[Equest-users] Hot water use (gal/person/day) in residencesin eQuest 3.65

[via Equest-users]

I did some “Handbook refreshing” in response to this discussion thread and that is indeed the current case (2015 Applications, page 50.15, Table 6 footnote).  The ESMFHR guidelines are a very good resource for multifamily/residential scenarios & a model I’d recommend reviewing for other cases as well.

 

If however you’re dealing with service hot water consumption cases falling outside of typical residential/multifamily context, I might be inclined to fall back on Applications’ suggested baseline gal/day/person DHW consumption guidance for other building occupancy types.  If carrying this into an energy model, I might also consider either using the hourly flow profiles (Fig 24, a few pages following), and/or the ASHRAE “standardized” fractional schedules for various building occupancy types featured in 90.1-1989 & carried forward into a bazillion other energy standards/references.

 

~Nick

 

 

------------------------------------------------------------------------------------------------------------------------------

Nick Caton, P.E.

  Senior Energy Engineer
  Energy and Sustainability Services
  North America Operations
  Schneider Electric

D  913.564.6361 
M  785.410.3317 
E  nicholas.caton at schneider-electric.com <mailto:nicholas.caton at schneider-electric.com> 
F  913.564.6380

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

 

 

 

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Anthony via Equest-users
Sent: Monday, April 25, 2016 10:12 AM
To: 'José Luis Bermúdez Alcocer'
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Hot water use (gal/person/day) in residencesin eQuest 3.65

 

Last I checked, usage information in the ASHRAE handbooks “predates modern low flow fixtures.”  Energy star’s <https://www.energystar.gov/index.cfm?c=bldrs_lenders_raters.nh_mfhr_guidance>  performance path calculator <https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/mfhr/ENERGY%20STAR%20MFHR%20Performance%20Path%20Calculator_V1.5_BLANK.xls?29c8-093e>  is a better reference for this sort of thing.  

 

Anthony Hardman, PE, BEAP, LEED AP BD+C

Senior Building Performance Analyst

The Green Engineer, Inc. <http://www.greenengineer.com/> 

Sustainable Design Consulting

54 Junction Square Dr.

Concord, MA 01742

O: (978) 369-8978

D: (978) 610-2801

C: (720) 840-7862

 

The Green Engineer, Inc. is a Certified B Corporation

 

From: José Luis Bermúdez Alcocer via Equest-users [mailto:equest-users at lists.onebuilding.org] 
Sent: Sunday, April 24, 2016 11:31 AM
To: Equest-users
Subject: [Equest-users] Hot water use (gal/person/day) in residences in eQuest 3.65

 

To whom it may concern:

 

What is the hot water use (gal/person/day) in residences according to the ASHRAE manuals?  Any comments will be highly appreciated!

 

Kind regards,

 

Jose Luis Bermudez Alcocer, Ph.D., M.Arch., B.Arch.


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