ADU WSECPrescriptive Energy Code Compliance for All Climate Zones in Washington
Project Information Contact Information
Hoy Marie Anderson @ Nash & Asso Architects
ADU (425) 242-7491
9/3/19 Marie@Nash-Architects.com
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-Value
U-Factor
Fenestration U-Facto
n/a
0.30
Skylight U-Factor
n/a
0.50
Glazed Fenestration SHGC ,6
n/a
n/a
Ceilingk
490
0.026
Wood Frame Walig.m.n
21 int
0.056
Mass Wall R-Value'
21/21 `
0.056
Floor
30,
0.029
Below Grade Wall'
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.
02. 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)
1 a
Efficient Building Envelope 1 a
0.5
1 b
Efficient Building Envelope 1 b
1.0
1c
Efficient Building Envelope I
2.0
1d
Efficient Building Envelope 1d
0.6
2a
Air Leakage Control and Efficient Ventilation 2a
0.5
2b
Air Leakage Control and Efficient Ventilation 2b
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
0.5
El
ter^';'Jn
U0LD� A
o
1.0
*1200 kwh
0.0
1.50
e)0.2-0tri - t �-D 6
Window, Skylight and Door Schedule
Picicd Information Contact Information
Hoy Marie Anderson(Nash & Asso Architects
ADU (425) 242-7491 �^
�9i3119.if lmavaRNaSh-AfchIteclS.Com
Width Height
Ref U-factor Ot Feet Inch Feet '-h Area UA
Exempt Swinging Door (24 sq. ft max.) 0.49 1 378 24.0 11,76
Exempt Glazed Fenestration (15 sq. ft. max-) 0.28 1 11 13 1 15 115.0 4.20
Vertical Fenestration (Windows and doors)
Component
Door
Patio
Width Height
Ket.
Sum of Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
196,81 58.83
0.30
Overhead Glazing (Skylights)
Component Width Height
Description Ref. U•faclor Ot. Feet I"`h Feet 1",h Area UA
0.0 0.00
_ OA 0.00
I 0-0 0,00
! 00 0.00
0.0 0,00
00 0-00
Sum of Overhead Glazing Area and UA 0 0 0.00
Overhead Glazing Area Weighted U = UA/Area 0,00
Total Sum of Fenestration Area and UA (for heating system sizing calculations) f23TBT 74791
Simple Heating System Size: Washington State '
This heating system sizing calculator is based on the Prescriptive Re flf meats of the 2015 Washington Stag Energy Code f WSEC and ACCA
Manuals J and S. This calculator will calculate healing loads oniv. ACGA DrocecSures for sizing cooling systems should be used to determine cooling
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
Hoy Marie Anderson @ Nash & Asso Architects
ADU (425)242-7491 _
9/3/19. Fmar*ie@Nash-Architects.com
Heating System Type; O All Other Systems O Heat Pump
To see detailed instructions for each section, place your cursor on the word 'Instructions".
Design Temperature
Instructions Design Temperature Difference (AT) 46
Edmonds --
AT =Indoor (70 degrees) - Outdoor Design Temp
Area of Buildinq
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
795
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
9.0
7,155
Glazing and Doors
U-Factor
X Area =
UA
Instructions
236
0.30
70.74
Skylights
U-Factor
X Area =
UA
morn,^.lions
0.50
L.
---
Insulation
Attic
U-Factor
X Area -
UA
nstruct Ins R-as
w
0.026
F 795
20.67
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instruction:;:i�
Select R-Value
.
No selection
Above Grade Walls (seeFiouret)
U-Factor
X Area
UA
Instructions R..21 intermediate
0.056
970
54.33
Floors
U-Factor
X Area
UA
Instructions - - "-
R-38
0.025
795
19.88
Below Grade Walls (see Figure 1)
U-Factor
X Area —�
UA
Instructions SefectR_valua
„
No selection
(�
L—.__1
•--
Slab Below Grade rseeFigure v
F-Factor
X Length
UAUA
instructions select conditioning
.
No selection
---
Slab on Grade (seeFioure a
F-Factor
X Length
UA
lw5tructions select R-Value
No selection
--I
---
Location of Ducts
mstrucunns
Duct Leakage Coefficient
untondmonedSpace
t
1.10
Sum of UA
165.62
Envelope Heat Load
7,618
Btu / Hour
Figure 1. Sum of UAXAT
Air Leakage Heat Load
3,555
Btu / Hour
Volume 0 6 X ATX 016
anogr.+d� Building Design Heat Load
11,173
Btu/Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load
12,290
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
17,206
Btu / Hour
Building and Duct Heat Loss X 1,40 for Forced Air Furnace
Building and Duct Heaf Loss X 125 nor Heat Pump
(071011-13)