Wash. Admin. Code § 194-50-070

Current through Register Vol. 24-23, December 1, 2024

Section 194-50-070 - ASHRAE Standard 100, 2018-Section 7-Energy use analysis and target requirements

7.1 Building activity type and energy targets.

7.1.1Building 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.

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

7.2.1 For Tier 1 covered buildings the qualified person or for Tier 2 covered building the qualified energy manager shall determine the energy use intensity target (EUI_t) 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.

Note:

Buildings in participating campuses pursuing compliance through Normative Annex W, or at the connected building or campus-level shall determine the EUI_t as an area weighted aggregate of building-level EUI_t. Development of the EUI_t shall not include nontarget buildings.

Exceptions to 7.2.1:

1.Tier 2 covered buildings unable to develop EUI_t in accordance with Section 7.2.2 or 7.2.3 of this standard shall report Energy Star portfolio manager median site EUI.

2.EUI_t 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.

7.2.1.1Additional target for more recently built buildings: In addition to the requirements of section 7.2.1, more recently built buildings shall create a second EUI_t that is 15 percent less than the target developed for compliance with section 7.2.1. This shall be the building EUI_t and shall be included on Form B.

7.2.2 Energy targets for buildings with a single activity shall be calculated as follows:

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where (EUI_t₁) 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.

7.2.3 Energy targets 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:

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Exceptions to 7.2.3: The energy use intensity target (EUI_t) of a building may be modified using the following exceptions. These exceptions shall not be applied at the grouped building level. To develop the EUI for grouped buildings, apply the exceptions at the building-level, then calculate the weighted average EUI_t for the grouped buildings. None of these exceptions may be used to change the total gross floor area as it applies to Normative Annex Z, Section Z3.1 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 EUI_t as determined by the qualified person.

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 [SIGMA]A_nontarget comprise less than 10 percent of the building gross floor area A_gross and both:

a. Energy use of such space is metered separately.

b.Nontarget spaces comply with Sections 4.1 and 4.2.

The energy target 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 (A_gross-[SIGMA]A_nontarget). 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 building energy target calculations if the nontarget spaces total combined area [SIGMA]A_nontarget comprise less than 50 percent of the building gross floor area A_gross and both:

a. Energy use of such space is metered separately.

b.Nontarget spaces comply with Sections 4.1, 4.2, 4.3.1, and 4.3.3.

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

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

b.Nontarget buildings shall comply with Sections 4.1, 4.2, 4.3.1, and 4.3.3.

The energy target for the remaining grouped buildings shall be calculated after deducting the floor area of the nontarget buildings from the grouped building gross floor area (A_gross [SIGMA]A_nontarget).

7.2.4Energy targets for vacant and partially vacant buildings.

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.

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

7.2.4.2Vacant space - unconditioned: If the total floor area of a nonheated, noncooled, and nonilluminated vacant part of a building is smaller than 50 percent of the gross floor area, then it shall be excluded from the gross floor area, and the energy target shall be determined based on the remainder of the building 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, Z3.1 Compliance schedule.

7.2.4.3Vacant 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 target for the vacant space shall be determined based on Section 7.2.4.1.

Table 7-1 Building Activity Types/Activities

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

Table 7-2a Building Activity Site Energy Targets (EUI_t₁) (I-P Units)

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

Table 7-2a Building Activity Site Energy Targets (EUI_t₁) (SI Units) - Not adopted

Table 7-2b Building Activity Source Energy Targets (EUI_t₁) (I-P Units) - Not adopted

Table 7-2b Building Activity Source Energy Targets (EUI_t₁) (SI Units) - Not adopted

Table 7-2c Building Activity Electricity Site Energy Use Targets (ELUI_t₁) (I-P Units) - Not adopted

Table 7-2c Building Activity Electricity Site Energy Use Targets (ELUI_t₁) (SI Units) - Not adopted

Table 7-2d Building Activity Fossil Fuel Site Energy Use Targets (FEUI_t₁) (I-P Units) - Not adopted

Table 7-2d Building Activity Fossil Fuel Site Energy Use Targets (FEUI_t₁) (SI Units) - Not adopted

Table 7-3 Building Operating Shifts Normalization Factor

Table 7-3 adopted as modified in Section Z7

Table 7-4 Building Activity Type Definitions Table

Wash. Admin. Code § 194-50-070

Adopted by WSR 20-22-059, Filed 10/30/2020, effective 11/30/2020

Amended by WSR 24-03-033, Filed 1/8/2024, effective 2/8/2024

Amended by WSR 24-16-041, Filed 7/30/2024, effective 8/30/2024