LEED: IEQ Prerequisite The Indoor Environmental Quality (EQ) category rewards decisions made by project teams about indoor air quality<br />and thermal, visual, and acoustic comfort. Green buildings with good indoor environmental quality protect the<br />health and comfort of building occupants. High-quality indoor environments also enhance productivity, decrease<br />absenteeism, improve the Read more…
Human body has the ability to adapt to environmental conditions and become accustomed to them over time. People accustomed to the variability of environmental parameters in non-air-conditioned buildings can live and work through a larger temperature range without experiencing thermal discomfort. This logic informs the adaptive thermal comfort model for Read more…
HVAC System: The equipment, distribution systems, and terminals that provide, either collectively or individually, the processes of heating, ventilating, or air conditioning to a building or portion of a building. Following are Space conditioning types as per Energy Conservation Building Code (ECBC): Chillers Split/Packaged Air conditioners Variable refrigerant flow Air Read more…
Ventilation The process of supplying air to or removing air from a space for the purpose of controlling air contaminant levels, humidity, or temperature within the space. Following are types of ventilated spaces as per ECBC: 1. Natural Ventilation Ventilation provided by thermal, wind, or diffusion effects through doors, windows, Read more…
Urban Heat Island Effect An urban heat island occurs when a city experiences much warmer temperatures than in nearby rural areas. The difference in temperature between urban and less-developed rural areas has to do with how well the surfaces in each environment absorb and hold heat. Design strategies to reduce Read more…
For fenestration with a permanent external projection, including but not limited to overhangs, side fins, box frame, verandah, balcony, and fixed canopies that provide permanent shading to the fenestration, the equivalent SHGC for the proposed shaded fenestration may be determined as less than or equal to the SHGC requirements of Read more…
For all climatic zones, vertical fenestration compliance requirements for all three incremental energy efficiency levels, i.e. ECBC, ECBC+, and SuperECBC, shall comply with the following: (a) Maximum allowable Window Wall Ratio (WWR) is 40% (applicable to buildings showing compliance using the Prescriptive Method, including Building Envelope Trade-off Method) (b) Minimum Read more…
U-value Thermal transmittance (U value) is the heat transmission in unit time through unit area of a material or construction and the boundary air films, induced by unit temperature difference between the environments on either side.Unit of U value is W/m2.K. U value for the wall/roof/glazing indicates its ability to Read more…
What is Daylighting? Daylighting is the controlled admission of natural light, direct sunlight, and diffused-skylight into a building to reduce electric lighting and saving energy. By providing a direct link to the dynamic and perpetually evolving patterns of outdoor illumination, daylighting helps create a visually stimulating and productive environment for Read more…
SHGC and Shading coefficient are both terms used for fenestration of a building. They are used to describe properties of a glass while determine solar heat gain through a window. Solar Heat Gain Coefficient (SHGC) The Solar Heat Gain Coefficient (SHGC) is the percent of solar energy incident on the Read more…