[Bldg-sim] LEED - What does it take?
David Eldridge
DEldridge at grummanbutkus.com
Wed Jan 16 14:19:51 PST 2013
Also the SEER only helps you while the A/C is on...meanwhile the lights are chugging along at "budgeted" rates every day eating away your 10% reduction in cooling end-use.
DSE Mobile
On Jan 16, 2013, at 4:12 PM, "RobertWichert" <robert at wichert.org> wrote:
> 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
>>
>>
>>
>>
>>
>>
>>
>> ===============================================
>>
>> _______________________________________________
>> Bldg-sim mailing list
>> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
>> To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
>>
>>
>>
>
> _______________________________________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
> To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
>
More information about the Bldg-sim
mailing list