Hi all,
The project that we are working on would like to go pursue this credit using ASHRAE level 2 commissioning audit path. However, this project has a large quantity of AHUs and FCUs (approx. 40AHUs and 450FCUs). So we would like to know:
1) Can we selectively select a few quantities of the air distribution equipment for measurement or do we have to measure every piece of AHUs and FCUs of this project? Is there a minimum quanitites of the equipement to be audited? Example: Minimum requirement = 10% of total FCU quanitites etc..
2) Also, if there are certain items like, for example, AHU cooling coil entering water temperature (EWT) and leaving water temperature (LWT) may be quite challenging to be measured on site, can the project submit the audit report without filling up the measured EWT and LWT figures? Will this be accepted? On the other hand, the project team will try to measure as much measureable items on site.
Thank you so much for the help in answering my questions.
YingYing
David Hubka
Director of OperationsTranswestern Sustainability Services
527 thumbs up
February 1, 2013 - 7:51 am
The credit requirement does not specifically address sampling requirements, however this is a common practice when commissioning very large facilities. Furthermore this credit does not address specific key operating parameters that must be verified by the commissioning team. If your commissioning plan addresses all major energy-using systems (chillers, boilers, lighting, domestic hot water, etc.) and the plan/report includes the components listed on the LEED Online template - your EAc2.1 submittal should be approved. Be prepared though to increase your sampling rate if you find issues with the equipment commissioned within your first sample.