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) "Reference Guide Correction" "100000617" "2009-10-27" "Homes" "None" "None" "Homes, 2008 edition" "286" "Column 1" "[Add new paragraphs before last paragraph, starting with ""This credit can be earned...""]\n""Dehumidification equipment is not required to maintain RH <60% for every hour of the year; projects are granted some discretion. When determining latent loads to include, use ASHRAE Fundamentals or a comparable standard. Loads should include outdoor loads from ventilation and air leakage, as well as indoor loads from showers, cooking, etc.""\n" "LEED Interpretation" "2057" "2008-02-19" "Homes, Mid-rise" "It appears that EQ 3 has been changed so that a project must install a system that will maintain an indoor RH at or below 60% in peak load calcaulations. In Version 1.11, you could get this point for doing the calculation even if no additional dehumidification was required. Is that still true?" "This credit cannot be earned without including either an additional dehumidification (or humidification) system or dehumidification (or humidification) mode controls on the AC system. Updated 10/1/13 for rating system applicability. " "None" "None" "X" "LEED Interpretation" "5010" "2007-02-15" "Homes, Mid-rise" "Could a home earn these points by conducting a moisture load analysis and then installing an HRV on a humidistat?" "Yes, an HRV on a humidistat is acceptable if it meets the requirements of the moisture load control. Updated 10/1/13 for rating system applicability. " "None" "None" "LEED Interpretation" "5318" "2008-05-17" "Homes, Mid-rise" "EQ credit 3 requires the project to ""install dehumidification equipment with sufficient latent capacity to maintain relative humidity at or below 60%"". Under what conditions should this RH requirement be met - at design conditions? 100% of the year? 95%? Requiring hourly calculations might be overly burdensome.\n\nWhat latent loads are assumed in the house? It\'s always possible to have 10 people living there and running the shower continuously. I think it would be helpful to have LEED spell out the latent loads they\'d like to have considered. I\'d suggest relying on ASHRAE Fundamentals or something similar." "The TASC does not want to create performance standards for this measure, so it will be largely left to the discretion of the Provider and Green Rater. The dehumidification equipment should not be expected to maintain RH < 60% for every hour of the year, as that is unreasonable. However, maintaining RH < 60% at design conditions is insufficient. If the system is designed to accommodate 90-95% of the hours in the year, that is acceptable.\n\nWhen determining the latent loads to include, it\'s reasonable to follow ASHRAE Fundamentals or a comparable standard. The latent loads from the ventilation system should be included, as well as reasonable indoor loads associated with occupant behavior. Updated 10/1/13 for rating system applicability. " "None" "None" "LEED Interpretation" "5337" "2008-12-08" "Homes, Mid-rise" "This project has a humidistat that will call for the air conditioning to run if the preset humidity is exceeded - regardless of temperature. Thus, the A/C is the dehumidifier. Is that acceptable for earning this credit?" "This approach is not acceptable; the system must be able to dehumidify without providing cooling. Updated 10/1/13 for rating system applicability. " "None" "None" "X"