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// CODE SNIPPET

1104.2.3.1 Closures

California Mechanical Code 2016 > 11 Refrigeration > 1104.0 Requirements for Refrigerant and Refrigeration System Use > 1104.2 Refrigerant Concentration Limit > 1104.2.3 Ventilated Spaces > 1104.2.3.1 Closures
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Closures in the air distribution system shall be considered. Where one or more spaces of several arranged in parallel are capable of being closed off from the source of the refrigerant leak, their volume(s) shall not be used in the calculation.

Exceptions: The following closure devices shall not be considered:
  1. Smoke dampers, fire dampers, and combination smoke and fire dampers that close only in an emergency not associated with a refrigerant leak.
  2. Dampers, such as variable-air-volume (VAV) boxes, that provide limited closure where airflow is not reduced below 10 percent of its maximum with the fan running. [ASHRAE 15:7.3.2.1]
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Related Code Sections


1104.2.3.1 Refrigeration, Closures
Closures in the air distribution system shall be considered. Where one or more spaces of several arranged in parallel are capable of being closed off ...
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