TheLEED for Homes Rating System (v4)addresses kitchen ventilation requirements in theIndoor Environmental Quality (EQ) Prerequisite: Ventilation, which referencesASHRAE Standard 62.2-2010for minimum airflow rates in residential buildings, including multi-family units.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Prerequisite: Ventilation
For intermittent local exhaust in kitchens, ASHRAE Standard 62.2-2010 requires a minimum airflow rate of 100 cfm (47 lps) for each kitchen to effectively remove cooking-related pollutants and moisture, regardless of the number of bedrooms.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Prerequisite: Ventilation, p. 142.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Prerequisite: Ventilation
Intermittent local exhaust in kitchens must provide at least 100 cfm (47 lps) per ASHRAE 62.2-2010 to ensure adequate ventilation in multi-family units, including two-bedroom units.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer is100 cfm (47 lps)(Option A), as this is the minimum airflow requirement for intermittent kitchen exhaust per ASHRAE 62.2-2010.
Why not the other options?
B. 200 cfm (94 lps): This exceeds the minimum requirement for intermittent kitchen exhaust.
C. 1 cfm per ft² (5.08 lps per m²): Kitchen exhaust is not based on floor area but on a fixed rate (100 cfm).
[Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Prerequisite: Ventilation, p. 142., TheLEED AP Homes Candidate Handbookemphasizes EQ prerequisites, including ventilation requirements, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of ASHRAE 62.2-2010., References:, LEED Reference Guide for Homes Design and Construction, v4, USGBC, Indoor Environmental Quality Prerequisite: Ventilation, p. 142., LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.usgbc.org/credits)., LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4)., USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org/resources/leed-homes-design-and-construction-v4)., LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming kitchen exhaust requirements., ]
