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

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?

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

View answers »

Forum discussion

Healthcare-v4 EAp2:Minimum energy performance

ASHRAE 90.1-2010 Envelope mandatory requirements

Hi all,

As per ASHRAE 90.1-2010: 5.4.1 Insulation. Where insulation is required in Section 5.5 or 5.6, it shall comply with the requirements found in Sections 5.8.1.1 through 5.8.1.9.

I understand that insulation is not mandatory but what does this mean for projects targeting a LEED rating and therefore only complying with the mandatory requirements? Can it be ignored?

Or does it mean that all installed insulation must comply with the requirements in Sections 5.8.1.1 through 5.8.1.9?

Or does it mean that if you are following 5.5 Prescriptive Building Envelope Option or 5.6 Building Envelope Trade-Off Option then you must comply with the requirements in Sections 5.8.1.1 through 5.8.1.9?

 

Thank you

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, 12/14/2023 - 06:26

Since posting this question I found this information in the Standard 90.1 User's manual: Compliance with the standard requires that the mandatory provisions be satisfied in all cases. Section 5.4 contains the mandatory requirements for the building envelope. The mandatory requirements include insulation installation requirements (applicable to the Prescriptive Building Envelope Option and Building Envelope Trade-Off Options only) and requirements for reducing air leakage.   This suggests to me that insulation installation requirements must only be complied with for the Prescriptive Building Envelope Option and Building Envelope Trade-Off Options only. Am I understabding this correctly?
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 12/14/2023 - 15:53

LEED requires compliance with all mandatory provisions. The amount or level of insulation is not mandatory, this is a prescriptive requirement. There are insulation characteristics and installation requirements in Sections 5.8.1.1 through 5.8.1.9 that are referenced in Section 5.4 so they are mandatory. What you are looking at are code compliance options that don't really come into play for LEED.

Add new comment

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