OLD REVIEWED BLD BLD2021-0370+Energy_Calculations+3.12.2021_1.33.49_PM+20903552018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family — New & Additions (effective February 1, 2021)
These requirements apply to all IRC building types, including detached one- and two-family
dwellings and multiple single-family dwellings (townhouses).
Project Information Contact Information
Gary Residence Addition �,Jinny Park
855 Dayton St, Edmonds inn arkarch mail.com
Instructions: This single-family project will use the requirements of the Prescriptive Path below and
incorporate the minimum values listed. Based on the size of the structure, the appropriate number of
additional credits are checked as chosen by the 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
All Climate Zones (Table R402.1.1)
Date 01 /29/2021
R-Value a
U-Factor a
Fenestration U-Factor b
n/a
0.30
Skylight U-Factor b
n/a
0.50
n/a
n/a
Glazed Fenestration SHGC b,e
49 i
0.026
Ceiling e
Wood Frame Wall g,h
21 int
0.056
Floor
30
0.029
Below Grade Wall qh
10/15/21 int + TB
0.042
Slab d,f R-Value & Depth
10, 2 ft
n/a
R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity that is less
a
than the label or design thickness of the insulation, the compressed R-value of the insulation from Appendix
Table A101.4 shall not be less than the R-value specified in the table.
The fenestration U-factor column excludes skylights.
b
"10/15/21 +5TB" 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 +5TB" 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
e
extends over the top plate of the exterior wall.
R-7.5 continuous insulation installed over an existing slab is 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 foam plastics.
For log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for
g
climate zone 5 of ICC 400.
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
insulation.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
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: ) 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: o 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 Credits - select ONE
O tions Fuel Normalization Descriptions heating option User Notes
P
1
Combustion heating minimum NAECAb
0.0
❑
2
Heat pump`
1.0
0
3
Electric resistance heat only - furnace or zonal
-1.0
❑
4
DHP with zonal electric resistance per option 3.4
0.5
❑
5
All other heating systems
Energy Credit Option Descriptions
-1.0
Credits - select
energy option
category
❑
ONE
from each
Energy
Options
p
1.1
Efficient Building Envelope
0.5
0
1.2
Efficient Building Envelope
1.0
0
1.3
Efficient Building Envelope
0.5
G)
1.4
Efficient Building Envelope
1.0
0
1.5
Efficient Building Envelope
2.0
0
1.6
Efficient Building Envelope
3.0
0
1.7
Efficient Building Envelope
0.5
0
2.1
Air Leakage Control and Efficient Ventilation
0.5
0
2.2
Air Leakage Control and Efficient Ventilation
1.0
0
2.3
Air Leakage Control and Efficient Ventilation
1.5
0
2.4
Air Leakage Control and Efficient Ventilation
2.0
0
3. la
High Efficiency HVAC
1.0
0
3.2
High Efficiency HVAC
1.0
0
3.3a
High Efficiency HVAC
1.5
0
3.4
High Efficiency HVAC
1.5
0
3.5
High Efficiency HVAC
1.5
G)
3.6a
High Efficiency HVAC
2.0
0
4.1
High Efficiency HVAC Distribution System
0.5
0
4.2
High Efficiency HVAC Distribution System
1.0
0
Prescriptive Path - Single Family 2018 Washington State Energy Code-R
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single FamilX— New & Additions (effective February 1, 2021)
Summary of Table
R406.2 (cont.)
Energy
Credits - select ONE
Options
Energy Credit Option Descriptions (cont.)
energy option from User Notes
d
each category
5.1d
Efficient Water Heating
0.5 ❑
5.2
Efficient Water Heating
0.5 0
5.3
Efficient Water Heating
1.0 0
5.4
Efficient Water Heating
1.5 0
5.5
Efficient Water Heating
2.0
5.6
Efficient Water Heating
2.5
0
6.1e
Renewable Electric Energy (3 credits max)
1.0
Q
7.1
Appliance Package
0.5
0
Total Credits
16-01
1 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.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R 3
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family— New & Additions (effective February 1, 2021)
Table 406.3 — Ene
Credits
I Credits: SF
1. EFFICIENT BUILDING ENVELOPE OPTIONS
Only one option from Items 1.1 through 1.7 may be selected in this category.
Compliance with the conductive UA targets is demonstrated using Section R402.1.4, Total UA alternative, where [1-
(Proposed UA/Target UA)] > the required %UA reduction.
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
1.1 0.5
Vertical fenestration U = 0.24
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
1.2 1.0
Vertical fenestration U = 0.20
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
Vertical fenestration U = 0.28
Floor R-38
1.3 Slab on grade R-10 perimeter and under entire slab below grade slab R-10 perimeter and 0.5
under entire slab or
Compliance based on Section R402.1.4: Reduce the Total conductive UA by 5%
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
Vertical fenestration U = 0.25
Wall R-21 plus R-4 ci
Floor R-38
1.4 Basement wall R-21 int plus R-5 ci 1.0
Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and
under entire slab or
Compliance based on Section R402.1.4: Reduce the Total conductive UA by 15%
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
Vertical fenestration U = 0.22
Ceiling and single -rafter or joist -vaulted R-49 advanced
Wood frame wall R-21 int plus R-12 ci Floor R-38
1.5 Basement wall R-21 int plus R-12 ci 2.0
Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and
under entire slab or
Compliance based on Section R402.1.4: Reduce the Total conductive UA by 30%
Prescriptive compliance is based on Table R402.1.1 with the following modifications:
Vertical fenestration U = 0.18
Ceiling and single -rafter or joist -vaulted R-60 advanced
Wood frame wall R-21 int plus R-16 ci
1.6 Floor R-48
Basement wall R-21 int plus R-16 ci
Slab on grade R-20 perimeter and under entire slab Below grade slab R-20 perimeter and
under entire slab or
Compliance based on Section R402.1.4: Reduce the Total conductive UA by 40%.
3.0
Advanced framing and raised heel trusses or rafters
Vertical Glazing U-0.28
1.7 R-49 Advanced (U-0.020) as listed in Section A102.2.1, Ceilings below a vented attic and 0.5
R-49 vaulted ceilings with full height of uncompressed insulation extending over the wall
top plate at the eaves.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R 4
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family — New & Additions (effective February 1, 2021)
Table 406.3 — Energy Credits (Single Family)
Option Description Credits: SF
2. AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION OPTIONS
Only one option from Items 2.1 through 2.4 may be selected in this category.
Compliance based on R402.4.1.2: Reduce the tested air leakage to 3.0 air changes per hour
maximum at 50 Pascals or
For R-2 Occupancies, optional compliance based on Section R402.4.1.2: Reduce the tested
air leakage to 0.3 cfm/sf maximum at 50 Pascals and
All whole house ventilation requirements as determined by Section M1507.3 of the
International Residential Code or Section 403.8 of the International Mechanical Code shall
2.1 be met with a high efficiency fan(s) (maximum 0.35 watts/cfm), not interlocked with the 0.5
furnace fan (if present). Ventilation systems using a furnace including an ECM motor are
allowed, provided that they are controlled to operate at low speed in ventilation only
mode.
To qualify to claim this credit, the building permit drawings shall specify the option being
selected and the maximum tested building air leakage, and shall show the qualifying
ventilation system and its control sequence of operation.
Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 2.0 air changes
per hour maximum at 50 Pascals or
For R-2 Occupancies, optional compliance based on Section R402.4.1.2: Reduce the tested
2.2 air leakage to 0.25 cfm/sf maximum at 50 Pascals and 1.0
All whole house ventilation requirements as determined by Section M1507.3 of the
International Residential Code or Section 403.8 of the International Mechanical Code shall
be met with a heat recovery ventilation system with minimum sensible heat recovery
efficiency of 0.65. 1
Compliance based on Section R402.4.1.2:
Reduce the tested air leakage to 1.5 air changes per hour maximum at 50 Pascals or
For R-2 Occupancies, optional compliance based on Section R402.4.1.2: Reduce the tested
2.3 air leakage to 0.25 cfm/sf maximum at 50 Pascals and 1.5
All whole house ventilation requirements as determined by Section M1507.3 of the
International Residential Code or Section 403.8 of the International Mechanical Code shall
be met with a heat recovery ventilation system with minimum sensible heat recovery
efficiency of 0.75. 1
Compliance based on Section R402.4.1.2:
Reduce the tested air leakage to 0.6 air changes per hour maximum at 50 Pascals or
For R-2 Occupancies, optional compliance based on Section R402.4.1.2: Reduce the tested
2.4 air leakage to 0.15 cfm/sf maximum at 50 Pascals and 2.0
All whole house ventilation requirements as determined by Section M1507.3 of the
International Residential Code or Section 403.8 of the International Mechanical Code shall
be met with a heat recovery ventilation system with minimum sensible heat recovery
efficiency of 0.80. Duct installation shall comply with Section R403.3.7. 1
To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall
specify the maximum tested building air leakage and shall show the heat recovery ventilation system.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family— New & Additions (effective February 1, 2021)
Table 406.3 — Energy Credits (Single Family)
Option Description Credits: SF
3. HIGH EFFICIENCY HVAC EQUIPMENT OPTIONS
Only one option from Items 3.1 through 3.6 may be selected in this category.
3.1 z
Energy Star rated (U.S. North) Gas or propane furnace with minimum AFUE of 95% or
1.0
Energy Star rated (U.S. North) Gas or propane boiler with minimum AFUE of 90%. Z
3.2 z
Air -source centrally ducted heat pump with minimum HSPF of 9.5.3
1.0
Closed -loop ground source heat pump; with a minimum COP of 3.3 or
3.32
Open loop water source heat pump with a maximum pumping hydraulic head of 150 feet
1.5
and minimum COP of 3.6. 3
Ductless mini -split heat pump system, zonal control: In homes where the primary space
3.4
heating system is zonal electric heating, a ductless mini -split heat pump system with a
1.5
minimum HSPF of 10.0 shall be installed and provide heating to the largest zone of the
housing unit. 4
3.51
Air -source, centrally ducted heat pump with minimum HSPF of 11.0. 4
1.5
Ductless split system heat pumps with no electric resistance heating in the primary living
areas. A ductless heat pump system with a minimum HSPF of 10 shall be sized and
installed to provide heat to entire dwelling unit at the design outdoor air temperature.
3.6 Z
2.0
To qualify to claim this credit, the building permit drawings shall specify the option being
selected, the heated floor area calculation, the heating equipment type(s), the minimum
equipment efficiency, and total installed heat capacity (by equipment type).
z An alternative heating source sized at a maximum of 0.5 W/sf(eq uiva lent) of heated floor area or 500 W, whichever is
bigger, may be installed in the dwelling unit.
3 To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify
the heating equipment type and the minimum equipment efficiency.
4 To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify
the heating equipment type and the minimum equipment efficiency.
4. HIGH EFFICIENCY HVAC DISTRIBUTION SYSTEM OPTIONS
All supply and return ducts located in an unconditioned attic shall be deeply buried in
ceiling insulation in accordance with Section R403.3.7.
For mechanical equipment located outside the conditioned space, a maximum of 10 linear
feet of return duct and 5 linear feet of supply duct connections to the equipment may be
4.1
outside the deeply buried insulation. All metallic ducts located outside the conditioned
0.5
space must have both transverse and longitudinal joints sealed with mastic. If flex ducts
are used, they cannot contain splices.
Duct leakage shall be limited to 3 cfm per 100 square feet of conditioned floor area.
Air handler(s) shall be located within the conditioned space.
HVAC equipment and associated duct system(s) installation shall comply with the
requirements of Section R403.3.7.
Locating system components in conditioned crawl spaces is not permitted under this
option.
4.2
Electric resistance heat and ductless heat pumps are not permitted under this option. 1.0
Direct combustion heating equipment with AFUE less than 80% is not permitted under this
option.
To qualify to claim this credit, the building permit drawings shall specify the option being
selected and shall specify the heating equipment type and shall show the location of the
heating and cooling equipment and all the ductwork.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family — New & Additions (effective February 1, 2021)
Table 406.3 — Energy Credits (Single Family)
Option Description Credits: SF
. EFFICIENT WATER HEATING OPTIONS
Only one option from Items 5.2 through 5.6 may be selected in this category. Item 5.1 may be combined with any option.
A drain water heat recovery unit(s) shall be installed, which captures waste water heat from
all and only the showers, and has a minimum efficiency of 40% if installed for equal flow or a
minimum efficiency of 54% if installed for unequal flow. Such units shall be rated in
accordance with CSA B55.1 or IAPMO IGC 346-2017 and be so labeled.
5.1
To qualify to claim this credit, the building permit drawings shall include a plumbing diagram
that specifies the drain water heat recovery units and the plumbing layout needed to install it.
Labels or other documentation shall be provided that demonstrates that the unit complies
with the standard.
Water heating system shall include one of the following:
5.2 Energy Star rated gas or propane water heater with a minimum UEF of 0.80. 5 0.5
Water heating system shall include one of the following:
Energy Star rated gas or propane water heater with a minimum UEF of 0.91 or
Solar water heating supplementing a minimum standard water heater. Solar water heating
will provide a rated minimum savings of 85 therms or 2000 kWh based on the Solar Rating and
Certification Corporation (SRCC) Annual Performance of OG-300 Certified Solar Water Heating
5.3 Systems or 1.0
Water heater heated by ground source heat pump meeting requirements of Option 3.3.
To qualify to claim this credit, the building permit drawings shall specify the option being
selected and shall specify the water heater equipment type and the minimum equipment
efficiency and, for solar water heating systems, the calculation of minimum energy savings.
Water heating system shall include one of the following:
Electric heat pump water heater meeting the standards for Tier I of NEEA's advanced water
heating specification or
5.4 For R-2 Occupancy, electric heat pump water heater(s), meeting the standards for Tier I of 1.5
NEEA's advanced water heating specification, shall supply domestic hot water to all units. If
one water heater is serving more than one dwelling unit, all hot water supply and
recirculation piping shall be insulated with R-8 minimum pipe insulation. 5
Water heating system shall include one of the following: Electric heat pump water heater
meeting the standards for Tier III of NEEA's advanced water heating specification or
5.5 For R-2 Occupancy, electric heat pump water heater(s), meeting the standards for Tier III of 2.0
NEEA's advanced water heating specification, shall supply domestic hot water to all units. If
one water heater is serving more than one dwelling unit, all hot water supply and
recirculation piping shall be insulated with R-8 minimum pipe insulation. 5
Water heating system shall include one of the following:
Electric heat pump water heater with a minimum UEF of 2.9 and utilizing a split system
configuration with the air -to -refrigerant heat exchanger located outdoors. Equipment shall
meet Section 4, requirements for all units, of the NEEA standard Advanced Water Heating
Specification with the UEF noted above or
5.6 2.5
For R-2 Occupancy, electric heat pump water heater(s), meeting the standards for Tier III of
NEEA's advanced water heating specification and utilizing a split system configuration with
the air -to -refrigerant heat exchanger located outdoors, shall supply domestic hot water to all
units. If one water heater is serving more than one dwelling unit, all hot water supply and
recirculation piping shall be insulated with R-8 minimum pipe insulation. 5
5 To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall
specify the water heater equipment type and the minimum equipment efficiency.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family — New & Additions (effective February 1, 2021)
Table 406.3 — Energy Credits (Single Family)
Option Description Credits: SF
6. RENEWABLE ELECTRIC ENERGY OPTION
For each 1200 kWh of electrical generation per housing unit provided annually by on -site
wind or solar equipment a 1.0 credit shall be allowed, up to 3 credits. Generation shall be
calculated as follows:
For solar electric systems, the design shall be demonstrated to meet this requirement using
the National Renewable Energy Laboratory calculator PVWATTs or approved alternate by
the code official.
6.1 Documentation noting solar access shall be included on the plans. For wind generation 1.0
projects designs shall document annual power generation based on the following factors:
the wind turbine power curve; average annual wind speed at the site;
frequency distribution of the wind speed at the site and height of the tower.
To qualify to claim this credit, the building permit drawings shall specify the option being
selected and shall show the photovoltaic or wind turbine equipment type, provide
documentation of solar and wind access, and include a calculation of the minimum annual
energy power production.
7. APPLIANCE PACKAGE OPTION
All of the following appliances shall be new and installed in the dwelling unit and shall meet
the following standards:
Dishwasher — Energy Star rated
Refrigerator (if provided) — Energy Star rated
Washing machine — Energy Star rated
7.1 Dryer — Energy Star rated, ventless dryer with minimum CEF rating of 5.2 0.5
To qualify to claim this credit, the building permit drawings shall specify the option being
selected and shall show the appliance type and provide documentation of Energy Star
compliance. At the time of inspection, all appliances shall be installed and connected to
utilities. Dryer ducts and exterior dryer vent caps are not permitted to be installed in the
dwelling unit.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
Window, Skylight and Door Schedule
Project Information
Contact Information
Ga Residence Addition
Jinny Park
855 Da on St
jinnyparkarch@gmail.com
Width Height
Ref. U-factor Qt.
Feet "`" Feet "`"
Area UA
Exempt Swinging Door (24 sq. ft. max.)
11
13
°
17
°
21.0 5.25
Exempt Glazed Fenestration (15 sq. ft. max.)
).01 0.00
Vertical Fenestration (Windows and doors)
Component
Description Ref. U-factor
1
Marvin
0.25
2
Marvin
0.23
3
Marvin
0.23
4.5
Marvin
0.23
6,40
Marvin
0.23
6a
Marvin
0.23
7
Marvin
0.23
8
Marvin
0.23
9
Marvin
0.25
10
Marvin
0.25
11
Marvin
0.23
12,13
Marvin
0.23
14,15
Marvin
0.25
16,17
Marvin
0.23
18,20
Marvin
0.23
19
Marvin
0.23
21
Marvin
0.25
22
Marvin
0.23
23
Marvin
0.23
23a
Marvin
0.23
24
Marvin
0.23
24a
Marvin
0.23
25,26,27
Marvin
0.25
28,29,30
Marvin
0.23
31
Marvin
0.25
32,33,39
Marvin
0.25
34
Marvin
0.25
35
Marvin
0.25
36.37
Marvin
0.25
38
Marvin
0.25
40
Marvin
0.25
41
Marvin
0.23
42
Marvin
0.25
45
Marvin
0.25
Width Height
Qt. Feet"" Feet 1"`"
Sum of Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
Area UA
725.81 173.86
0.24
Overhead Glazing (Skylights)
Component Width Height
Description Ref. U-factor Qt. Feet 1"°h Feet mh Area UA
43 Marvin 0.50 1 2 ° 4 ° 8.0 4.00
44 Marvin 0.50 1 2 ° 3 ° 6.0 3.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
Sum of Overhead Glazing Area and UA 1 14.0 7.00
Overhead Glazing Area Weighted U = UA/Area 1 0.50
Total Sum of Fenestration Area and UA (for heating system sizing calculations) 760.8 186.11
simple heating system size: wasnington state
This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code (WSEC) and ACCA Manuals
J and S. This tool will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads.
Please complete the green drop -downs and boxes that are applicable to your project. As you make selections in the drop -downs for each section, some
values will be calculated for you. If you do not see the selection you need in the drop -down options, please contact the WSU Energy Program at
energycode@energy.wsu.edu or (360) 956-2042 for assistance.
Project Information Contact Information
Gary Residence Addition Jinny Park - AN
855 Dayton St jinnyparkarch gmail.com
Heating System Type: O All other systems 0 Heat Pump
To see detailed instructions for each section, place your cursor on the word 'Instructions"
Design Temperature
Instructions Design Temperature Difference (AT)
I Edmonds
AT =Indoor (70 degrees) -Outdoor Design Temp
Are- of Building
Conditioned Floor Area
instrucuons Conditioned Floor Area (sq ft)
1,805
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
8.0
14,440
Glazing and Doors
U-Factor
X Area =
UA
Instructions
u-o.25
0.250
726
181.50
Skylights
U-Factor
X Area =
UA
Instructions
0.50
14 1
7.00
Insulation
Attic
U-Factor
X Area =
UA
Instructions 60 R-49
0.026
1,116
29.02
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions
0.027
403 7
10.88
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions I Select R-Value
1
� No selection
1,152
Floors
U-Factor
X Area
UA
Instructions
� 0.025
1,432
35.80
R-38
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
No selection
0
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
Select conditionln9
� No selection
� J
---
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
Select R-Value
� No selection
0
Location of Ducts
Instructions
Duct Leakage Coefficient
Conditioned Space
1.00
Sum of UA
264.20
Figure 1.
Above Grade
46
Envelope Heat Load 12,153 Btu / Hour
Sum of UA x AT
Air Leakage Heat Load 7,174 Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 19,327 Btu / Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 19,327 Btu / Hour
Ducts in unconditioned space: sum of building heat loss x 1.10
Ducts in conditioned space: sum of building heat loss x 1
Maximum Heat Equipment Output 24,159 Btu / Hour
Building and duct heat loss x 1.40 for forced air furnace
Building and duct heat loss x 1.25 for heat pump
(07101113)
Alterations Worksheet - 2018 Washington State Energy Code
Project Information Contact Information
Gary Residence Addition
855 Dayton St
Jinny Park
iinnyparkarch@smail.com
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? F-, Yes F 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
Will the roof/ceiling framing cavities or attic be exposed? F,-, Yes F 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
Will the floor framing cavities be exposed?
Install R-49 insulation or what the attic space can
accommodate based on the roof pitch
Yes F No
If yes: Exposed floor cavities must be insulated to R-30
Are the windows and/or doors being replaced? P Yes F No
(includes both window or door and frames)
If yes: New windows and doors must have an area weighted average U-factor of :50.30
Will the heating or cooling system be replaced? P Yes F No
If yes: New equipment must meet current requirements and
ducts need to be tested
Will the hot water system be altered? P Yes F No
If yes: New water heating equipment must meet current code requirements
Are more than 50% of the light fixtures being changed? F,-, Yes F 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.