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Unfired vessel insulation.

Municipal Code of Chicago § 18-29-505.1
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18-29-505.1 Unfired vessel insulation. Unfired hot water storage tanks shall be insulated to R-12.5 (h × ft 2 × °F) / Btu (R-2.2 m 2 × K/W). (Amend Coun. J. 10-14-21, p. 37722, Art. V, § 5)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2691343Fetched: 10/24/2026

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18-29-505.1 | Corpus