WAC 194-50-070

7.1.1 Building activity type.Buildings are divided into activity types as shown in Table 7-1 Normative Annex Z. Building activity types are defined by the AHJ in Table 7-4.

7.1.2 Energy targets.Energy targets for each building activity type are listed in Table 7.2a, Normative Annex Z. These energy targets will be periodically reevaluated and may be modified for future compliance cycles.

7.1.3 Building operating shifts normalization factors.Building operating shifts normalization factors for each building activity type are listed in Table 7-3, Normative Annex Z.

7.2.1Determining energy use intensity target (EUIt).Tier 1 covered buildings the qualified person or Tier 2 covered building the qualified energy manager shall determine the energy use intensity target (EUIt) according to Section 7.2.2 for single-type/activity buildings and Section 7.2.3 for mixed-use buildings, and shall complete Form B.

7.2.1.1 Energy use intensity target (EUIt). The energy use intensity target (EUIt) shall be determined according to Section 7.2.2 for single-type/activity buildings and Section 7.2.3 for mixed-use buildings, and submitted on Form B.

1. Covered buildings unable to develop EUIt in accordance with Section 7.2.2 or 7.2.3 of this standard shall report Energy Star portfolio manager national median site EUI.

2. EUIt programs developed and implemented by the building's local government and approved as equivalent or more stringent by the AHJ may be used as an alternative to the requirement in Section 7.2.1.1.

7.2.1.2 Additional target for more recently built buildings: The EUIt values for a more recently built building (or addition), calculated in accordance with Section 7.2.1, shall be reduced by 15 percent for all floor area meeting the definition of more recently built buildings. This shall be the building EUIt and shall be included on Form B.

7.2.2Single building activity type.Energy use intensity targets (EUIt) for buildings with a single activity shall be calculated as follows:

where (EUIt1) is the building activity energy target value in Table 7-2a for the appropriate building activities/types and climate, and S is the building operating shifts normalization factor in Table 7-3.

7.2.3Mixed-use building activity type.Energy use intensity targets (EUIt) for buildings with multiple activities shall be determined using weighted averages of building activity energy target for each area with a single activity, per the following equation, and reported on Normative Annex C Form B:

Exceptions to 7.2.3: The energy use intensity target (EUIt) of a building may be modified using the following exceptions. These exceptions shall not be applied at the grouped building level. To develop the EUIt for grouped buildings, apply the exceptions at the building-level, then calculate the weighted average EUIt for the grouped buildings. None of these exceptions may be used to change the total gross floor area or the building tier designation as it applies to Tier 1 covered buildings in Section Z3.2 Compliance schedule or Tier 2 covered building in Y3.2 Compliance schedule.

1. Majority of building is single-use: Spaces where more than 75 percent of the gross floor area has a single building activity type listed in Table 7-1 shall be reported as a single-use building or as a multiuse building in accordance with either Section 7.2.2 or Section 7.2.3.

2. Similar building activity types: Spaces less than 10 percent of the gross floor area with building activity type listed in Table 7-1 can combine their floor area with the floor area within the building that has a similar building activity type and similar EUIt as determined by the qualified person (or Tier 2 covered buildings, the qualified energy manager).

3. Nontarget spaces 10 percent:Nontarget spaces in buildings with multiple activities can be excluded from building energy target calculations if the nontarget spaces total combined area ΣAnontarget comprise less than 10 percent of the building gross floor area Agross and both:

a. Energy use of such space is metered separately.

b. Nontarget spaces comply with Section 4.1 Building type requirements and Section 4.2 Energy management plan and operations and maintenance program.

The EUIt for the remaining part of the building shall be calculated after deducting the floor area of the nontarget spaces from the building gross floor area (Agross-ΣAnontarget). Nontarget spaces shall be limited to the floor area occupied by the nontarget activity and shall not include supporting spaces such as corridors, common areas or other building activity types listed in Table 7-1.

4. Nontarget spaces 50 percent:Nontarget spaces in buildings with multiple activities can be excluded from buildingEUIt calculations if the nontarget spaces total combined area ΣAnontarget comprise less than 50 percent of the building gross floor area Agross and both:

a. Energy use of such space is metered separately.

b. Nontarget spaces comply with Section 4.1 Building type requirements, Section 4.2 Energy management plan and operations and maintenance program, Section 4.3.1.1 Measured energy use intensity (EUI), and one of the following: Section 4.3.3 Investment criteria, Section 4.3.4 Minimum energy use reduction, or Section 4.3.5 Space heating electrification.

The EUIt for the remaining part of the building shall be calculated after deducting the floor area of the nontarget spaces from the building gross floor area (Agross-ΣAnontarget). Nontarget spaces shall be limited to the floor area occupied by the nontarget activity and shall not include supporting spaces such as corridors, common areas or other building activity types listed in Table 7-1.

5. Nontarget buildings in grouped buildings:Nontarget buildings within grouped buildings shall:

a. Be metered separately and not included in the EUIt development.

b. Nontarget buildings shall comply with Section 4.1 Building type requirements, Section 4.2 Energy management plan and operations and maintenance program, Section 4.3.1.1 Measured energy use intensity (EUI), and one of the following: Section 4.3.3 Investment criteria, Section 4.3.4 Minimum energy use reduction, or Section 4.3.5 Space heating electrification. Or separately from the group, the nontarget building may comply through exemption, in accordance with Section Z4.1 Documentation of compliance through exemption, as applicable.

The EUIt for the remaining grouped buildings shall be calculated after deducting the floor area of the nontarget buildings from the grouped building gross floor area (Agross ΣAnontarget).

Exception to 7.2.4 Vacant and partially vacant buildings: If the building did not have physical occupancy by owner or tenant for at least 50 percent of the conditioned floor area throughout the consecutive 12-month period prior to the building compliance date, the building owner may apply for an exemption as specified in Normative Annex Z.

7.2.4.1 Vacant space - use unchanged: The energy use intensity target (EUIt) for vacant spaces shall be based on its prevacancy building activity type energy target if the intended use of the building will be unchanged.

7.2.4.2 Vacant space - unconditioned: The total floor area of a nonheated, noncooled, and nonilluminated vacant part of a building shall be excluded from the gross floor area in the EUIt calculation. The EUIt is based on the building activity type of the remaining square footage as described in Section 7.2.3. This allowance may not be used to change the total gross floor area as it applies to Normative Annex Z, Section Z3.2 Compliance schedule.

7.2.4.3 Vacant space - conditioned: If the vacant part of a building is heated and/or cooled, and the building energy use data for a consecutive 12-month period when the building was occupied within two years prior to the compliance date is not available, the vacant space shall be included in the gross floor area, and the energy use intensity target (EUIt) for the vacant space shall be determined based on Section 7.2.4.1.

Table 7-1 adopted as modified and published in Section Z7

Table 7-2a adopted as modified and published in Section Z7

Table 7-2a Building Activity Site Energy Targets (EUIt1) (SI Units) - Not adopted

Table 7-2b Building Activity Source Energy Targets (EUIt1) (I-P Units) - Not adopted

Table 7-2b Building Activity Source Energy Targets (EUIt1) (SI Units) - Not adopted

Table 7-2c Building Activity Electricity Site Energy Use Targets (ELUIt1) (I-P Units) - Not adopted

Table 7-2c Building Activity Electricity Site Energy Use Targets (ELUIt1) (SI Units) - Not adopted

Table 7-2d Building Activity Fossil Fuel Site Energy Use Targets (FEUIt1) (I-P Units) - Not adopted

Table 7-2d Building Activity Fossil Fuel Site Energy Use Targets (FEUIt1) (SI Units) - Not adopted

Table 7-3 adopted as modified in Section Z7