Prescriptive Worksheet Both Zones 2015 mod Ken Wilson DuplexPrescriptive Energy Code Compliance for All Climate Zones in Washington
Project Information
Ken Wilson Duplex
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
Fenestration U-Factorb
Skylight U-Factor
Glazed Fenestration SHGCb,e
Ceilingk
Wood Frame Wallg,m,n
Mass Wall R-Valuei
Floor
Below Grade Wallc,m
Slabd R-Value & Depth
*Table R402.1.1 and Table R402.1.3 Footnotes included on Page 2.
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
2. Medium Dwelling Unit: 3.5 credits
3. Large Dwelling Unit: 4.5 credits
4. Additions less than 500 square feet: .5 credits
Table R406.2 Summary
Option
1a
1b
1c
1d
2a
2b
2c
3a
3b
3c
3d
4
5a
5b
5c
5d
6
Total Credits
*Please refer to Table R406.2 for complete option descriptions
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.
c "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.
h Reserved.
i The second R-value applies when more than half the insulation is on the interior of the mass wall.
j Reserved.
k For single rafter- or joist-vaulted ceilings, the insulation may be reduced to R-38.
l 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.
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.
All dwelling units that are not included in #1 or #3. Exception: Dwelling units serving R-2 occupancies shall require 2.5 credits.
Dwelling units exceeding 5000 square feet of conditioned floor area.
Description
Efficient Building Envelope 1a
Efficient Building Envelope 1b
Efficient Building Envelope 1c
Efficient Building Envelope 1d
Air Leakage Control and Efficient Ventilation 2a
Air Leakage Control and Efficient Ventilation 2b
Air Leakage Control and Efficient Ventilation 2c
High Efficiency HVAC 3a
High Efficiency HVAC 3b
High Efficiency HVAC 3c
High Efficiency HVAC 3d
High Efficiency HVAC Distribution System
Efficient Water Heating 5a
Efficient Water Heating 5b
Efficient Water Heating 5c
Efficient Water Heating 5d
Renewable Electric Energy
R-Valuea
n/a
n/a
n/a
49j
21 int
21/21h
30g
10/15/21 int + TB
10, 2 ft
U-Factora
0.3
0.5
n/a
0.026
0.056
0.056
0.029
0.042
n/a
Contact Information
Dolphin Quest Home Deisgn
Credit(s)
0.5
1
2
0.5
0.5
1
1.5
1
1
1.5
1
1
0.5
1
1.5
0.5
0.5
Date ___________________________
*1200 kwh
1
0.5
0
1.5
True
True
True
False
True
False
False
False
False
False
False
False
True
False
False
False
False
True
False
False
False