§ 435.101 - Implementation and compliance procedures for Federal agencies.

Alternative methods of achieving compliance are illustrated in Figure 1.1-1.

EC04OC91.080 1.1Compliance

1.1.1The head of each Federal agency responsible for the construction of Federal buildings shall adopt such procedures as may be necessary to assure that the design of the building shall:

1.1.1.1be undertaken in a manner that provides for appropriate consideration of the Principles of Effective Energy Building Design prescribed in §§ 2.0, 3.2, 4.2, 5.2, 6.2, 7.2, 8.2, 9.2 and 10.2;

1.1.1.2comply with the minimum requirements of §§ 3.3, 4.3, 5.3, 6.3, 7.3, 8.3, 9.3 and 10.3; and

1.1.1.3meet or exceed, based upon the analysis of life-cycle cost-effectiveness required by § 1.1.2 below, the following additional requirements:

1.1.1.3.1the lighting design shall meet either the prescriptive requirements of § 3.4 or the system performance requirements of § 3.5,

1.1.1.3.2the building envelope design shall meet either the prescriptive requirements of section 5.4 or the system performance requirements of section 5.5, and

1.1.1.3.3the heating, ventilating and air conditioning systems design shall meet the prescriptive requirements of section 7.4, and

1.1.1.3.4the service water heating systems design shall meet the prescriptive requirements of section 9.4.

1.1.2In lieu of meeting the provisions of section 1.1.1 above, the building design shall meet the criteria of the building energy method of section 11.0 or 12.0, Building Energy Compliance Alternatives I and II.

1.1.3The head of each Federal agency responsible for the construction of Federal buildings shall also assure that the decision-making process for the design of the building shall employ the methodology for estimating and comparing the life-cycle cost of Federal buildings and for determining life-cycle cost-effectiveness prescribed in subpart A of 10 C.F.R. part 436.

1.2General Approach to Compliance

1.2.1The standards, in addition to minimum requirements, establish three alternate methods to determine whether the design has achieved compliance.

1.2.2There are several alternative methods of achieving compliance provided for in the standards:

1.2.2.1Prescriptive (Sections 3.4, 5.4, 7.4 and 9.4),

1.2.2.2System Performance (Sections 3.5 and 5.5), or

1.2.2.3Building Energy (Section 11.0 or 12.0).

1.2.2.4The criteria established for each of the methods allow for designs that are roughly equivalent in terms of energy conservation. The equivalency of the methods can be demonstrated by designing a building using the Prescriptive approach, then modeling the building using either the System Performance or Building Energy criteria calculation procedures and comparing results.

1.2.3Compliance with these standards shall be demonstrated by meeting the set of minimum requirements defined in Sections 3.2, 3.3, 4.2, 4.3, 5.2, 5.3, 6.2, 6.3, 7.2, 7.3, 8.2, 8.3, 9.2, 9.3, 10.2, and 10.3 and one of the alternative methods.

1.3How To Select a Compliance Method

1.3.1Use the Prescriptive method when the minimum amount of calculation and effort to achieve compliance is of primary concern. Its requirements can be readily specified in construction documents and are easily reviewed by building code enforcement authorities. The Prescriptive method permits few trade-offs or optimization procedures, but does permit several energy-effective and cost-effective alternate construction options to be used. See Figure 1.1-2.

1.3.2Use the System Performance method when more innovative design is required, or when the Prescriptive method does not provide the necessary design flexibility. It requires more manual calculations than the Prescriptive method. See Figure 1.1-2

1.3.3Use either of the Building Energy methods (Sections 11.0 or 12.0) when the most innovative design concepts are being considered. The Building Energy methods allow the trade-off of energy among the building systems as long as the total calculated design annual energy consumption does not exceed the limit prescribed. It will, in general, require the use of a computer program to simulate the operation of the various systems and to model building design energy use in accordance with the building loads and the proposed schedules of operation. See Figures 11-1 and 12-1.

EC04OC91.081