Tag Archives: ASHRAE

The Proper Ventilation Rate for an Indoor Environment

Green Building

The Proper Ventilation Rate for an Indoor Environment

Originally published on November 9, 2018 by BNP Media through the Building Enclosure Blog. Ventilation rates in our buildings can be a complicated subject and there is no shortage on ways to assess how air is brought into an indoor environment. Yet, a basic question that commonly emerges is simply: How much ventilation should I provide in a building? ANSI/ASHRAE Standard 62.1 When it comes to defining minimum ventilation rates in buildings (except for low-rise residential), the premiere reference is ANSI/ASHRAE….

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Clarifying Energy Simulation Aided Design: A Look at ASHRAE Standard 209

Green Building

Clarifying Energy Simulation Aided Design: A Look at ASHRAE Standard 209

Originally published on September 5, 2018 by BNP Media through the Building Enclosure Blog. ANSI/ASHRAE Standard 209-2018, Energy Simulation Aided Design for Buildings Except Low-Rise Residential Buildings is the product of a half-decade of inertia within the building design and construction community toward leveraging energy modeling a design tool through a project. Standard 209 outlines the minimum requirements for providing energy design assistance using building energy simulation and analysis. To this end, the standard defines a range of minimum criteria from energy modeling requirements,….

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How to Make Building Energy Models More Accurate

Green Building

How to Make Building Energy Models More Accurate

Originally published on August 13, 2018 by BNP Media through the Building Enclosure Blog.   I’m asked regularly about the discrepancies between modeled and measured building performance. At first blush, one might suspect that the building energy model (BEM) itself contains bad information. That notion could very well be correct! BEM inputs require a certain level of synthesis, interpretation, and assumption. But there are many other reasons why the BEM results may vary significantly from measured performance outcomes on a completed project. In basic terms: Actual weather in….

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The Psychrometric Chart Explained

Green Building

The Psychrometric Chart Explained

Originally published on June 13, 2018 by BNP Media through the Building Enclosure Blog. It is one of the intimidating charts for any building design professional: the psychrometric chart. At first blush, the “psych chart” looks very complicated. There are layers of axes and curved reference lines. However, a closer examination will reveal that – at its essence – the chart is visually conveying the answers to two related questions: How much sensible (dry-bulb) heat is in the air? (See….

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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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Energy Use Intensity (EUI) in Simple Terms

Green Building

Energy Use Intensity (EUI) in Simple Terms

Originally published on August 17, 2017 by BNP Media through the Building Enclosure Blog.   Energy use intensity – or EUI. It has been called “the miles per gallon rating of the building industry,” but many design and construction professionals are not entirely sure how EUI is defined and what its utility is with regard to project. Below is a primer to help get anyone started.   Energy Use Intensity (EUI) Energy Use Intensity (EUI) can be defined as the….

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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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BECx is Coming to a Project Near You

Green Building

BECx is Coming to a Project Near You

Originally published on January 11, 2017 by BNP Media through the Building Enclosure Blog. . In recent years, a growing demand for high-performance building envelope solutions has been evidenced by the increased attention paid to this topic throughout the building design and construction industry. Building Envelope Council (BEC) initiative Seeing this emerging priority, in 2004 the National Institute of Building Sciences (NIBS) Building Enclosure Technology and Environmental Council (BETEC) and the American Institute of Architects (AIA) signed an agreement to….

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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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Standard Effective Temperature (SET) and Thermal Comfort

Green Building

Standard Effective Temperature (SET) and Thermal Comfort

Originally published on January 18, 2016 by BNP Media through the Architectural Roofing & Waterproofing Blog. Recently, the U.S. Green Building Council adopted three new pilot credits on resilient design for use by LEED project teams for innovation credit. One pilot credit in particular, Passive Survivability and Functionality During Emergencies, endeavors to ensure that buildings will maintain reasonable (i.e., “survivable”) functionality, including access to potable water, in the event of an extended power outage or loss of heating fuel. Power outages….

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