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Protection from freezing.

Municipal Code of Chicago § 18-28-1502.4.3
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18-28-1502.4.3 Protection from freezing. System components shall be protected from damage by freezing of heat transfer liquids at the lowest ambient temperatures that will be encountered during the operation of the system.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2689291Fetched: 10/24/2026

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18-28-1502.4.3 | Corpus