Jun 24, 2021 | Dr. Energy |
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...
Jun 23, 2021 | Dr. Energy |
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,...
Feb 3, 2021 | Dr. Energy |
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...
Jan 14, 2021 | Dr. Energy |
Question: For many years hot water piping has been typically installed to restroom fixtures as represented in Option 1 below. An Inspector has told us the IECC requires piping configured as shown in Option 2. Is this a mandatory requirement, and if so why? Answer:...
Jan 14, 2021 | Dr. Energy |
Question: We have a project with 2-unit and 3-unit townhouses. Is a separate REScheck required for each unit and how do we treat the common walls between units? Answer: First a review of a definition from the IRC (International Residential Code) is useful in the...
Oct 29, 2020 | Dr. Energy |
The question: is it acceptable to simply insulate under and around the ducts with the building insulation? Referring to the IECC: R403.3.1 Insulation (Prescriptive). Supply and return ducts in attics shall be insulated to a minimum of R-8 where 3 inches (76 mm) in...
