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

Proposed Model HVAC Efficiency for Tenant Space

I'm modeling a commercial building. The business rooms are all leased, and will have an air conditioning system. What is the value of efficiency in the proposed model should I use? The ASHRAE 90.1-2007 as value? That can not be bad, considering that the gains will be smaller? Thank you!

0

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Thu, 08/28/2014 - 14:33

If a design exists, the Proposed is modeled as designed (see Table G3.1-1 and G3.1-7). The Baseline is according to Appendix G.

Thu, 08/28/2014 - 14:43

Thank you Marcus! I know about that, but the point is that there is not a project for commercial offices. It will be the responsibility of the renter and we indicate the parameters in the lease aggrement. In this case, my proposed model (commercial offices) should have efficiencies as ASHRAE?

Thu, 08/28/2014 - 15:16

So if the spaces are not designed and you do not have specific requirements that effect the energy use of the HVAC design in the tenant lease agreement, then you model the HVAC identical to the Baseline system. So yes in this scenario the efficiency would be the ASHRAE minimum. It is not clear from your post what specific HVAC parameters are in the lease agreement.

Thu, 08/28/2014 - 16:16

When i said parameters, is about the COP of equipments according to the system type. Now i understand. Tks for all!

Thu, 08/28/2014 - 16:21

If you require a minimum efficiency higher than the ASHRAE minimum in the lease agreement then you can claim energy savings for this parameter.

Thu, 08/28/2014 - 16:54

In this case, I could use a minimum efficiency value greater than the ASHRAE, and the lease agremment indicate that this value should be the minimum that the tenant must meet in your project?

Thu, 08/28/2014 - 17:03

I think we are saying the same thing, so yes.

Thu, 08/28/2014 - 17:08

So understood. Thank you Marcus!

Tue, 10/28/2014 - 10:10

Hello, I'm just jumping on the end of your conversation. We have done the Design Stage Energy Performance simulation with known and unknown HVAC equipment for a multi-use Core & Shell building. Can you confirm that we do not need to re-submit this simulation at Construction Stage. Thank-you, Ian

Sun, 11/02/2014 - 23:32

If anything changed during construction that affected the modeling results you are required to adjust the models and resubmit them. The same holds true for any credit. If nothing changed it does not get resubmitted.

Add new comment

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