REVIEWED BLD BLD2020-0965+Energy+9.17.2020_1.35.55_PMPrescriptive Energy Code Compliance for All Climate Zones in Washington
Project Information Contact Information
HELLEREN RESIDENCE LEIF AND KIM HELLEREN
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,,
n/a
n/a
Ceilingk
49i
0.026
Wood Frame Wall9,m,n
21 int
0.056
Mass Wall R-Value
21/21h
0.056
Floor
309
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.
0 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)
1 a
Efficient Building Envelope 1 a
0.5
1 b
Efficient Building Envelope 1 b
1.0
1 c
Efficient Building Envelope 1 c
2.0
1 d
Efficient Building Envelope 1 d
0.5
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
Renewable Electric Energy
0.5
Total Credits
*Please refer to Table R406.2 for complete option descriptions
El
El
El
El
0 0.5
El
El
0 1.0
El
El
El
El
0 0.5
El
0 1.5
El
*1200 kwh 0.0
3.50
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.
1110/15/21.+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.
' 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.
simple neazing system size: yvasnington 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 cooling
loads.
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
HELLEREN RESIDENCE LEIF AND KIM HELLEREN
Heating System Type: ® All Other Systems O Heat Pump
To see detailed instructions for each section, place your cursor on the word 'Instructions".
Design Temperature
Instructions Edmonds ]] Design Temperature Difference (AT)
J
dT =Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
4,484
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
9.1
40,804
Glazing and Doors
U-Factor
X Area =
UA
Instructions
U-0.30
J 0.300
794
238.20
Skylights
U-Factor
X Area =
UA
Instructions
0.50
32
16.00
Insulation
Attic
U-Factor
X Area =
UA
Instructions L R-49
.
, 0.026
351
9.13
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
1 R-38 vented
W
0.027
3,222
86.99
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
6 R-21 Intermediate
1 0.056
4,771
267.18
Floors
U-Factor
X Area
UA
LR-30
.
J 0.029
3,653
105.94
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
No Below Grade Walls in this
I 0.028
project.
Slab Below Grade Csee Ficturel
F-Factor
X Length
UA
No Below in
J 0.303
00
---
Slab Grade this project.
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
0
No Slab on Grade in this project.
J
Location of Ducts
Instructions
j Duct Leakage Coefficient
Unconditioned Space
J
1.10
Sum of UA
723.43
Figure 1.
Above Grade
46
Envelope Heat Load
33,278
Btu / Hour
Sum of UA X AT
Air Leakage Heat Load
20,272
Btu / Hour
VolumeX 0.6XATX.018
Building Design Heat Load
53,550
Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load
58,904
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
82,466
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)