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Interview with Craig Drumheller: Insights to Buried Ducts in Attics

The 2018 edition of the International Energy Conservation Code (IECC) has been published, and it includes new provisions regarding HVAC ducts buried in vented attic insulation. The code changes, proposed by Craig Drumheller from the National Association of Home Builders (NAHB), allow ducts to be buried in attic insulation, and when using the performance path, provides credit for the improved duct efficiency.     We sat down with Craig to dive into some of the details of his proposed code change, and how it can influence duct system design and energy savings. Can you give us a brief explanation of your…


Intro to Commercial Building HVAC Systems and Energy Code Requirements

Overview of common commercial building heating, ventilating, and air conditioning (HVAC) systems as they relate to energy code requirements. Learn about the most common HVAC systems and equipment, along with energy-related components and controls. Several important energy code requirements will be reviewed, including what to look for in the field or on plans. Learning Objectives: Identify common HVAC system types Identify important HVAC controls, including economizers Name high impact energy code items related to HVAC equipment and controls List the steps in verifying fan power calculations Click here to watch this presentation. https://news.jm.com/blog/hvac-insulation/intro-commercial-building-hvac-systems-and-energy-code-requirements


Johns Manville Releases the First Flexible R-12 Fiberglass Duct Liner

Johns Manville is proud to announce its release of the first ever flexible fiberglass duct liner with an R-12 thermal resistivity rating. This innovative insulation is designed specifically to meet the new code requirements set forth by the IECC in 2015 that mandate the use of R-12 insulation on ducts in unconditioned spaces in climate zones 5-8. Click here to read more about this new R-12 duct liner.  https://news.jm.com/blog/hvac-insulation/johns-manville-releases-first-flexible-r-12-fiberglass-duct-liner


Long-Term Corrosion Testing: What Happened Next?

In 2017 and 2018, Johns Manville built upon the long-term, third-party corrosion testing we started in 2016, and the new results are in. The research sought to explore how corrosion under insulation (CUI) impacts a completely insulated pipe system (pipe, insulation, and jacketing) under conditions designed to accelerate corrosion. The test program started in 2016 with two hydrophobic high-temperature blanket insulations (InsulThin™ HT microporous blanket and a silica aerogel blanket) and in 2017 was expanded to include testing on calcium silicate and expanded perlite insulation. While traditional research and testing isolate variables to strictly explore the interaction of insulation on…


Corrosion Testing: Methods, Results & Interpretation

It is often necessary to predict the performance of a specific material in a particular environment to determine the inherent corrosivity of the system. Such tests are often substantially different from those used for corrosion inhibitor qualification, particularly in the case of the corrosion testing of corrosion resistant alloys. Predicting corrosivity is especially important when designing subsea equipment, most of which is extremely challenging to repair or replace once it is installed. Corrosion testing is a widely used method of evaluating a material’s ability to withstand specific environmental conditions. Corrosion in field conditions can be extremely slow, thus accelerated test…


The Viridian Reserve at Hickory: A Stunning Virginia View

The Viridian Reserve at Hickory: A Stunning Virginia View | 2018-06-05 | Walls & Ceilings Online This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more. This Website Uses CookiesBy closing this message or continuing to use our site, you agree to our cookie policy. Learn More This website…

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