APPROVED BLD-BLD2020-1359+Energy_Calculations+12.11.2020_8.57.33_AMPrescriptive Energy Code Compliance for All Climate Zones in Washington
Project Information Contact Information
Flores Residence Neil Jorgensen
19804 81 st PI W J3 Architects LLC
Edmonds, WA 98026 425-242-0369
This project will use the requirements of the Prescriptive Path below and incorporate the
the minimum values listed. In addition, based on the size of the structure, the appropriate
number of additional credits are checked as chosen by the permit applicant.
Authorized Representative
All Climate Zones
R-Valuea
U-Factora
Fenestration U-Factorb
n/a
0.30
Skylight U-Factor
n/a
0.50
Glazed Fenestration SHGCb,e
n/a
n/a
Ceilingk
49'
0.026
Wood Frame Wall9,m,"
21 int
0.056
Mass Wall R-Value'
21/21h
0.056
Floor
309
0.029
Below Grade Wall"m
10/15/21 int + TB
0.042
Slab R-Value & Depth
10, 2 ft
n/a
*Table R402.1.1 and Table R402.1.3 Footnotes included on Page 2.
Date
Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 so as to achieve
the following minimum number of credits:
1. Small Dwelling Unit: 1.5 credits
❑ Dwelling units less than 1500 square feet in conditioned floor area with less than 300 square feet of fenestration
area. Additions to existing building that are greater than 500 square feet of heated floor area but less than 1500
square feet.
❑2. Medium Dwelling Unit: 3.5 credits
All dwelling units that are not included in #1 or #3. Exception: Dwelling units serving R-2 occupancies shall
require 2.5 credits.
❑3. Large Dwelling Unit: 4.5 credits
Dwelling units exceeding 5000 square feet of conditioned floor area.
4. Additions less than 500 square feet: .5 credits
Table R406.2 Summary
Option Description
Credit(s)
1a
Efficient Building Envelope 1a
0.5
1 b
Efficient Building Envelope lb
1.0
1c
Efficient Building Envelope 1c
2.0
1d
Efficient Building Envelope 1d
0.5
2a
Air Leakage Control and Efficient Ventilation 2a
0.5
2b
Air Leakage Control and Efficient Ventilation 215
1.0
2c
Air Leakage Control and Efficient Ventilation 2c
1.5
3a
High Efficiency HVAC 3a
1.0
3b
High Efficiency HVAC 3b
1.0
3c
High Efficiency HVAC 3c
1.5
3d
High Efficiency HVAC 3d
1.0
4
High Efficiency HVAC Distribution System
1.0
5a
Efficient Water Heating 5a
0.5
5b
Efficient Water Heating 5b
1.0
5c
Efficient Water Heating 5c
1.5
5d
Efficient Water Heating 5d
0.5
6
lRenewable Electric Energy
0.5
Total Credits
*Please refer to Table R406.2 for complete option descriptions
0.50
Table R402.1.1 Footnotes
For SI: 1 foot .= 304.8 mm, ci .= continuous insulation, int .= intermediate framing.
a R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is
less 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.
b The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
"10/15/21.+TB" means R-10 continuous insulation on the exterior of the wall, or R-15 on the 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 the interior of the basement wall. "10/15/21.+TB" 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. "10/13" means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity
insulation at the interior of the basement wall. "TB" means thermal break between floor slab and basement
wall.
d R-10 continuous insulation is required under heated slab on grade floors. See R402.2.9.1.
e There are no SHGC requirements in the Marine Zone.
f Reserved.
g Reserved.
b Reserved.
The second R-value applies when more than half the insulation is on the interior of the mass wall.
'Reserved.
k For single rafter- or joist -vaulted ceilings, the insulation may be reduced to R-38.
Reserved.
M Int. (intermediate framing) denotes standard framing 16 inches on center with headers insulated with a
minimum of R-10 insulation.
Table R402.1.3 Footnote
a Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source or as
specified in Section R402.1.3.
Alterations Worksheet 2015 Washington State Energy Code
Project Information Contact Information
Flores Residence
19804 81 st PI W
Edmonds, WA 98026
Neil Jorgensen
J3 Architects
425-242-0369
The Washington State Energy Code requirements for alterations are located in Chapter 5
Alterations (remodels) do not need to obtain energy credits from Table R406.2
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? W, 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
W, Yes F- No
If yes: Exposed floor cavities must be insulated to R-30
Are the windows and/or doors being replaced? F- Yes V 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? F- Yes Fv- No
If yes: New equipment must meet current requirements and
ducts need to be tested
Will the hot water system be altered? F- Yes V No
If yes: New water heating equipment must meet current code requirements
Are more than 50% of the light fixtures being changed? F- Yes V 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.
R502.1.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of the addition shall comply with Sections
R403.1, R403.2, R403.3, R403.5 and R403.6.
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 R403.4.
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.
Simple Heating System Size: Washington State
This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code (WSEC) and ACCA Manuals
J and S. This calculator will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine coolinq loads.
The glazing (window) and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of 0.30.
The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2015 WSEC.
Please fill out all of 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 call the WSU Energy Extension Program at
(360) 956-2042 for assistance.
Project Information Contact Information
Flores Residence Neil Jorgensen
19804 81st PI W 13 Architects LLC
Edmonds, WA 98026 79 JMW 425-242-0369
Heating System Type: O All other systems Q Heat Pump
To see detailed instructions for each section, place your cursor on the word "Instructions".
Design Temperature
instructions Design Temperature Difference (AT)
Edmonds AT = Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
instructions Conditioned Floor Area (sq ft)
107
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
8.0
856
Glazing and Doors
U-Factor
X Area =
UA
Instructions
1
0.30
---
Skylights
U-Factor
X Area =
UA
Instructions
0.50
---
Insulation
Attic
U-Factor
X Area =
UA
Instructions
Select R-Value
�
No selection
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions
R-38 Vented
�
0.027
107
2.89
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
0.056
234
13.13
R-21 Intermediate
�
Lf
Floors
U-Factor
X Area
UA
Instructions
0.025
107
2.68
R-38
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
No Below Grade Walls in this project
L�
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
No Slab Below Grade in this project.
�
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
No Slab on Grade in this project.
�
� ---
Location of Ducts
Instructions
Duct Leakage Coefficient
No Ducts
1.00
Sum of UA
18.69
Figure 1.
Above Grade
46
Envelope Heat Load
860 Btu / Hour
Sum of UA X dT
Air Leakage Heat Load
425 Btu / Hour
Volume 0.6XATX.018
Building Design Heat Load
1,285 Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load
1,285 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
1,799 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
(07/01/13)