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PDFWAC 51-11C-90500

Appendix FOutcome-based energy budget.

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.
F101.3.3 Maximum site energy budget. Table F101.3.2 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. 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.
F101.4 Actual energy use submittal. The building owner or representative shall submit energy use documentation summary from all energy source providers or from an energy benchmarking service to the building code official. Code compliance is achieved with net energy use below the energy budget for any continuous 12-month span within the first 3 years of occupancy.
F101.4.1 Energy use monitoring period and occupancy. The energy use monitoring time frame shall start on the first full-month billing cycle of the utility or energy source provider(s) 6 months after a certificate of occupancy is issued. Buildings shall be deemed substantially occupied when a minimum 85 percent of the floor area, including all common areas, is occupied. The energy monitoring start time may be delayed up to an additional 6 months from certificate of occupancy (up to 12 months total) if 85 percent occupancy is not yet achieved. Buildings not 85 percent occupied after 12 months shall start the monitoring period for the portions occupied with an energy budget based on the spaces occupied and all common areas combined.
F101.4.2 Change of occupancy use during monitoring period. If an area within the building changes from one occupancy use to another with a different target EUI energy budget or if the building occupancy level drops below 50 percent, the target EUI energy budget shall be recalculated to become the new energy budget against which the building energy use shall be compared for compliance.
F101.4.3 Energy metering. All building spaces and uses subject to an energy budget or a portion of the energy budget shall be metered separately for all energy uses.
F101.4.4 Energy budget responsibility. The building owner is responsible for the compliance of the whole building. At the building owner's discretion, responsibility for the energy use budget may be divided and transferred into portions attributable to the occupant, operator or controller of each energy budget space. Common area spaces not under the control of an occupant or tenant may not be transferred.
F101.5 Actual energy use above the energy budget. Buildings exceeding the energy budget are not in compliance with the energy code and the building owner shall complete one of the following measures within 1 year:
1. Owners of buildings with actual energy use that exceeds the energy budget by up to 20 percent may offset the excess energy amount through annual green power purchase agreement from the utility provider at a rate of 1.1 times the excess energy amount until future code compliance is demonstrated.
2. Owners of buildings with actual energy use that exceeds the energy budget by more than 20 percent and up to 40 percent shall complete item 1 and either install on-building, on-site, or off-site energy generation equipment or invest in an energy conservation retrofit using the performance bond or financial security for energy amount remaining above 20 percent.
3. Owners of buildings with actual energy use that exceeds the energy budget by more than 40 percent shall complete item 1, item 2, and post a replacement performance bond or financial security equal to the first bond or security amount.
F101.5.1 Continued energy monitoring. Upon completing the necessary compliance measure(s) in Section F101.5 the building owner is provided another 3-year time frame to achieve and document net energy use below the energy budget for any continuous 12-month span. Owners of buildings that remain more than 20 percent above the energy budget shall repeat the measures in Section F101.5, up to 3 times maximum, using the performance bond or financial security to install energy generation equipment or to install an energy retrofit and post a new performance bond equal to the first.
F101.5.2 Tradable certificate for energy savings. As an alternate to the requirements of Section F101.5 a building owner may, when this market-based instrument becomes available, purchase a Tradable Certificate for Energy Savings (TCES) or "white certificates" from a building or entity with energy savings. The building owner shall purchase TCES's equal to 1.1 times the amount that the building's actual energy use exceeds the energy budget.
F101.6 Performance bond or financial security. A building developer must secure and submit to the code official a performance bond or an irrevocable financial security letter of credit from a state of Washington financial institution prior to certificate of occupancy issuance. The bond or security shall have a value equal to $4.00 per square foot of gross conditioned floor area. The bond or security shall be used only to install renewable energy on the building or for investment into energy conservation measures as part of an energy retrofit. The bond or security may also be held for one additional 3-year energy-monitoring period if green power is purchased. Upon demonstrated compliance with the energy budget, the bond or security requirement shall be released.
F101.6.1 Failure to submit energy use data. Building owners that fail to submit energy use data at the end of the 3-year monitoring period shall forfeit the full amount of the performance bond or financial security as payment to the local jurisdiction. Building owners that fail to submit energy use data at the end of each continuing five-year monitoring period shall be fined an amount equal to the original bond or financial security by the local jurisdiction.
F101.7 Continued energy budget certification. After achieving code compliance buildings shall be required every 5 years to document a continuous 12-month span with net energy use that is lower than the required energy budget. Owners of buildings with actual energy use that is at least 2.5 percent below their energy budget (from year permitted baseline, not voluntary year) may sell, when a future market-based instrument becomes available, their unused energy equivalents in the form of a "white certificate" or Tradable Certificate for Energy Savings.
F101.8 Local amendments. Local jurisdictions may amend the current code cycle EUI maximum energy budget by adopting a more stringent future code year value stated in Table F101.3.2.
Table F101.3.2
Washington State Outcome-Based Energy Budget
Zone 4C:
 
Site EUI
Base
Current
Future
Building Occupancy/Use
ft2/year
2003
2018
2021
2024
2027
2030
A-3
 
 
 
 
 
 
 
Library
kWh
30.5
14.6
13.3
11.9
10.5
9.1
kBtu
104
49.9
45.3
40.6
35.9
31.2
B
 
 
 
 
 
 
 
Office/Bank
kWh
19.7
8.5
7.8
7.2
6.6
5.9
kBtu
67.3
28.9
26.7
24.5
22.4
20.2
Medical Office (nondiagnostic)
kWh
14.8
7.1
6.4
5.8
5.1
4.4
kBtu
50.4
24.2
21.9
19.6
17.4
15.1
E
 
 
 
 
 
 
 
School K-12
kWh
17.1
8.2
7.4
6.7
5.9
5.1
kBtu
58.4
28.0
25.4
22.8
20.2
17.5
1-2
 
 
 
 
 
 
 
Hospital (in-patient)
kWh
51.6
24.8
22.5
20.1
17.8
15.5
kBtu
176.1
84.5
76.6
68.7
60.8
52.8
M
 
 
 
 
 
 
 
Grocery/Food Market
kWh
66.6
32.0
29.0
26.0
23.0
20.0
kBtu
227.4
109.1
98.9
88.7
78.5
68.2
Retail
kWh
25.7
12.3
11.2
10.0
8.9
7.7
kBtu
87.5
42.0
38.1
34.1
30.2
26.3
S-1
 
 
 
 
 
 
 
Parking
 
 
 
 
 
 
 
Enclosed Garagea
kWh
3.8
2.3
2.0
1.7
1.4
1.1
kBtu
13.0
8.0
7.0
5.9
4.9
3.9
Open Garagea
kWh
2.3
1.4
1.2
1.0
0.9
0.7
kBtu
7.8
4.8
4.2
3.6
3.0
2.3
S-2
 
 
 
 
 
 
 
NonRefrigerated Distribution/Shippingb
kWh
8.6
4.1
3.7
3.3
3.0
2.6
kBtu
29.2
14.0
12.7
11.4
10.1
8.8
R-2 Multi-Family (3+ stories)
 
 
 
 
 
 
 
Lobby/Common Area
kWh
29.0
17.5
15.3
13.1
10.9
8.7
kBtu
99
59.7
52.2
44.7
37.2
29.7
Studio/Micro-unit
kWh
9238
3284
3156
3028
2900
2771
kBtu
31520
11205
10768
10331
9893
9456
One Bedroom
kWh
18476
6568
6312
6055
5799
5543
kBtu
63040
22411
21536
20661
19787
18912
Two Bedroom
kWh
27714
9852
9468
9083
8699
8314
kBtu
94560
33616
32304
30992
29680
28368
Three Bedroom
kWh
36952
13136
12624
12111
11598
11086
kBtu
126080
44821
43072
41323
39573
37824
Additional Bedroom
kWh
9238
3284
3156
3028
2900
2771
kBtu
31520
11205
10768
10331
9893
9456
All Occupancies/Use Types
2003
2018
2021
2024
2027
2030
 
U-Factor
Vertical Fenestration
 
 
 
 
 
 
Nonmetal
 
0.28
0.27
0.25
0.24
0.23
Metal - Fixed
 
0.33
0.31
0.28
0.26
0.23
Metal - Operable
 
0.34
0.32
0.29
0.26
0.23
Roof
 
0.016
0.015
0.014
0.013
0.012
Wall (above/below grade)
 
0.031
0.028
0.024
0.021
0.018
Floors
 
0.024
0.023
0.021
0.020
0.018
 
F-Value
Slab on Grade
 
0.41
0.39
0.36
0.34
0.32
 
CFM75/ft2
Air Leakage
 
0.25
0.17
0.14
0.11
0.08
Zone 5B:
 
Site EUI
Base
Current
Future
Building Occupancy/Use
ft2/year
2003
2018
2021
2024
2027
2030
A-3
 
 
 
 
 
 
 
Library
kWh
31.9
15.3
13.9
12.4
11.0
9.6
kBtu
108.8
52.2
47.3
42.4
37.5
32.6
B
 
 
 
 
 
 
 
Office/Bank
kWh
20.1
9.1
8.3
7.5
6.8
6.0
kBtu
68.6
30.9
28.3
25.8
23.2
20.6
Medical Office (nondiagnostic)
kWh
15.0
7.2
6.5
5.9
5.2
4.5
kBtu
51.3
24.6
22.3
20.0
17.7
15.4
E
 
 
 
 
 
 
 
School K-12
kWh
18.3
8.8
8.0
7.1
6.3
5.5
kBtu
62.4
30.0
27.2
24.3
21.5
18.7
1-2
 
 
 
 
 
 
 
Hospital (in-patient)
kWh
48.5
23.3
21.1
18.9
16.7
14.6
kBtu
165.5
79.4
72.0
64.5
57.1
49.7
M
 
 
 
 
 
 
 
Grocery/Food Market
kWh
66.3
31.8
28.8
25.8
22.9
19.9
kBtu
226.1
108.5
98.4
88.2
78.0
67.8
Retail
kWh
28.4
13.6
12.4
11.1
9.8
8.5
kBtu
97.0
46.6
42.2
37.8
33.5
29.1
S-1
 
 
 
 
 
 
 
Parking
 
 
 
 
 
 
 
Enclosed Garagea
kWh
3.8
2.3
2.0
1.7
1.4
1.1
kBtu
13.0
8.0
7.0
5.9
4.9
3.9
Open Garagea
kWh
2.3
1.4
1.2
1.0
0.9
0.7
kBtu
7.8
4.8
4.2
3.6
3.0
2.3
S-2
 
 
 
 
 
 
 
NonRefrigerated Distribution/Shippingb
kWh
10.5
5.0
4.6
4.1
3.6
3.1
kBtu
35.8
17.2
15.6
14.0
12.4
10.7
R-2 Multi-Family (3+ stories)
 
 
 
 
 
 
 
Lobby/Common Area
kWh
29.0
18.8
16.3
13.8
11.2
8.7
kBtu
99
64.2
55.6
46.9
38.3
29.7
Studio/Micro-unit
kWh
9238
3495
3314
3133
2952
2771
kBtu
31520
11925
11308
10691
10073
9456
One Bedroom
kWh
18476
6990
6628
6267
5905
5543
kBtu
63040
23851
22616
21381
20147
18912
Two Bedroom
kWh
27714
10485
9943
9400
8857
8314
kBtu
94560
35776
33924
32072
30220
28368
Three Bedroom
kWh
36952
13980
13257
12533
11809
11086
kBtu
126080
47701
45232
42763
40293
37824
Additional Bedroom
kWh
9238
3495
3314
3133
2952
2771
kBtu
31520
11925
11308
10691
10073
9456
All Occupancies/Use Types
2003
2018
2021
2024
2027
2030
 
U-Factor
Vertical Fenestration
 
 
 
 
 
 
Nonmetal
 
0.25
0.23
0.21
0.18
0.16
Metal - Fixed
 
0.31
0.27
0.23
0.20
0.16
Metal - Operable
 
0.32
0.28
0.24
0.20
0.16
Roof
 
0.016
0.015
0.014
0.013
0.012
Wall (above/below grade)
 
0.031
0.028
0.024
0.021
0.018
Floors
 
0.024
0.023
0.021
0.020
0.018
 
F-Value
Slab on Grade
 
0.41
0.39
0.36
0.34
0.32
 
CFM75/ft2
Air Leakage
 
0.25
0.17
0.14
0.11
0.08
aLighting power allowance must still comply with Table C405.4.2(2).
bApplicable to heated warehouses only.
FIGURE F101.3.2
Washington State Outcome-based Energy Budget Form
WASHINGTON STATE OUTCOME-BASED ENERGY BUDGET FORM
(reserved for graphics)
 
 
 
 
 
 
Building occupancy/use
 
 
 
 
 
 
 
 
 
 
 
Conditioned floor area SF
 
 
 
 
 
 
 
 
 
 
 
Code maximum site EUI energy budget
 
 
 
 
 
 
 
 
 
 
Predicted EUI
 
 
 
 
 
 
 
 
 
 
 
Electric
 
 
 
 
 
 
 
 
 
 
 
Gas
 
 
 
 
 
 
 
 
 
 
 
Propane
 
 
 
 
 
 
 
 
 
 
 
Oil
 
 
 
 
 
 
 
 
 
 
 
Other (source/generation)
 
 
 
 
 
 
 
 
 
 
 
Generation Potential EUI
 
 
 
 
 
 
 
 
 
 
Building Integral
 
(combined must exceed 40%)
 
 
 
 
 
 
 
 
On-site
 
 
 
 
 
 
 
 
 
 
 
Off-site
 
(max 40%)
 
 
 
 
 
 
 
 
 
Purchase
 
(max 40%)
 
 
 
 
 
 
 
 
 
Percentage better than energy budget
 
 
 
 
 
 
 
 
 
 
Percentage potential EUI above predicted EUI
 
 
 
 
 
 
 
 
 
PROJECT SUMMARY
 
 
 
 
 
Building Name
 
 
 
 
 
Address
 
 
 
 
 
City
 
 
 
 
 
Owner
 
 
 
 
 
Address
 
 
 
 
 
City, State, Zip
 
 
 
 
 
PROJECT CERTIFICATION
 
 
 
 
Name
 
 
 
 
 
Firm
 
 
 
 
 
Date
 
 
 
 
(seal)
[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapter 19.27 RCW. WSR 19-24-040, § 51-11C-90500, filed 11/26/19, effective 7/1/20.]
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