cognizant authority

[ASHRAE Standard 62.1]:an agency or organization that has the expertise and jurisdiction to establish and regulate concentration limits for airborne contaminants, or an agency or organization that is recognized as authoritative and has the scope and expertise to establish guidelines, Continue reading →

collar

[EN 12792:2003, 73]:piece of metal that is added to shaped sheet metal components (e.g. tapers, transitions) to provide parallel ends to facilitate jointing with adjacent components.

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collector chamber

[AIVC, Air infiltration and ventilation glossary, 1992]:sealed box or other enclosure used to isolate a building component when conducting pressurization tests.

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