Part 5: Infiltration and Ventilation Air - Impact on Load Calculation This discussion is the fifth in a series on the design a residential HVAC system in accordance with ACCA Manuals J, D, and S, as requirement by the ICC mechanical and energy codes.  The focus is the...

Part 4: Fenestration Windows, Doors, and Skylights – Impact on Heat Loss and Heat Gain The IECC (International Energy Conservation Code) include this definition: FENESTRATION. Products classified as either vertical fenestration or skylights. Skylight. Glass or other...

Part 3: Thermal Factors R-values, U-factors & SHGCs – Consistency on all Construction Documents This discussion is the third in a series on the code requirements for the designing residential HVAC system in accordance with ACCA Manuals J, D, and S.  The focus here...

Part 2: Manual J Design Conditions In Part one, we introduced a series of discussions on load calculation, duct design, and equipment selection.  In this 2nd Part, we will discuss design conditions, opening with a review of several words and terms, as identified in...

Part 1: Introduction This is first of several discussions in a series on factors impacting residential HVAC design. Manuals J, D and S, the ACCA/ANSI Standards for Residential HVAC Design, are recognized by virtually all current Energy, Mechanical and Building Codes,...

Author: Brent Ursenbach This code discussion is based on the 2015 International Residential Code (IRC) as currently adopted, including Utah Amendments where applicable. State Amendments to sections from IRC code quoted are identified with red text. Italics indicate...