CFR > Title 10 - Energy > CHAPTER II—DEPARTMENT OF ENERGY > SUBCHAPTER D—ENERGY CONSERVATION (parts 400 to 491) > PART 434—ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS > SUBPART E—Building Energy Cost Compliance Alternative (§434.501 to §434.521) > 434.508—Determination of the design energy consumption and design energy cost.

434.508—Determination of the design energy consumption and design energy cost.

508.1The Design Energy Consumption shall be calculated by modeling the Proposed Design using the same methods, assumptions, climate data, and simulation tool as were used to establish the Energy Cost Budget, except as explicitly stated in 509 through 534. The Design Energy Cost shall be calculated per Equation 508.1.
Based on:

Code of Federal Regulations

DECOSm = DECONml × ECOSml . . . DECONmi × ECOSmi(Equation 508.1.2)
Where:
DECOS = The annual Design Energy Cost
DECOSm = The monthly Design Energy Cost
DECONmi = The monthly Design Energy Consumption of the ith type of energy
ECOSmi = The monthly Energy Cost per unit of the ith type of energy
The DECONmi shall be calculated from the first day through the last day of the month, inclusive.