Standards and codes: Tools to guide green building

08 May 2017

The website offers green-building standards, codes, certification systems and tools to assist professionals to achieve LEED certification.
In US, Green building codes are established by law as mandatory building requirements adopted by a state or local jurisdiction. Adopted codes are often based on established standards, and “model” code language is developed by building compliance professionals with input from stakeholders. Currently, model codes are revised and updated on a continual basis an open, public forum where amendments are proposed, debated and voted upon. This is the only aspect that may impact policies. 
Green building tools support building-codes by providing means to analyse specific aspects of sustainable or “green” building, such as energy efficiency modelling, indoor air quality analysis or materials screening and evaluation. These tools can be standards themselves, and are sometimes referenced in whole green building systems, codes and certification systems. Several tools referred to by some of the leading green building approaches are:
1. Whole building life cycle assessment: The Athena Impact Estimator
2. Energy efficiency: For residential buildings, the RESNET Standard for HERS (Home Energy Rating System)
Both of these aspects may influence the sustainability and energy policies. 
Apart from that, the scope of several green building approaches available was highlighted based on building types;
1. Residential
a. Whole green building systems: American Society of Heating, Refrigeration, Air conditioning Engineers 189.1 (ASHRAE)
b. Green building codes: International Green Construction Code (IgCC)
c. Green building certification/rating systems: Leadership in Energy & Environmental Design (LEED), Green Globes, Living Building Challenge
2. Non-residential or commercial sectors
a. Whole green building systems: National green building standard (NGBS)
b. Green building certification: LEEDS HOMES