GroundRules
10 CFR 460.204: Mechanical ventilation fan efficacy.
Where this section sits in the code
- Title 10—Energy
- CHAPTER II—DEPARTMENT OF ENERGY
- SUBCHAPTER D—ENERGY CONSERVATION
- PART 460—ENERGY CONSERVATION STANDARDS FOR MANUFACTURED HOMES
- Subpart C—HVAC, Service Hot Water, and Equipment Sizing
(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 ventilator Any 1.2
In-line supply or exhaust fans Any 3.8
Other exhaust fan <90 2.8
Other exhaust fan ≥90 3.5
(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.
Collected 2026-08-27T02:24:09Z. Source file · JSON