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If not realized or handled, VOCs can have harmful effects on the health and wellbeing of nearby residents. Vapor intrusion (VI) is the process by which chemicals, usually volatile organic compounds (VOCs), in soil or groundwater migrate to indoor air above or around a contaminated site. [1]
Bake-out, in several areas of technology and fabrication, and in building construction, refers to the process of using high heat temperature (), and possibly vacuum, to remove volatile compounds from materials and objects before placing them into situations where the slow release of the same volatile compounds would contaminate the contents of a container or vessel, spoil a vacuum, or cause ...
Indoor materials such as gypsum boards or carpet act as VOC 'sinks', by trapping VOC vapors for extended periods of time, and releasing them by outgassing. The VOCs can also undergo transformation at the surface through interaction with ozone. [42] In both cases, these delayed emissions can result in chronic and low-level exposures to VOCs. [50]
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Volatile organic compounds (VOCs) are organic compounds that have a high vapor pressure at room temperature. [1] They are common and exist in a variety of settings and products, not limited to house mold, upholstered furniture, arts and crafts supplies, dry cleaned clothing, and cleaning supplies. [2]
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The Red List and the Living Building Challenge. The Living Building Challenge includes seven performance categories, titled as petals. The red list falls under the materials petal. A building project may not contain any of the Red List chemicals or chemical groups. There is an exception for small components in complex products. [4]
During the winter, ACH may range from 0.50 to 0.41 in a tightly air-sealed house to 1.11 to 1.47 in a loosely air-sealed house. [ 12 ] ASHRAE now recommends ventilation rates dependent upon floor area, as a revision to the 62-2001 standard, in which the minimum ACH was 0.35, but no less than 15 CFM/person (7.1 L/s/person).