zone systems, sunrooms, atriums, excessive internal loads, heat recovery systems, etc.) should use the comprehensive procedures of the unabridged version of Manual J, 8th Edition.

Contents
Section 1. Types of Heating and Cooling Loads; Section 2. Making an Accurate Load Estimate; Section 3. Important Issues and Concepts; Section 4. Component Heat Loss (Heating Calculations); Section 5. Component Heat Gain (Cooling) Calculations; Section 6. Instructions for Using Form J1AE and the J1AE Worksheets; Section 7. Vatilo Residence (Block Load); Section 8. Victor Residence (Block Load); Section 9. Long Residence (Block and Room Loads); Section 10. What to Do Next; Tables; Appendix 1. Notes for Instructors; Appendix 2. MJ8AE Capabilities and Sensitivities; Appendix 3. Adequate Exposure Diversity and System Compatibility; Appendix 4. Physical Principles and Mathematics; Appendix 5. Survey; Appendix 6. Troubleshooting System Design Problems; Appendix 7. Summary of Equations Used by MJ8AE; Appendix 8. Glossary; Appendix 9. Symbols and Abbreviations; Appendix 10. Forms and Worksheets; Index.