§ 460.204. Mechanical ventilation fan efficacy.
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/us/cfr/t10/s§ 460.204·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Whole-house mechanical ventilation system fans must meet the minimum efficacy requirements set forth in table 1 to 460.204(a), except as provided in paragraph
(b)of this section. The mechanical ventilation fan efficacy requirements are adapted from section R403 of the 2021 IECC. Table 1 to § 460.204(a)—Mechanical Ventilation System Fan Efficacy Fan type description Airflow rate minimum
(cfm)Minimum efficacy (cfm/watt) Heat recovery ventilator or energy recovery ventilatorAny1.2 In-line supply or exhaust fansAny3.8 Other exhaust fan<902.8 Other exhaust fan≥903.5
(b)Mechanical ventilation fans that are integral to heating, ventilating, and air conditioning equipment, including furnace fans as defined in § 430.2 of this subchapter, are not subject to the efficiency requirements in paragraph
(a)of this section.
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§ 460.204
Mechanical ventilation fan efficacy.
Fed. Reg.×1
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