10 CFR 460.201
§ 460.201 Duct system.
United States · 10 CFR — Energy · Status: effective
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- Citation
- 10 CFR 460.201, § 460.201 Duct system, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/39841
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Full text
Each manufactured home equipped with a duct system, which may include air handlers and filter boxes, must be sealed to limit total air leakage to less than or equal to four (4) cubic feet per minute per 100 square feet of conditioned floor area at a pressure differential of 0.1 inch w.g. (25 Pascals) across the system. Building framing cavities must not be used as ducts or plenums when directly connected to mechanical systems. The duct total air leakage requirements are adapted from section R403 of the 2021 IECC.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.