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NC-v4 EAp2:Minimum energy performance

Regd. consideration of miscellaneous loads in both proposed & baseline cases as per ASHRAE 90.1 2010

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Anurag Ghosh
Assistant Sustainability Manager
L&T Construction
LEEDuser Basic Member
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Hello all,

I am confused regarding the consideration of some miscellaneous loads. Does ASHRAE 90.1 2010 PRM specify anything about consideration of loads like lift loads, loads from STP/WTP, escalator loads, and vending machine loads while tallying the final energy consumption of both proposed and baseline. What I am doing is using a separate spreadsheet, working out with the actual schedules and summing up these loads in both the proposed and baseline cases. I know it doesnt affect the final energy savings figure but does affect the EUI for the proposed design case. Appreciat your reply on this.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Fri, 02/28/2025 - 16:42

All energy use within and associated with the project must be included. Those all sound like process loads (i.e. they are not regulated by 90.1). They must be modeled identically. If any process load contributes a heating or cooling load to a space it must be included within the energy model and not separately modeled in a spreadsheet and added to the modeling results.
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Anurag Ghosh
Assistant Sustainability Manager
L&T Construction
LEEDuser Basic Member
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Fri, 02/28/2025 - 17:09

Hi Marcus, we even account for service water heating but perform using a separate software called RET screen as opposed to energyplus. Similarly, loads from sewage and water treatment plants and lifts & escalators are accounted using a close to operating schedule and calculated in spreadsheet. Hope we are not going on a wrong direction? is there any separate section which segregates the process load types & regulated load types in ASHRAE 90.1 2010?  Thanks for your reply.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Fri, 02/28/2025 - 18:11

Service hot water is fine because it does not impact the internal loads, unless you are using a heat pump water heater, then it might. If the motors that run the lifts and elevators are in unconditioned spaces it is fine. Any process load within a conditioned space that contributes to the loads in that space must be modeled within the modeling software. For example, if you have a refrigerated vending machine that will affect the internal loads and therefore it must be modeled within the modeling software.
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Anurag Ghosh
Assistant Sustainability Manager
L&T Construction
LEEDuser Basic Member
2 thumbs up

Sat, 03/01/2025 - 04:49

Got it Marcus. Thanks for the explanation. In some projects, we come across electric geysers(of capacities 3kW-5kW) provided in BOH shower areas. The number of geysers are also limited to 4-5 shower areas. Is it necessary to account for these electric geysers or we can ignore them as it doesnt greatly affect the EUI?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 03/03/2025 - 16:32

All energy use within and associated with the project must be included.

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