[Equest-users] DHW savings not for LEED?

[Chris Jones]

The CaGBC adopted a "low flow" fixture credit for 
SWH based on the old CBIP program.  The original 
intent was that low flow lavatories and showers 
(lower than the building code minimum) would 
receive credit.  Unfortunately this was 
interpreted by many to include process SHW loads 
like janitor sinks (filling a bucket uses just as 
much hot water whether the fixture is low flow or 
not).  As a result, SHW savings are often 
overstated in LEED Canada submissions.

I am hopeful this loop hole will be closed at 
some point but so far I haven't seen any movement in that direction.


At 09:53 AM 25/09/2012, Nick Caton wrote:
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>Hi Tim,
>
>“Domestic Hot Water” is coined “Service Hot 
>Water” in 90.1.  Check out Table G3.1, section 
>11 to start.  Baseline efficiencies and such are sourced from chapter 7.
>
>The LEED EAp2 excel template (last I used it – 
>it’s a living document that changes over time) 
>includes inputs to describe what’s modeled for 
>proposed/baseline service hot water 
>systems.   The EAc1 template is set up to permit 
>you to show differing consumptions for proposed 
>vs. baseline in regards to service hot water.
>
>If the proposed system is better than the 
>minimum requirements for efficiency and/or 
>standby losses (as applicable), you should be 
>able to demonstrate some savings.
>
>Best of luck!
>
>~Nick
>cid:489575314 at 22072009-0ABB
>
>
>NICK CATON, P.E.
>SENIOR ENGINEER
>
>Smith & Boucher Engineers
>25501 west valley parkway, suite 200
>olathe, ks 66061
>direct 913.344.0036
>fax 913.345.0617
><www.smithboucher.htm>www.smithboucher.com
>
>From: equest-users-bounces at lists.onebuilding.org 
>[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of tim
>Sent: Tuesday, September 25, 2012 8:25 AM
>To: equest-users at lists.onebuilding.org
>Subject: [Equest-users] DHW savings not for LEED?
>
>The proposed design includes an instantaneous 
>water heater, but I don’t think that counts in EAc1.  Is this correct?
>I couldn’t find mention of DHW in 90.1appendixG 
>so I’m beginning to think it should not be modeled at all.
>
>Also, there is no place to enter domestic hot 
>water usage in the LEED online template.
>
>
>Thanks,
>Timothy W. Hill
><mailto:tim.JRGA at fuse.net>tim.JRGA at fuse.net
>
>John R. Grier, Architect
>11309 Deerfield Road
>Cincinnati, Ohio 45242
>(513)489-3690
>
>
>
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 >>
Christopher Jones, P.Eng.
Suite 1801, 1 Yonge Street
Toronto, ON M5E1W7
Tel. 416-203-7465
Fax. 416-946-1005
email cj at enersave.ca
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