Forum discussion
NC-2009 EAp2: Minimum Energy Performance
My project has a dayligh dimming system and alos the curtain of each window. The reviewer ask me to add the effect of how this curtain will be modeled. Normally this curtain will be operated by the building operators and will be pull down only if the direct sun causing glare. Can we write the narrative this way and maintain the original energy model without any window curtain? If not, how should we model the curtain?
Thanks
LEEDuser is supported by our premium members, not by advertisers.
Go premium forTo post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.
A portion of our building envelope is historic. Can we exclude it from our model?
For an existing building, do I need to rotate the model?
Our process load is higher than 25%. Do we have to justify that?
Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?
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?
Which baseline HVAC system do I use if my building has no heating or air conditioning?
Our project has a diesel backup generator. Should we include it in our energy model?
Can SHGC be higher in the proposed than in the baseline model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
March 30, 2015 - 2:27 pm
Interior shades must be automatically deployed to claim any savings. If they are manually deployed you cannot claim any savings. Operated by building operators is manual (even if the curtain deploys with a motor).
You can model the curtain properties in some software. It gets scheduled like everything else. It is modeled identically unless it is automatically controlled with a sensor.
Jatuwat Varodompun
DrGreen Building Soultion
26 thumbs up
March 30, 2015 - 9:15 pm
The reviewer seems focusing on the visual transmittance reduction. So, should we just apply the schudule of the interior blind for the PROPOSED MODEL? For the baseline, visual transmittance has no impact on energy consumption.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
March 31, 2015 - 10:25 am
There is the visual transmittance of the glass and also the transmittance of the blinds. Agree that in the baseline the energy use would not be impacted.
The blinds must be modeled identically in both models unless there automatic controls for the blinds. If there is automatic controls you should provide an explanation for how your schedule reflects the operation of the controls.