[Code of Federal Regulations]
[Title 10, Volume 3]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR434.601]

[Page 410-412]
 
                            TITLE 10--ENERGY
 
                    CHAPTER II--DEPARTMENT OF ENERGY
 
PART 434_ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH 
RISE RESIDENTIAL BUILDINGS--Table of Contents
 
            Subpart F_Building Energy Compliance Alternative
 
Sec. 434.601  General.


    601.1 This subpart provides an alternative path for compliance with 
the standards that allow for greater flexibility in the design of energy 
efficient buildings using an annual energy use method. This path 
provides an opportunity for the use of innovative designs, materials, 
and equipment such as daylighting, passive solar heating, and heat 
recovery, that may not be adequately evaluated by methods found in 
Subpart D.
    601.2 The Building Energy Compliance Alternative shall be used with 
subpart C and subpart D, 401.1, 401.2, 401.3.4 and in conjunction with 
the minimum requirements found in subsections 402.1, 402.2, and 402.3., 
403.1, 403.2.1-7, 403.2.9 and 404.
    601.3 Compliance under this section is demonstrated by showing that 
the calculated annual energy usage for the Proposed Design is less than 
or equal to a calculated Energy Use Budget. (See Figure 601.3, Building 
Energy Compliance Alternative). The analytical procedures in this 
subpart are only for determining design compliance, and are not to be 
used either to predict, document or verify annual energy consumption.

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    601.4 Compliance under the Building Energy Use Budget method 
requires a detailed energy analysis, using a conventional simulation 
tool, of the Proposed Design. A life cycle cost analysis shall be used 
to select the fuel source for the HVAC systems, service hot water, and 
process loads from available alternatives. The Annual Energy Consumption 
of the Proposed Design with the life cycle cost-effective fuel selection 
is calculated to determine the modeled energy consumption, called the 
Design Energy Use.
    601.5 The Design Energy Use is defined as the energy that is 
consumed within the five foot line of a proposed building per 
ft2 over a 24-hour day, 365-

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day year period and specified operating hours. The calculated Design 
Energy Use is then compared to a calculated Energy Use Budget.
    601.6 Compliance. The Energy Use Budget is determined by calculating 
the annual energy usage for a Reference or Prototype Building that is 
configured to comply with the provisions of Subpart E for such 
buildings, except that the fuel source(s) of the Prototype or Reference 
Building shall be the same life cycle cost-effective source(s) selected 
for the Proposed Design. If the Design Energy Use is less than or equal 
to the Energy Use Budget then the proposed design complies with these 
standards.
    601.7 This section provides instructions for determining the Design 
Energy Use and for calculating the Energy Use Budget. The Energy Use 
Budget is the highest allowable calculated annual energy consumption for 
a specified building design. Designers are encouraged to design 
buildings whose Design Energy Use is lower than the Energy Use Budget.