REVIEWED BLD2024-0353+Energy_Calculations+3.13.2024_4.11.56_PM+4129068BLD2024-0353
RECEIVED
Mar 14 2024
Alterations Worksheet - 2018 Washington State Energy Code
Project Information Contact Information
SCHULER RESIDENCE AL Cohen, architect
735 Caspers St 330 Dayton St # 6
Edmonds WA 98020 Edmonds WA 98020
The WSEC requirements for alterations are located in Chapter 5 of the code text.
Alterations (remodels) do not need to obtain energy credits from Table R406.3
Additions must meet the requirements for new construction. This includes nonconditioned space
being altered to become conditioned space.
Will the wall cavities be exposed? /s No
If yes: Exposed wall cavities must be insulated -
2 X 4 wall studs require R-15 insulation
2 X 6 wall studs require R-21 insulation
REVIEWED
BY
CITY OF EDMONDS
Will the roof/ceiling framing cavities or attic be exposed? Yes No
If yes: Exposed roof/ceiling assemblies must be insulated -
Vaulted ceilings: Insulate to the full depth of the framing member
while allowing for the minimum 1" ventilated space
Flat ceilings: Install R-49 insulation or what the attic space can
accommodate based on the roof pitch
Will the floor framing cavities be exposed? r/Yes No
If yes: Exposed floor cavities must be insulated to R-30
Are the windows and/or doors being replaced? V<"s No
(includes both window or door and frames)
If yes: New windows and doors must have an area weighted average U-factor of <_0.30
Will the heating or cooling system be replaced? /s No
If yes: New equipment must meet current requirements and
ducts need to be tested
Will the hot water system be altered? V�es No
If yes: New water heating equipment must meet current code requirements
Are more than 50% of the light fixtures being changed? + es No
If yes: 75% of all lamps must be high efficacy
(LED or CFL)
R503.1.1 Building envelope. Building envelope assemblies that are part of the alteration shall comply with Section
R402.1.1 or R402.1.4, Sections R402.2.1 through R402.2.11, R402.3.1, R402.3.2, R402.4.3 and R402.4.4.
Exception: The following alterations need not comply with the requirements for new construction provided
the energy use of the building is not increased:
1. Storm windows installed over existing fenestration.
2. Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are
filled with insulation. 2x4 framed walls shall be insulated to a minimum of R-15 and 2x6 framed walls shall
be insulated to a minimum of R-21.
3. Construction where the existing roof, wall or floor cavity is not exposed.
4. Roof recover.
5. Roofs without insulation in the cavity and where the sheathing or insulation is exposed during
reroofing shall be insulated either above or below the sheathing.
6. Surface -applied window film installed on existing single pane fenestration assemblies to reduce solar
heat gain provided the code does not require the glazing fenestration to be replaced.
R503.1.1.1 Replacement fenestration. Where some or all of an existing fenestration unit is replaced with a new
fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable
requirements for U-factor and SHGC in Table R402.1.1. Where more than one replacement fenestration unit is being
installed, an area -weighted average of the U-factor and SHGC of all replacement fenestration shall be permitted to be
used to demonstrate compliance.
R503.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of the
alteration shall comply with Section R403.
Exceptions:
1. Where ducts from an existing heating and cooling system are extended, duct systems with less than 40 linear feet in
unconditioned spaces shall not be required to be tested in accordance with Section R403.2.2.
2. Existing duct systems constructed, insulated or sealed with asbestos.
R502.1.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of the addition shall
comply with Section R403.
Exception: The following need not comply with the testing requirements of Section R403.3.3
1. Additions of less than 750 square feet.
2. Duct systems that are documented to have been previously sealed as confirmed through field
verification and diagnostic testing in accordance with procedures in WSU RS-33.
3. Ducts with less than 40 linear feet in unconditioned spaces.
4. Existing duct systems constructed, insulated or sealed with asbestos.
R503.1.3 Service hot water systems. New service hot water systems that are part of the alteration shall comply with
Section R403.5.
R503.1.4 Lighting. New lighting systems that are part of the alteration shall comply with Section R404.1.
Exception: Alterations that replace less than 50 percent of the luminaires in a space, provided that such
alterations do not increase the installed interior lighting power.
R503.2 Change in space conditioning. Any nonconditioned or low -energy space that is altered to become conditioned
space shall be required to be brought into full compliance with this code.
2018 Washington State Energy Code Residential
Prescriptive Code Compliance forAJ|Climate Zones inWashington
,Single Family — New & Additions (effective February 1, 2021)
These requirements apply toall |RCbuilding types, including detached one- and two-family
dwellings and multiple single-family dwellings (tpmnnhouses).
_ _..... .......... .... �� _ _�.... ...... ................ .......
Project Information Contact InfoLVation,
Instructions: This single-family will use the requirements ofthe Prescriptive Path below and
incorporate the minimum values listed. Based on the size of the structure, the appropriate number of
additional credits are checked aschosen bythe permit applicant.
Provide all information from the following tables as building permit drawings: Table R402.1 - Insulation and
Fenestration Requirements by Component, Table R406.2 - Fuel Normalization Credits and 406.3 - Energy Credits.
Authorized Representative Date �F
SkYightu-Factox
GlazedFenestration
b,,
Ceiling e
All Climate Zones (Table R402.1
n/a
49
Z1int
____
'R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavitythat is less
a ;than the label or design thickness of the insulation, the compressed R-value of the insulation from Appendix
Jable A101.4 shall not be less than the R-value specified in the table.
b 'The fenestration U-factor column excludes skylights.
"10/15/21 +5713" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insulation on
the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at
c the interior of the basement wall. "10/15/21 +STB" shall be permitted to be met with R-13 cavity insulation on
the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "5TB"
means R-5 thermal break between floor slab and basement wall.
d R-10 continuous insulation is required under heated slab on grade floors. See Section R402.2.9.1. . .... ... ..
For single rafter- or joist -vaulted ceilings, the insulation may be reduced to R-38 if the full insulation depth
extends over the top plate of the exterior wall.
R-7.5 continuous insulation installed over an existing slab I$ deemed to be equivalent to the required perimeter
f slab insulation when applied to existing slabs complying with Section R503.1.1. If foam plastic is used, it shall
meet the requirements for thermal barriers protecting foa.m.-pl.astic.s., . ................. ...........
For log structures developed in compliance with Standard [CC 400, log walls shall meet the requirements for
Int. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including standard
h 'framing 16 inches on center, 78% of the wall cavity insulated and headers insulated with a minimum of R-10
Prescriptive Path —Single Family 2018Wasmngton State Energy Cocle-Ft
2018 Washington State Energy Code - Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family - New'& Additions (effective February 1, 2021)
Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 (fuel
normalization credits) and Table 406.3 (energy credits) to achieve the following minimum number of
credits. To claim this credit, the building permit drawings shall specify the option selected and the
maximum tested building air leakage, and show the qualifying ventilation system and its control sequence
of operation.
1. Small Dwelling Unit: 3 credits
Dwelling units less than 1,500 sf in conditioned floor area with less than 300 sf of fenestration area.
Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf.
2. Medium Dwelling Unit: 6 credits
All dwelling units that are not included in #1 or #3
3. Large Dwelling Unit: 7 credits
Dwelling units exceeding 5,000 sf of conditioned floor area
4. Additions less than 500 square feet: 1.5 credits
All other additions shall meet 1-3 above
Before selecting your credits on this Summary table, review the details in Table 406.3 (Single Family), on page 4.
Summary of Table R406.2
Heating 1
Fuel Normalization Descriptions
Credits- select ONE I
User Notes
heating option
`Options`
1 )Combustion heating minimum NAECAe
- _.0 0
.....
2 I Heat pump'
I.........
10
_
❑ 11
_. ....... ........ ............... .... .._.__.,.........---
3 Electric resistance heat only - furnace or zonal
( --I ---- -- --
1.0 )
-- I-
❑
-
' 4 j DHP with zonal electric resistance per option 3.4
0.5
!
❑
...... _ .._.... ._
5 �AII other heating systems
10
I
❑
_..... _.._...
Energy
_.•_-..
Credits - select
ONE ,
(Options c, Energy Credit Option Descriptions
- - . _
energy option from
category
each
_... ..::.._.......
(Efficient Building Envelope
0._5
❑
_._.._1.1... ... ...._ _...... _ . _
1.2 Efficient Building Envelope
_
10
_.....
❑
1 3 Efficient Building Envelope
1_.....
0 5
..._..._ .. _ ._. __.
14 l Efficient Building Envelope
10
❑
l.. .. ......_ . ..._..........__._...__............ ..._...._._.
I 15 1 Efficient Building Envelope
....
2 0
%
❑
........... .... ................._..........................................._._
1.6 Efficient Building Envelope
- 3_0 -_�_
t
❑
1.7 Efficient Building Envelope_-
0.5
❑
2.1 Air Leakage Control and Efficient Ventilation
0.5
❑
2.2
Air Leakage Control and Efficient Ventilation
..
10
LJ
2.3
Air Leakage Control and Efficient Ventilation
.. ....... _
15
❑
2.4
Air Leakage Control and Efficient Ventilatio.2.0.................
�..3.1.....I.High
Efficiency HVAC........ _.._ ........ _ .........__........................................._........................
1. �....
0 ..
j 3.2
High Efficiency HVAC
1.0
❑
3.3a
f......_
High Efficiency HVAC ....... .... .. _._ .._ .._
1.5 ......
❑
_ ..... ....-_
3.4
High Efficiency HVAC - _ _ _
_ 1.5 -_
❑
_
3.5
_1 High Efficiency HVAC _
1.5
_.
❑
1 3.6a
! High Efficiency HVAC
2.0
❑ ___
4.2 !High Efficiency HVAC Distribution System 0 5 ❑
g y y _..._....
41 High Efficiency HVAC Distribution System
1.0 ❑
Prescriptive Path - Single Family 2018 Washington State Energy Code-R
2
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family - New & Additions (effective February 1, 2021) `
... _ .... . .. _ _......
Summary of Table R406.2 (cont.)
' Energy
Energy Credit Option Descriptions (cont.)
Options; _
Credits - select ONE
energy option from
each cate o a
User Notes
' S ld Efficient Water Heating
0.5 ❑
( 5 2 'Efficient Water Heating
0.5 ❑
... .....
5 3 Efficient Water Heating
1 0 i
................................
5.4 Efficient Water Heating
1.5 i ❑
........ _...................................
5.5 Efficient Water Heating
2 0 ❑
_ ......... ......... .................
! 5 6 Efficient Water Heating
... . ,._....... _ ..
61e Renewable Electric Energy (3 credits max)
_
2.5 i ❑
1.0 I Q
7.1 LAppliance Package
0.5 ❑
—
Total Credits
-- —
�CLEAR FORM
.
a. An alternative heating source sized at a maximum of 0.5 W/sf (equivalent) of heated floor area or 500 W,
whichever is bigger, may be installed in the dwelling unit.
b. Equipment listed in Table C403.3.2(4) or C403.3.2(5)
c. Equipment listed in Table C403.3.2(1) or C403.3.2(2)
d. You cannot select more than one option from any category EXCEPT in category S. Option 5.1 may be combined
with options 5.2 through 5.6. See Table 406.3.
e. 1.0 credit for each 1,200 kWh of electrical generation provided annually, up to 3 credits max.
See the complete Table R406.2 for all requirements and option descriptions.
Please print only pages 1 through 3 of this worksheet for submission to your building official.
Prescriptive Path - Single Family 2018 Washington State Energy Code-R 3