3.4.1 General Information

Classification

Applicability

When building space type uses are known and can be delineated within the building area

Definition

Space-by-space classification is one of two available classification methods for identifying the function of the building, which for most purposes determines certain energy-related requirements for the baseline and create defaults for the proposed building design. See Appendix B for a list of the building types and space types that may be selected.

The building or space type determines the following default information:

  • Number of occupants (occupant density)       
  • Equipment power density      
  • Lighting power density
  • Hot water load
  • Ventilation rate
  • Gas and electric process power
  • Schedules

Units

List: See the tables in Appendix B. If the building activity is specified by the whole building method, then this input is not applicable.

Input Restrictions

The space-by-space method is restricted to the common space types defined in Section 9 of ASHRAE 90.1 and listed in Appendix B. Detailed information about each space must be known in order for the space-by-space method to be used over the whole building method. Either method may be used, but the two may not be mixed within a single rating.

Baseline Rules

The baseline building shall have a corresponding space type for each one in the proposed design and the classifications shall be the same.

 

Floor Area

Applicability

All projects that use the space-by-space classification method (see above)

Definition

The floor area of the space. The area of the spaces that make up a thermal block shall sum to the floor area of the thermal block.

Units

Square feet (ft²)

Input Restrictions

Area shall be measured to the outside of exterior walls and to the center line of partitions.

Baseline Rules

Area shall be identical to the proposed design.