Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-90500 - Appendix F-Outcome-based energy budget

Current through Register Vol. 24-14, July 15, 2024
Informational Note:
The provisions
				contained in this appendix are not mandatory unless specifically referenced in
				the adopting ordinance.
F101.1
General.
This section is
			 an outcome-based energy budget compliance requirement pursuant to
			 RCW
			   19.27A.160 to incrementally move toward
			 achieving by 2031 a 70 percent reduction in annual net energy use compared with
			 2006 baseline. As an outcome-based energy budget, this requirement uses a
			 building's actual energy use to determine compliance.
F101.2
Scope.
Buildings
			 permitted under this section shall document one year of net energy use below an
			 energy budget within 3 years after occupancy and every 5 years thereafter.
			 Buildings and sites shall also be designed with the ability to offset in the
			 future all estimated energy needs through renewable energy generation with
			 minimum 40 percent on-site, maximum 40 percent off-site, and maximum 20 percent
			 through green power purchase. Buildings that exceed the energy budget by up to
			 20 percent shall offset the excess amount through a green power purchase
			 agreement. Buildings that exceed the energy budget by more than 20 percent
			 shall, using a posted performance bond or financial security, offset the excess
			 amount over 20 percent by installing renewable energy or with an energy
			 retrofit.
F101.3
Building
			 permit submittal.
Building designs shall establish on the Washington
			 State Outcome-Based Energy Budget form (Figure F101.3):
1. The anticipated building energy use is
			 lower than the energy budget.
2.
			 The energy generation ability in the future is greater than or equal to the
			 anticipated building energy use.
F101.3.1
Anticipated building energy
			 use.
The total yearly energy use from all metered fuel sources is the
			 anticipated building energy use. Any energy used from district energy, combined
			 heat and power, renewable energy, or captured waste heat systems must be
			 metered. Buildings with any nonmetered energy sources are not permitted for
			 compliance with this section. All secondary spaces and services (examples:
			 Exterior building and site lighting, surface parking, garages, and exterior
			 swimming pools) associated with the building shall be included in the overall
			 energy use total. The anticipated site Energy Use Intensity (EUI) for each fuel
			 source shall be reported in units of kWh/ft2/yr or
			 kBtu/ft2/yr using the conversions listed below:
Metered Fuel Source
to kWh:
to kBTU:
Electric
kWh × 1
kWh × 3.412
Gas
Therm × 29.308
Therm × 100
Propane
Cubic Foot × 0.738
Cubic Foot × 2.5185
Fuel Oil
Gallon × 43.872
Gallon × 149.6905
F101.3.2
Building use and occupancy
			 types.
Building use and occupancy types permitted are indicated in Table
			 F101.3.2(1).
F101.3.3
Maximum
			 site energy budget.
Table F101.3.2(1) indicates the site EUI budget for
			 each building use and occupancy type along with the building enclosure
			 requirements for all use and occupancy types.
F101.3.3.1
Mixed-use buildings.
For buildings that contain more than one building use or occupancy type, the
			 overall energy budget shall be based on the individual floor area percentage
			 totals of each use times the individual energy budget and summing the results
			 of all individual areas.
F101.3.3.2
Energy budget level options.
Development teams may commit to a
			 future, more stringent energy budget level from Table F101.3.2(1). Actual
			 energy use and energy generation ability will be evaluated on this lower budget
			 level.
F101.3.3.3
Energy
			 modeling.
A proposed building energy model is required for compliance
			 with Section F101.3.2. A baseline energy model is not required. The proposed
			 design model must show estimated energy use below the
			 energy.
F101.3.4
Energy generation ability.
Permit documents shall indicate the
			 location, space allocated, and connection pathways for future installation of
			 all potential energy generation systems. Only items defined by the Washington
			 State Energy Code as on-site renewable energy shall be used to meet energy
			 generation requirements.
F101.3.4.1
Energy generation categories.
The development team shall complete
			 the Washington State Outcome-Based Energy Budget form (Figure F101.3) to show
			 the total renewable energy generation ability in the following categories:
1. Building integral: Renewable energy
			 generation sources attached to the building. This value, combined with the
			 on-site value, shall be at least 40 percent of the energy budget.
2. On-site: Renewable energy generation
			 sources located on the building site property. This value, combined with the
			 building integral value, shall be at least 40 percent of the energy
			 budget.
3. Off-site: Renewable
			 energy generation sources not located on the building site. This amount is
			 limited to 40 percent of the energy budget. A specific off-site location does
			 not need to be identified.
4. Green
			 Power: Renewable energy purchased through the electric utility provider for the
			 building. This amount is limited to 20 percent of the energy
			 budget.
F101.3.4.2
Energy generation ability for building sites within a 2030
			 District.
The development team for building sites within a designated
			 2030 District recognized by Architecture 2030 may use the Architecture 2030
			 Challenge 70 percent energy reduction target from the 2003 baseline as the
			 energy budget. Building locations meeting this criteria and choosing this
			 energy budget are exempt from the building integral and on-site requirements in
			 Section F101.3.4.1. Green power remains capped at 20 percent. The generation
			 requirements may be split, in any amount, among the building integral, on-site,
			 or off-site categories. Actual energy use will be evaluated against the
			 Architecture 2030 Challenge 70 percent energy reduction
			 budget.