See all forum discussions about CI-v4 EAp2
 Subscribe to new posts about CI-v4 EAp2 Post a new question aboutCI-v4 EAp2
See LEEDuser’s guidance on CI-v4 EAp2»
FAQs about EAp2 :

Are there any exceptions to the daylight control requirement of ASHRAE 90.1–2010?

Our proposed design has insulation R-values that are below those prescribed by ASHRAE 90.1-2010. Can we still meet the prerequisite?

Do the required savings for this prerequisite (and credit) need to come only from building energy, or also process loads?

Our project doesn't have enough energy savings to earn the prerequisite. Can we get there by incorporating onsite renewables?

Does the base building information need to be included in the minimum energy performance calculator, or is it sufficient to just include the tenant space?

View answers »

Forum discussion

CI-v4 EAp2:Minimum energy performance

Energy model pump baseline for ultra tall buildings

Default Avatar
Samantha Allen
Associate Director
M Moser Sustainabililty
LEEDuser Premium Member
0 thumbs up

Has anyone run up against issues in energy modelling for spaces in ultra tall buildings? LEED baseline in IES 6x lower than the actual for the building. While the building efficiency is ultimately good and achieved LEED Gold BD+C, we are struggling to get our model to make sense - the pump Btus are 6x higher than a 2010 ASHRAE 90.1 baseline. We know that this is because they are pumping to over 1000 feet vertically, but can't find an exemption anywhere or reference for how this might be better understood. Would really appreciate any feedback, especially from those who have done CI projects in a CTBUH building.

0
Post a reply

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, 03/19/2026 - 18:32

The Baseline W/gpm pump power allowances are based on a pre-determined head setting for each type of loop and do not vary with the size or height of the actual building. This inherently penalizes tall buildings with centralized pumps and I am not aware of an exceptions to these allowances.

Add new comment

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