[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: 10CFR434.518]

[Page 407]
 
                            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 E_Building Energy Cost Compliance Alternative
 
Sec. 434.518  Service water heating.

    518.1 The service water loads for Prototype and Reference Buildings 
are defined in terms of Btu/h per person in Table 518.1.1, Service Hot 
Water Quantities. The service water heating loads from Table 518.1.1 are 
prescribed assumptions for multi-family high-rise residential buildings 
and default assumptions for all other buildings. The same service water 
heating load assumptions shall be made in calculating Design Energy 
Consumption as were used in calculating the Energy Cost Budget.

               Table 518.1.1--Service Hot water Quantities
------------------------------------------------------------------------
                                                             Btu/person-
                       Building type                           hour\1\
------------------------------------------------------------------------
Assembly...................................................          215
Office.....................................................          175
Retail.....................................................          135
Warehouse..................................................          225
School.....................................................          215
Hotel/Motel................................................         1110
Restaurant.................................................          390
Health.....................................................          135
Multi-family High Rise Residential.........................    \2\ 1700
------------------------------------------------------------------------
\1\ This value is the number to be multiplied by the percentage
  multipliers of the Building Profile Schedules in Table 513.2.b. See
  Table 513.2.a for occupancy levels.
\2\ Total hot water use per dwelling unit for each hour shall be 3,400
  Btu/h times the multi-family high rise residential building SWH system
  multiplier from Table 513.2.b.

    518.2 The service water heating system, including piping losses for 
the Prototype Building, shall be modeled using the methods of the RS-47 
(incorporated by reference, see Sec. 434.701) using a system that meets 
all requirements of subsection 404. The service water heating equipment 
for the Prototype or Reference Building shall be either an electric heat 
pump or natural gas, or if natural gas is not available at the site, 
2 fuel oil. Exception: If electric resistance service water 
heating is preferable to an electric heat pump when analyzed according 
to the criteria of Sec. 434.404.1.4 or when service water temperatures 
exceeding 145[deg]F are required for a particular application, electric 
resistance water heating may be used.