5 July 2002
GENERAL. The final design shall be a continuation and extension of the
approved concept design. The engineering and economic analysis performed as part of
the concept design shall be updated as necessary and included as part of the final
design package. Each of the systems, features and components considered during the
final design shall be identified and the engineering and economic analysis supporting
the design decision for implementation or rejection shall be included.
ASHRAE STANDARD 90.1 COMPLIANCE. Full compliance with the
Mandatory Provisions and either the Prescriptive Path or the Energy Cost Budget
Method shall be clearly demonstrated. Where life cycle cost effective, the Mandatory
Provisions of ASHRAE 90.1 and the selected compliance path or method should be
exceeded. The engineering and economic analysis supporting the decisions should be
included in the final design package. In those rare cases where the Mandatory
Provisions of ASHRAE Standard 90.1 and the selected compliance path or method are
not cost effective and a more energy intensive system, feature or component will
provide a lower life cycle cost, a detailed justification with life cycle cost comparisons,
including the assumptions used in the analysis and unusual facility features or
operations, shall be included in the final design.
Mandatory Provisions. The final design package shall identify each of the
required features applicable to the facility and demonstrate compliance. Any deviations
shall be clearly identified and the engineering and economic analysis supporting the
Prescriptive Path. The Simplified Approach Option for HVAC Systems may
be used where the specific system and facility design meets all of the relevant ASHRAE
Standard 90.1 criteria. In all other cases the detailed requirements of the Prescriptive
Path, as a minimum, shall be carefully followed. The final design package shall identify
each of the features applicable to the facility and demonstrate compliance. Any
deviations shall be clearly identified and the engineering and economic analysis
supporting the deviation provided.
Energy Cost Budget Method. The final design shall include a full
description of both the prototype or reference building and the proposed design with
supporting engineering and economic analyses including the inputs, outputs and
assumptions used in the computer simulations and programs.
PHOTOVOLTAIC. Photovoltaic power generation is most likely to be life
cycle cost effective where there is a relatively small power requirement compared to the
cost of connecting the load to the existing electrical grid or where the alternative is
diesel driven generation or batteries. In these cases a study comparing the "baseline"
design with prospective photovoltaic applications will be performed. Such projects