EA Credit 1.3
EA Credit 1.3 Optimize Energy Performance: HVAC

Meet e-benchmark requirements for HVAC and zone spaces accordingly OR reduce energy use of HVAC by 15% or 30% of the basline standard set by ANSI/ASHRAE/IESNA.

Prescriptive Performance

BASELINE

1-2 PTS

EA Credit 1.3 Intent
Achieve increasing levels of energy conservation beyond the prerequisite standard to reduce environmental impacts associated with excessive energy use.

HVAC Optimize Energy Performance

Opt A

Equipment Efficiency

 

Appropriate Zoning and Controls:

  • Solar Exposure
  • Interior spaces separately zoned
  • Private offices & specialty occupancies must have active controls capable of sening space us and modulating HVAC system in response to space demand

HVAC Optimize Energy Performance

Opt B

  • Demonstrate that HVAC system component performance criteria used for tenant space are 15% better than a system that is in minimum compliance with 90.1 (1 POINT)
  • Demonstratve that the above is 30% better than 90.1 (2POINTS)

Provide a narrative description of the HVAC system serving the tenant space as well as a description of the building level system.  Plans and specs shouldhave an HVAC equipment schedule and ___________________________.

plans showing the equipment within the space.
E-benchmark
it is offered as a prescriptive approach where the ASHRAE/IENSA Section 11 is performance based.

The major difference btw Opt A & Opt  B is that

the minimum equipment efficiency requirements in OPT A are more stringent than the minimum requirements in 90.1
The second part of Option A is ____________ approach to the zoning and controls for commercial interior projects.
a prescriptive
Every solar expose must have a
separate control zone.
Each side of a rectangular building with fenestration should be
zoned separately
Interior ________ are another source of solar exposure and may warrant a separate zone as well.
skylights
Private offices and specialty occupancies (conference rooms, kitchens, etc.) must have ____________ capable of sensing space use and modulating HVAC systmes in response to space demand.
active controls
___________ are a means to reducing energy consumption by modulating the supply of outdoor air.
Occupancy sensors
________ does not recognize energy efficient design of air distribution systemsl however PRM does.

ECB

Energy Cost Budget

Review Table 2 Option b On pg 161
the differential between the DEC and EcB increase as the energy eficiency of the existing building
decreases
It could be easier to reach the credit thresholds in a less-efficient building.
True
If the ______ are more energy efficient than the prescriptive requirements of 90.1, replace the existing conditions in the baseline model with the 90.1 requirements.
existing conditions
Project teams can base their credit calculations on _____________.  Document the choice made in the narrative included with the submittal.
either baseline
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