ARLINGTON, Va. - The Air Conditioning Contractors of America (ACCA) has published Bob’s House, a step-by-step case study in the proper design of a residential HVACR system. Written in plain English, the book follows the ACCA residential design system.

The full ACCA residential design system incorporates Manual J (load calculation), Manual S (equipment selection), and Manual D (duct design). Bob’s House explains how the system comes together in the real world.

According to ACCA, this is a useful resource for building code officials, homeowners, technicians, and anyone else who wants a better understanding of the HVACR design process. It travels from the delivery of building plans to contractors until they produce documents that could be used for permit applications, homeowner proposals or a plan for HVAC technicians to follow as they install the new system.

This general guide does not teach the reader the laws of thermodynamics or how to calculate a home’s heating and cooling requirements. It also does not examine all equipment or duct system types or provide load calculation tabular data. It does, however, explain how the information from these calculations is used to properly design a home’s heating and cooling system.

The guide also includes several appendices that explore what would happen if Bob’s house were located in a different city or if his builder had used different building materials and other possible variations. Other appendices discuss different equipment types and duct challenges and provide an illustrative example of how information might be presented for a permit application.

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Publication date:06/18/2007