[Bldg-sim] LEED - What does it take?

[RobertWichert]

My current project has very good windows, "standard" walls, you're right 
about the lighting, it's right on budget (but residential doesn't really 
have a budget, so the small common areas are right on budget), better 
than standard roof.

I absolutely agree with you, Nick, on achieving 10% better, but all the 
trades point to the others.  It's kind of comical, actually.

I guess my question on this list could be rephrased, using your 
approach, as "What SEER is 10% better than SEER 13?"




Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068







===============================================

On 1/16/2013 12:34 PM, Nick Caton wrote:
> A very simple way of looking at LEED & energy, which I come back to often for discussions on that level, is to consider a building's performance like a tripod with three important legs:  Lights, Mechanical, and Envelope.  If any of those legs is too short, the tripod falls over.
>
> Building on that analogy, to do 10% better than a LEED baseline, a good starting place is to have at least:
> -  10% better lighting (10% lower LPD),
> -  10% better HVAC & hot water heating (10% better efficiencies), and
> -  10% better envelope (10% more insulation in walls/roof, 10% better windows).
> For each of these, you can source the baseline/prescriptive levels from the standard of your choosing.
>
> Overperforming in one area can sometimes make up for underperfomance in another, but with diminishing returns.  Amazing HVAC equipment/design has a harder time shining when you have a poor envelope and/or the lighting designer treats LPD's as a "budget" they have to use up.  For such reasons, it's advisable to always consider building performance in holistic fashion in early/broader discussions.
>
> That's my (simple) take anyway!
>
> ~Nick
>
> 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.com
>
>
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of RobertWichert
> Sent: Wednesday, January 16, 2013 9:24 AM
> To: EnergyPro at yahoogroups.com; bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] LEED - What does it take?
>
> I know that LEED is way more than just energy, and energy is way more than just equipment, but just for a basis, what SEER and EER do people have to use to get 10% better than ASHRAE 90.1 to qualify for LEED?  I also know that you don't have to use ASHRAE 90.1, but that is what I am doing.
>
> So, what does it take?
>
> My shot - Residential Apartment, individual DX units, 17 SEER and 13 EER in California CZ 12 (Mostly cooling).
>
>    Next?
>
>
> --
> Robert Wichert P.Eng. LEED AP BD&C
> +1 916 966 9060
> FAX +1 916 966 9068
>
>
>
>
>
>
>
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