Tag Archives: Energy Codes

Clarifying Slab-on-Grade Insulation in ASHRAE Standard 90.1

Green Building

Clarifying Slab-on-Grade Insulation in ASHRAE Standard 90.1

Originally published on April 8, 2019 by BNP Media through the Building Enclosure Blog. Slab-on-grade insulation. It seems like it should not be so complicated. Yet, slab-on-grade insulation can be arranged in a number of configurations, each with pros and cons. One arrangement may be more conducive to maintaining a continuous thermal barrier from a wall down through its foundation but it allows unsightly exposure along the building perimeter. Another configuration may better conceal the insulation yet it allows an….

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Gauging the Impact of Exterior Shading using the Projection Factor

Green Building

Gauging the Impact of Exterior Shading using the Projection Factor

Originally published on February 15, 2019 by BNP Media through the Building Enclosure Blog. The solar heat gain coefficient (SHGC) is a ratio that defines the amount of solar energy that reaches a glazing assembly (including both the glass and frame) with the amount that gets through to the inside. It represents the ability of a glazing assembly to resist heat gain from direct solar radiation. A high SHGC indicates poor resistance. That means most of the solar radiation arriving to the window or….

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Why the 2018 IgCC is Critical to the Future of Green Building

Green Building

Why the 2018 IgCC is Critical to the Future of Green Building

Originally published on January 23, 2019 by BNP Media through the Building Enclosure Blog. It has been nearly half a decade since the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), the American Institute of Architects (AIA), the International Code Council (ICC); the Illuminating Engineering Society (IES); and the U.S. Green Building Council (USGBC) signed a Moratorium of Understanding to better align green building goals through ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1, the International Green Construction Code (IgCC), and the LEED certification system. For years, these groups had been working on their owner….

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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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Here is Your Elevator Pitch Against “LEED Equivalent” Projects

Green Building

Here is Your Elevator Pitch Against “LEED Equivalent” Projects

Originally published on December 6, 2016 by BNP Media through the Building Enclosure Blog. Have you ever been asked to design or construct a project “to LEED’s standard” without actually submitting for certification? This can initially sound like an attractive idea to a client. After all, as long as the owner knows the project is aligned with LEED, why pay the funds to get a plaque on the wall?   Lack of Accountability with LEED Equivalent The problem is, an….

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The Difference Between Permeance and Permeability

Green Building

The Difference Between Permeance and Permeability

Originally published on April 18, 2016 by BNP Media through the Architectural Roofing & Waterproofing Blog. All information presented in imperial (I-P) units. Water vapor transmission is a rather confusing issue. The difference in vapor pressure between two sides of a building envelope assembly is the driving force behind vapor transmission. (Although by comparison, gaps in the envelope account for vastly greater amounts moisture migration due to vapor-laden air infiltration.) Vapor = Latent Heat; Air Temperature = Sensible Heat The….

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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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Examining the Jevons Paradox through Residential Energy Consumption

Green Building

Examining the Jevons Paradox through Residential Energy Consumption

Originally published on August 13, 2015 by BNP Media through the Walls & Ceilings Blog. Is there any such thing as a ‘perfect’ energy code? I recently posed this question to a colleague of mine – a gentleman with whom I have served alongside in multiple state code review committees over the years. He poignantly offered, “While new energy codes may improve the energy efficiency of a building, it does not follow axiomatically that the building will use less energy.”….

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