Hi everybody,

I've got two questions regarding the pilot credit "No Cooling Tower" which is an alternative compliance path to the LEED v4 credits Cooling tower water use (BD+C).


If I read the credit requirements under the credit library, the first bullet point is confusing me:

Projects without Cooling Towers or Evaporative Condensers (Headline)

Projects may earn full credit if all conditions are met:

  • the baseline system designated for the building using ASHRAE 90.1-2010 Appendix G Table G3.1.1 includes a cooling tower (systems 7 & 8)
  • the project design case does not include a cooling tower
  • ......
  • ......

I don't understand the following part at the end of the first bullet point: "includes a cooling tower".

Therefor my question is: Why should the building system have a cooling tower included? As I understand the pilot credit "No Cooling Tower", this credit can only be applied to projects without a cooling tower. Otherwise I might misunderstand the credit intent or do not read the first bullet point correctly. 


To my project: Based on the floor area, which is more the 14,000 sqm, the project falls within the systems 7 and 8. The heat will be generated by a condensing gas boiler plus heat pumps.  The building will be cooled by a closed cooling circuit which is filled with water. The building does not have a cooling tower and will be designed in accordance with System 7 (ASHRAE 90.1-2010 Appendix G Table G3.1.1). My question to the designated baseline system: Are the credit requirements fulfilled if my project complies EITHER with System 7 OR with System 8, or does the project has to comply with System 7 AND 8?

Thanks in advance for your answers and help.

Best regards