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ASHRAE 90.1-2010 Lighting Controls

NC-v4 EAp2: Minimum Energy Performance
posted by Gopinath Vasu on Apr 6, 2019, 11:37 am

Hi All,

I have a doubt regarding ASHRAE 90.1-2010 section 9.4.1.2a – “Space Control: The controlled lighting shall have at least one control step between 30% and 70% of full lighting power...

Last reply: Marcus Sheffer, Jun 12, 2019, 8:32 am

Heat rejection

NC-v4 EAp2: Minimum Energy Performance
posted by Hagen Bork on Jun 3, 2019, 7:41 am

Can you define what "heat rejection" is? I'm not exactly sure which energy counts towards "heat rejection".

Is it the amount of energy that the cooling unit needs to eject the heat...

Last reply: Marcus Sheffer, Jun 3, 2019, 4:48 pm

Overventilation for Stack Effect

NC-v4 EAp2: Minimum Energy Performance
posted by on May 28, 2019, 10:34 pm

I'm working on an energy model for a high-rise project in the Pacific NW that has office and residential, with residential being the top two-thirds of the building. In this region we are...

Last reply: Marcus Sheffer, May 29, 2019, 11:09 am

Baseline System Selection in LEED v4

NC-v4 EAp2: Minimum Energy Performance
posted by Samer Hassanie on May 8, 2019, 6:26 am

This is in regards to Eap2 Minimum Energy Performance and Eac1 Optimized Energy Performance.

We need help with choosing the baseline system for a v4 BD+C residential project in Sweden (...

Last reply: Samer Hassanie, May 10, 2019, 3:25 pm

Shadow Boxes: Counts as Fenestration or Opaque Surface?

NC-v4 EAp2: Minimum Energy Performance
posted by Waleed AlGhamdi on Apr 25, 2019, 4:45 pm

Spandrel panels are considered as opaque surfaces per the ASHRAE 90.1 definition. Kalwall and similar products count as fenestration since they allow in light. What about a "shadow box" in a...

Last reply: Marcus Sheffer, May 1, 2019, 1:47 pm

Min. Outdoor Air- Laboratories

NC-v4 EAp2: Minimum Energy Performance
posted by Isabel Santos on Apr 30, 2019, 8:04 am

Hello,

We are currently working on a LEED assessment regarding a Laboratory Building. The proposed design includes a number of labs that are separated from corridors/transition...

System 7 Reheat box leaving temperature

NC-v4 EAp2: Minimum Energy Performance
posted by Przemysław Rejczak on Apr 15, 2019, 9:02 am

Dear Everone,

We are using new version of Carrier HAP 5.11i software which forces us to set leaving temperature for reheat box. There is no requirement for reheat box temperature in...

Last reply: Tyler Thumma, Apr 26, 2019, 10:03 am

Calculating Conditioned Area

NC-v4 EAp2: Minimum Energy Performance
posted by Keith Wallace on Apr 11, 2019, 3:38 pm

Given a building with all conditioned spaces, what is recommended or required to determine the conditioned area square footage?  Do you take measurements from the exterior face of the exterior...

Last reply: Marcus Sheffer, Apr 12, 2019, 11:11 am

Campus project with central plants serving several buildings

NC-v4 EAp2: Minimum Energy Performance
posted by Yoyo Shek on Apr 10, 2019, 11:38 pm

Hi All,

Our project composed of several buildings which share a group of main central plants (including several chillers and cooling towers).

Does below approach correct?

...

Last reply: Marcus Sheffer, Apr 11, 2019, 8:19 am

Daylight Sensors in Factory Area

NC-v4 EAp2: Minimum Energy Performance
posted by N Sai Balaji on Apr 10, 2019, 1:51 am

Hi,

I am working for a proposed LEED Factory in Bangladesh. As part of Mandatory requirements in ASHRAE 90.1 2010 Section 9.4.1.4, Automatic Daylighting Controls for Primary Sidelighted...

Last reply: Marcus Sheffer, Apr 10, 2019, 11:29 am