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Certification Related Test Projects

LEED Certification(Leadership in Energy and Environmental Design)

●Explanation
The Green Building Assessment System, an eco-friendly building certification system, is evaluated based on the following five comprehensive parts
Sustainable site develoment
Water savings
Energy efficiency
Material selection
Indoor environmental quality
The test contents for [Environment Tabacco Smoke (ETS) Control], one of the prerequisites for obtaining LEED certification, are as follows.
Recent buildings are becoming more and more dense and deteriorated as measures to reduce energy loss, condensation, noise isolation, and building user’s discomfort. There however are also negative aspects that cause IAQ (In Door Air Quality) and Sick House Syndrome.
Therefore, recently, as interest of IAQ (indoor air quality) has increased, importance of evaluation method and airtightness performance rating for dampness and dewing of building is increasing. By evaluating the dewatering performance of the building, it can be used as a basic data for future design of anti-dewproofing of buildings by quantitatively identifying the factors that can affect various types of dewing, such as the structure of the building, the year of use and the type of window.
The method of measuring the deposition rate of a building includes a gas tracing method and a pressurization / depressurization method etc.

●Tracer gas method
As the most basic method to measure the number of indoor ventilation, after uncertainty gas such as cobalt [CO], carbon dioxide [CO2], dinitrogen monoxide [N2O] and the like which are well mixed with indoor air is arbitrarily blown into the room, it is the method of calculating the number of times of ventilation due to draft and leaking of a building by measuring the change in gas concentration with a gas meter or the like as time goes by
< Test method application standard>
KS F 2603 - Method to measure indoor ventilation
ISO 12569 - Tracer gas dilution method

●Pressurization/Depressurization method
A method of estimating the amount of air flow after adjusting the indoor / outdoor pressure difference to an arbitrary state using a fan, etc.
<Test method application standard>
ASTM E779-03 - Standard test method for determining air leakage rate by fan pressurization
ISO 9972 - Determination method
※ Among them, the fan pressurization method related to ASTM E779-03 includes the measurement of the mechanical pressurization, depressurization of the building and the result of the air current situation of the static pressure change inside and outside the room. In the relationship between the air current situation and the pressure change, the air leakage characteristic of the building envelope can be evaluated. The fan pressurization method is simple compared with the measurement of the tracer gas and it is important to characterize the airtightness performance of the building envelope. It can be used to compare comparable airtight performance of several similar buildings and to determine air leakage reduction and ventilation rates for individual retrofit measurements applied to existing buildings, combined with leakage rates, weather and leaking location information due to other configurations on the building envelope, such as the root cause of leakage.












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