Tag Archives: ASHRAE 90.1

Tracking Energy Efficiency Improvements in ASHRAE Standard 90.1

Green Building

Tracking Energy Efficiency Improvements in ASHRAE Standard 90.1

Originally published on January 17, 2018 by BNP Media through the Building Enclosure Blog. It may be the most well-known standard in the building design and construction industry: ANSI/ASHRAE/IES Standard 90.1, Energy Standard for Buildings, Except Low-Rise Residential Buildings (or more commonly, ASHRAE Standard 90.1). It serves as the basis for many energy codes across the U.S. It is also the energy standard referenced by LEED and other green building certification systems. Every few years, Standard 90.1 is updated by….

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Effective Insulation R-Values in Steel vs. Wood Framing Types

Green Building

Effective Insulation R-Values in Steel vs. Wood Framing Types

Also published on May 29, 2017 by BNP Media through the Building Enclosure Blog. . The value of continuous insulation is a source of contention among some building design and construction professionals. Increasingly stringent energy code requirements are calling for minimal amounts of continuous insulation that some claim are prohibitively expensive, structurally complicated, or marginally impactful versus increased cavity insulation. Professionals are generally aware of the potential for thermal bridging in construction assemblies – the phenomenon by which heat conducts….

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Really Old Buildings are Exempt from the Indiana Energy Code

Green Building

Really Old Buildings are Exempt from the Indiana Energy Code

My firm handles a good amount of preservation and reuse work. Energy-efficiency is always an issue (we make sure of that). However, there is a considerable amount of confusion about how the Indiana energy code applies to historic buildings and renovation projects. Let’s clear the air. Buildings built before January 21, 1978 are exempt from the Indiana Energy Code. There is no substitute for primary source material. Keep these links handy: Indiana Administrative Code (IAC) – Also known as the….

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Defining Mass Walls through Heat Capacity

Green Building

Defining Mass Walls through Heat Capacity

Originally published on February 12, 2015 by BNP Media through the Architectural Roofing & Waterproofing Blog. There are significant differences in the prescriptive requirements of mass walls versus other above-grade walls. Using ASHRAE 90.1-2007 as example, above-grade walls for a steel-framed nonresidential building in Climate Zone 5 will need a minimum of R-13 insulation AND a continuous insulation layer of at least R-7.5. However, the building’s mass wall assemblies would only be required to exhibit a continuous layer of R-11.4….

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Every Energy Model Is Wrong – And Here Is Why They Are Indispensable

Green Building

Every Energy Model Is Wrong – And Here Is Why They Are Indispensable

LEED has taken some heat for buildings that do not perform as they were modeled, yet energy modeling is an essential tool for any high-performance building project. Originally published in the August 2014 issue of Environmental Design + Construction (EDC) magazine. Recently, LEED has come under fire for accounts of certified buildings not performing as well as their energy models predicted. Frequently mentioned amongst the antagonistic “gotcha” coverage is an out-of-context 2007 quote by the USGBC Research Committee acknowledging: “Buildings….

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2009 IECC vs 2010 IECC

Green Building

2009 IECC vs 2010 IECC

. In the State of Indiana, virtually all new construction projects involving Class 1 structures need to file with the Division of Fire and Building Safety. As part of the filing process, project teams must demonstrate that the new construction complies with the state’s energy code, the 2010 Indiana Energy Conservation Code (2010 IECC). Interestingly, the acronym for Indiana’s energy code is “IECC” – the same acronym adopted by the International Code Council for their International Energy Conservation Code. This has been a source of confusion….

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Can Washington Enforce a Federal Building Energy Code?

Green Building

Can Washington Enforce a Federal Building Energy Code?

I have recently received several questions related to a “federal building energy code” which requires States to adopt the 2010 version of ASHRAE Standard 90.1 by October 2013. I’ve also been asked if this supposed energy code relates to ARRA stimulus funding. This concept of a federal building energy code is a bit convoluted, but allow me to briefly explain some important aspects of this issue: Building regulations are a State issue. State and local governments are empowered to enact building….

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