Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "LEED Interpretation" "10170" "2012-04-01" "Mid-rise" "For part (c) of the mid-rise Rating System, if the only connection between the garage and the living spaces is an elevator shaft, do the elevator doors count? Are there any special requirements for the elevator doors?" "If the elevator doors provide a complete air-tight seal, this is acceptable. Updated 10/1/13 for rating system applicability." "None" "None" "LEED Interpretation" "10171" "2012-04-01" "Homes, Mid-rise" "Is it acceptable to locate the AHU in a sealed mechanical closet or room that only opens into the garage?" "An air handler unit may be not be located in a mechanical closet or room that only opens into the garage unless the following are met: 1) the mechanical closet that holds the AHU is fully isolated from the garage; 2) the mechanical closet is directly connected to the living space or outdoors; 3) the doors to the mechanical closet are sealed and gasketed; 4) the doors to the mechanical closet are either self-closing OR tied to a trigger that prevents the AHU from operating when the doors are open OR clear signage is posted to keep the doors closed at all times and the homeowner or building manager is trained on the importance of keeping garage air out of the mechanical closet; and 5) a 3rd party has verified (using a blower door test) that the mechanical closet has less than 2 Pa of connection to the garage when the house is depressurized to 50 Pa. Updated 10/1/13 for rating system applicability. " "2746" "None" "LEED Interpretation" "1777" "2007-06-19" "Homes, Mid-rise" "Generally, where is the garage plane defined for IEQ credit 10? If the supply ducting is installed above the garage, is that acceptable? The ducts are sealed, and the garage ceiling is painted drywall and sealed using caulked Thermopan and spray foam. " "Within LEED for Homes, the garage is defined by its fire-rated envelope, so any ducts that are located outside the fire-rated envelope are considered outside of the garage. See EQ 10-09a for details about locating the AHU in a sealed closet that opens into the garage. Updated 10/1/13 for rating system applicability. " "None" "None" "LEED Interpretation" "2005" "2008-01-17" "Homes, Mid-rise" "This credit includes the language ""Seal all connecting floor and ceiling joist bays"". We assume that this refers to the seams between the walls of the garage and the ceiling. What does it mean?" "The intent of this requirement is to ensure a continuous air barrier between the garage and the rest of the home. Please see the EEBA guides for more specifics on how best to achieve a continuous air barrier. Updated 10/1/13 for rating system applicability. " "None" "None" "LEED Interpretation" "2073" "2008-04-01" "Homes, Mid-rise" "We have a home that plans to have two separate HVAC systems - one for the garage and one for the home. In this case, is it okay if the HVAC system that serves the garage is located in the garage?" "Yes, if the HVAC systems are completely separate (i.e. no shared ductwork, no shared AHU, etc.) then it is okay to have the garage HVAC system located in the garage itself. Updated 10/1/13 for rating system applicability. " "None" "None" "X" "LEED Interpretation" "2575" "2009-06-13" "Mid-rise" "The Mid-rise Pilot Guideline states that this credit can only be met by installing continuous exhausting fans. This project would like to install exhaust fans with CO monitors as an alternative to meet the intent of the credit. The structured parking deck will contain exhaust fans and carbon monoxide (CO) monitors on each level. When the monitors detect that CO levels reach 35 ppm, the exhaust fans will activate automatically until levels reach the safe and desired levels. " "**Updated 10/1/14: Following v4 credit for EQ credit Enhanced Garage Pollutant Protection on controls is acceptable. They state ""The exhaust fan may either run continuously, or on a carbon monoxide sensor that turns on the fan when ambient CO levels reach 35 ppm."" Previous ruling no longer valid (for reference only): The use of carbon monoxide sensors to trigger the ventilation system may be used to turn on exhaust fans when the ambient CO levels reach 35 ppm. Carbon monoxide sensors must be placed strategically so that they cover the entire the garage. " "Garage pollutant protection - reverse old ruling" "None"