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...
Sep 29, 2020 | Dr. Energy |
Question: I submitted plans to a city for review, which was rejected because the R-values on the plan sheets did not match the R-values on the REScheck or COMcheck. Why are they being so nit-picky? Thermal Factors- R-values, U-factors & SHGCs – Consistency on all...
Aug 31, 2020 | Dr. Energy |
Question: Do I have to test residential ducts located outside the thermal envelope if I use the Performance or ERI Path for IECC Code Compliance? How do the Utah state amendments affect the testing requirement for ducts? I have received numerous questions regarding...
Jul 10, 2020 | Dr. Energy |
Question from an HVAC supplier: Has the State of Utah adopted 2015 IRC requiring R8 on the returns at this time? Doesn’t the code allow R-4.2 for return ducts in the attic? If R-8, when did the code change? A couple of important items to consider includes the...
