Option 3: Prescriptive—Advanced Buildings Core Performance Guide
Option 3: Prescriptive—Advanced Buildings Core Performance Guide
Option 3: Prescriptive—Advanced Buildings Core Performance Guide
Follow EAp2 steps for compliance and documentation.
Option 2: Prescriptive—ASHRAE Advanced Energy Design Guides
By this stage, the architect should have seen a visual presentation by the energy modeler on multiple building forms with energy-use comparisons. This will help hone in on the most energy-efficient design that also supports the building program.
Consider other techniques to upgrade the building envelope and insulation, such as:
High performance glazing
Spray-foam insulation
Additional roof insulation
Highly-reflective roofing application
green roofs
exterior shading devices.
Daylighting makes for welcoming spaces, and can save energy both through reduced electric lighting and reduced cooling load due to the reduced electric lighting. Consider an atrium and skylights to serve ventilation and light functions. Integrate spatial programming within the atrium to utilize the space. See LEEDuser’s daylighting strategy for more.
Ventilation is one of the largest energy end-uses. Look at alternative means of ventilating your building. Consider naturally ventilated spaces, mixed-mode ventilation for moderate climates, and demand-controlled ventilation for mechanically ventilated spaces.
Google SketchUp is good for shading studies, and plug-ins are available for IES and EnergyPlus to support energy analysis of Google SketchUp models.
Ecotect and IES Virtual Environments, among other software tools, allow very quick analysis of alternative building forms and mechanical systems, allowing you to test alternative ideas, and develop a single idea in an iterative design process. (See Resources.)
Further develop energy optimization strategies with the design team. Look at reducing loads while creating a comfortable environment within the shell. Look at reducing east and west exposures, and at providing south windows with exterior shades to make a design feature out of passive techniques. Discuss highly efficient system design at this stage, before your design is finalized—for example:
double wall systems
ground-source heat pumps
underfloor air distribution.