See all forum discussions about CS-2009 EAp2

Subscribe to new posts about CS-2009 EAp2 Post a new question aboutCS-2009 EAp2

See LEEDuser’s guidance on CS-2009 EAp2»

FAQs about EAp2 :

For a project outside the U.S., how do I determine the Target Finder score?

Do hotel rooms need automatic light shut-off control?

How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

The Section 9 space-by-space method does not include residential space types. What should I use?

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

A portion of our building envelope is historic. Can we exclude it from our model?

Which baseline HVAC system do I use if my building has no heating or air conditioning?

For an existing building, do I need to rotate the model?

Our project has a diesel backup generator. Should we include it in our energy model?

Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the p

Can SHGC be higher in the proposed than in the baseline model?

Our process load is higher than 25%. Do we have to justify that?

Do I need to justify the electrical and fuel rates I am using in my model?

Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

The project is built on a site with existing exterior lighting installed. How should this be accounted for?

Can mezzanines open to floors below be excluded from the energy model?

How do I provide a zip code for an international location?

View answers »

Forum discussion

CS-2009 EAp2:Minimum Energy Performance

DES -option2: virtual rate

Johannes Gellrich

LEEDuser Basic Member

15 thumbs up

October 5, 2012

Modeling a DES system after Option 2, we got the energy consumption and prices from the DES. With these we calculate our virtual rates according to 2.4.2. The DES uses a mix of gas, coal, waste and oil. My questions: 1. In my understanding, the DES guide is a bit short on which energy type should be used in the baseline. Yet we used gas as it was the main energy source of the DES. 2. The DES operater provided us with his gas procurement costs which are nearly half of the average gas prize for commercial customers. I would like to argue that only the DES is able to get such a low prize due to its high consumption and therefore use the actual (low) gas prize in the DES virtual rate and the average gas prize for commercial customers in the baseline case. Would be great to get your thoughts on this!

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 10/18/2012 - 14:48

1. You should use the same fuel mix for the baseline central plant. 2. You can try to argue that point but Appendix G and the DES are pretty clear that the rates must be identical in both models.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.