(a) The following definitions refer to residential ventilating fans:

1. (1) Residential ventilating fan means a ceiling or wall-mounted fan, or remotely mounted in-line fan, designed to be used in a bathroom or utility room for the purpose of moving air from inside the building to the outdoors.

2. (2) In-line ventilating fan means a fan designed to be located within the building structure and that requires ductwork on both intake and exhaust. Those in-line fans with only one intake are referred to as “single port” in-line fans, while those with multiple intake ports are referred to as “multi-port” in-line fans in this specification.

   (b) Standard requirements for residential ventilating fans.

3. (1) Efficacy requirements: Table 38: Requirements for Residential Ventilating Fans

   Airflow (cfm)	Minimum Efficacy Level (cfm/W)*
   All Residential Ventilation Fans < 90 cfm	1.4
   Bathroom and Utility Room Fans ≥ – 90 to 500 cfm (max)	2.8
   In-Line Fans	2.8

   (c) Test procedures for assuring compliance with the standards established in subdivision (b) of this section.

4. (1) Residential ventilation fans tested in accordance with Home Ventilation Institute Publication 916 HVI Airflow Test Procedure.

   1. (i) Fan efficacy (cfm/watt) is calculated using the as tested value for watts. This parameter is not included in the test report because cfm is the normalized value described in HVI Publication 920, and may also be derated by the member.