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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Balancing Devices to meet ASHRAE 90.1 Mandatory Requirements

Jorge Torres-Coto

Building Systems Commissioning Engineer

Empirical Engineering, LLC

LEEDuser Basic Member

14 thumbs up

Project location :

November 13, 2015

We have a project that is an industrial facility, it shares the CHW distribution piping between the comfort system and the process system. We are informing the CxTeam that it is required to have balancing means at all connected devices, and/or at a minimum at all comfort devices and each branch going out to the process part of the CHW distribution piping. The owner has CHW flow diagrams indicating the required gpm for their process, including future expansion. Our "requirement" to the owner is to install balancing or flow limiting devices at the process branch piping to be able to meet the requirements of section 6.4.5 and subsequently 6.7.2 of ASHRAE Standard 90.1-2007. Any comment regarding our "requirement" is appreciated. We do not want to obligate the owner to do something that is not a Mandatory Requirement, but we also want to make sure that these are met. Thanks Jorge

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 11/30/2015 - 15:56

Your requirement makes sense to me and also just sounds like a good design practice. If your system can be hydronically balanced without this valve then it would not be mandatory. So the best answer is it depends.

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