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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

21 points

Hi Guys I have a pleasant dilemma. The project is new build offices in climate zone 5a. The energy model indicate savings of 39.52% from the baseline. When I calculate the costs manually, to take advantage of the ACP, I get 52.9% developer influenced costs. Via the ACP, 39% savings with 53% influence gives me 21 points. Has anyone seen this before (considering it is a good, but not ground breaking building)? Thanks

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 07/29/2013 - 13:29

Really good for a CS project is often pretty ground-breaking. What the % influenced does is lower the thresholds for the points. So your percent savings relative to what is within your control is pretty impressive.

Mon, 07/29/2013 - 14:38

Thanks for the reply Marcus The fact that Gas is less 1/3 of the value of Electricity may be helping me ...but I don't set the prices! We also have no electric heating and no electric service water.
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Mike Barker
Principal : Energy / Electrical Engineer
BuildingPhysics South Africa
LEEDuser Basic Member
94 thumbs up

Tue, 08/20/2013 - 03:25

We see some large improvements when modelling naturally ventilated buildings in mild climates too. Sometimes the ASHRAE baselines have large ( maybe excessive ) energy costs compared to the actual ?
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 08/20/2013 - 14:22

One can certainly argue that the ASHRAE baselines do not make sense in certain situations. On the other had it is incredibly difficult to come up with any system that accommodates every situation.

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