909.4 Ducts prohibited.
MC § 909.4
Ducts shall not be attached to wall furnaces. Casing extension boots shall not be installed unless listed as part of the appliance.
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What is NYC MC § 909.4?
Quick Answer
This section prohibits the attachment of ducts to wall furnaces and restricts the installation of casing extension boots to those listed as part of the appliance. Applies to building owners and operators managing heating systems.
General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.
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