science

National Green Building Standard

National Green Building Standard is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand National Green Building Standard rather than just read about it. In short: The National Green Building Standard (NGBS) is an ANSI-approved green building certification program, specifically focused on single-family and multi-family residential buildings, remodeling projects, and land developments. In a partnership with the ASHRAE, the International Code Council (ICC), and the National Association of Home Builders (NAHB ), the NGBS was developed to provide a uniform national platform for re…

Key takeaways

National Green Building Standard belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect National Green Building Standard to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of National Green Building Standard from memory before moving on to harder problems.

Reference excerpt

The National Green Building Standard (NGBS) is an ANSI-approved green building certification program, specifically focused on single-family and multi-family residential buildings, remodeling projects, and land developments. In a partnership with the ASHRAE, the International Code Council (ICC), and the National Association of Home Builders (NAHB ), the NGBS was developed to provide a uniform national platform for recognizing and advancing green residential construction and development. To date, over 100,000 residential units have been certified green with the National Green Building Standard.

Rating System The NGBS is a point-based system, wherein a single-family or multifamily building(s) can attain certification depending on the sustainable and green practices included in design and construction, and planned for its operation and maintenance. Projects can qualify for four certification levels (Bronze, Silver, Gold, or Emerald) by earning the required number of points for each level.

ANSI-approved consensus The 2015 edition of the NGBS is the third iteration of the NGBS, building upon the previous 2012 and 2008 editions. All editions of the Standard were developed by Consensus Committees of industry and nonprofit individuals, and in partnership with the ICC and NAHB. The 2015 edition of the NGBS introduced a new partner in the development process, ASHRAE. Staff of these three organizations did not serve as members of the Consensus Committee, and aided only in the facilitation of meetings. The NGBS remains the only residential-specific green building rating system to undergo the full consensus process and receive approval from the American National Standards Institute (ANSI). ANSI approval is critical as it serves as third-party confirmation of balance, representation, openness, consensus, and due process in the development process. The Consensus Committee that developed the 2015 version of the Standard was composed of 42 individuals representing a variety of government agencies, municipalities, home building industry stakeholders, and non-profit organizations, including but not limited to:

National Multifamily Housing Council National Institute of Standards & Technology Northeast Energy Efficiency Partnerships Texas A&M University U.S. Department of Energy (DOE) U.S. Department of Housing & Urban Development (HUD) American Institute of Architects (AIA) City of Des Moines

Green practice categories Points are earned when a project complies with the numerous green building practices laid out within the Standard. These practices fall into six general categories:

lot design, preparation, and development resource efficiency energy efficiency water efficiency indoor environmental quality operation, maintenance, and building owner education

Certification levels Projects can qualify for four levels of certification by earning the required total number of points for each level:

Bronze: 231 Points Silver: 334 Points Gold: 489 Points Emerald: 611 Points The NGBS was designed so that a project team must take a multifaceted approach to green building. It requires that a project achieve a minimum number of points in each green practice category to be certified, as well as earn a minimum number of additional points from any category it chooses. This prevents project teams from obtaining all of its points by focusing on a handful of categories, and ignoring other categories due to difficulty. A building’s highest rating depends upon the lowest threshold met by any of the six categories. For example, if a project missed the threshold for Emerald in one category by a single point, it will still only achieve Gold certification even if it reached the required number of points for Emerald certification in all other categories. Furthermore, for dwelling units greater than 4,000 square feet, the number of total points required to receive certification levels increases by one point for every additional 100 square feet. This makes it more challenging for larger dwellings to receive the same certification as smaller dwellings to account for the larger environmental impact of larger dwelling spaces.

Eligible Project Types

Residential buildings The NGBS was designed specifically for residential construction, development, and renovation. Eligible building types which can earn certification through the Standard include:

single-family houses low-rise multifamily high-rise multifamily residential portions of mixed-use buildings affordable housing renovations of existing houses

Land development Within the NGBS, and separate from individual buildings and renovations, a development can receive a certification for design and preparation in accordance with green practices. Similar to buildings, lane development projects can qualify for four different rating levels:

1-Star: 95 points 2-Star: 122 points 3-Star: 149 points 4-Star: 175 points For land development projects, points are not divided among separate categories, but are a total collection of varying practices, such as stormwater management, natural resource conservation, and planning.

Certification Process Conformance with the NGBS is verified through construction documents, plans, specifications, inspection reports, and other data that demonstrates conformance with the points being pursued. All NGBS project teams must include a NGBS Green Verifier, who serves as an independent, in-field representatives of the NGBS Green certification system. Verifiers work with project teams to perform the rough and final construction inspections described below. To achieve certification, these inspection reports, along with relevant information regarding pursued practices, are provided to Home Innovation Labs for technical review and verification. Every project is subject to two independent and mandatory, third-party verification inspections. The accredited Verifier is responsible for the visual inspection of every green building practice in the building. The verifier must perform a rough inspection before the drywall is installed in order to observe the wall cavities in every apartment, and a final inspection of every apartment once the project is complete. The required verification imbues a high level of rigor, continuity, and quality assurance to the system and to the projects that are certified.

Designations

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with National Green Building Standard

Start with the simplest possible case. Write down what National Green Building Standard claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to National Green Building Standard before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about National Green Building Standard ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of National Green Building Standard

In research: National Green Building Standard appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses National Green Building Standard in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: National Green Building Standard is common in secondary-school and first-year university syllabi. It links to neighbouring topics Building, so understanding it makes those chapters shorter.
In everyday life: Look for National Green Building Standard outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study National Green Building Standard in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what National Green Building Standard means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain National Green Building Standard out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is National Green Building Standard in simple terms?

Why does National Green Building Standard matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study National Green Building Standard?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on National Green Building Standard.