24 CFR § 3280.506
[Amendment] Heat loss/heat gain
February 22, 2021
(a) * * *
Figure 1 to Paragraph (a)
(b) * * *
Table 1 to Paragraph (b)
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(c) To assure uniform heat transmission in manufactured homes, cavities in exterior walls, floors, and ceilings must be provided with thermal insulation. For insulation purposes, the fire separation wall between each single family attached manufactured home shall be considered an exterior wall (see subpart K of this part).
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