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NC-v4 EAp2:Minimum energy performance

Mandatory Provisions of ASHRAE 90.1 2010,limit of application

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Cédric Marzolf
Specialist in energy modeling
LEEDuser Basic Member
2 thumbs up

Hi all,

 

Our building code is less restrictive than the ASHRAE 90.1 2010 for all the lighting controls and efficiency strategies.

The minimum energy performance intent to respect all the mandatory provisions of the 90.1.

I understand that the design of a LEED concept is better in efficiency strategies than a normal concept, but when I check the mandatory formulars and the 90.1 related sections for lighting controls, 90.1 2010 becomes more restrictive than the LEED credit "IEQc interior lighting".

So do we need to respect all the mandatory through all the detailled sections of 90.1 2010 or we need the comply with the credit requirement of the LEED lighting credit ? Where is the limit of application ?

 

Greeting

 

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 01/18/2018 - 15:04

Well that is interesting, I had not compared the two. Can you cite the specific provisions? If this is the case then clearly LEED should at least be keeping up with itself. For LEED projects you are required to comply with all of the mandatory provisions of 90.1-2010. EAp2 is a prerequisite and must be earned to attain LEED certification. The interior lighting credit is an optional credit. So you must comply with 90.1-2010 and, if you are correct, doing so automatically contributes toward compliance for the interior lighting credit.
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Cédric Marzolf
Specialist in energy modeling
LEEDuser Basic Member
2 thumbs up

Tue, 01/23/2018 - 15:58

Hi, For example, ASHRAE 90.1 2010, 9.4.1.4, we should provide photocell control for each enclosed space. In our building code, there is nothing about that control, in LEED credits neither. 30% to 70% can just be made by providing a task light in my opinion.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 01/23/2018 - 17:29

There are some differences in the requirements. The 90.1 provisions for daylight controls only applies to perimeter spaces or spaces with skylights. The lighting controls provisions must apply to 90% of all individual occupant spaces and group multi-occupant spaces. Installing these mandatory daylighting controls would probably contribute toward the lighting control credit. So there is some overlap and since you are required to meet the 90.1 mandatory provisions this was just not included in the lighting control requirements in the credit I suppose.
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Sara BENLOUBA
Green building manager
Confidential
LEEDuser Basic Member
13 thumbs up

Wed, 02/05/2020 - 16:30

Hello Dear, I have almost the same question but this time concerns the building envelope. Could you tell us if it is mandatory that the thermal coefficients of my building comply with table 5 - 5.3 of ASHRAE 90.1 which governs the performance of each type of envelope? I'm lost...We are working for a project outside the United States.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 02/05/2020 - 18:18

Only the X.4 sections are mandatory provisions.

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