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 :

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?

For a project outside the U.S., how do I determine the climate zone?

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?

View answers »

Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Dynamic model compliance analysis results

František Bartoš

Ing.

Enerfis s.r.o.

LEEDuser Basic Member

0 thumbs up

November 19, 2013

Hello, I made model using eQuest 3.65 and after simulation, baseline building generation and results compliance I see 55 % percent improvement in proposed design against the baseline design. This model is just schematic for CS precertification but the envelope is modeled with most probably final design that will be built. The envelope is kind of a modular system with overall U factor 0,14 BTU/ft2/hr*F per modul (it means both glass a wall parts). My question - is it possible to get 55 % improvement against the baseline with this U factor? I checked, that LEED requirements is Umax 0,513, so our value is very good compared to this requirements. However compared to our local norms (Czech republic) it is not anything extra, so the 55 % percent improvement surprised me. In HVAC system I used everywhere standard efficiencies of motorts, pumps etc. and VSD regulation, but this I think doesn´t have as large impact on the result as the envelope - or does it have? Thanks a lot for all thoughs and answers. František

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 11/25/2013 - 17:12

If the only variable is the envelope then 55% savings is far greater than I would expect. In our experience a significantly improved envelope could result in up to a 20% improvement.

Add new comment

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