REVIEWED BLD-resub1 BLD2021-1146+WSEC+(LOCKED)10.14.2021_1.23.07_PM+2463474REVIEWED RESU B
BLD2021-1146 BY
CITY OF EDMONDS Oct 14 2021
BUILDING DEPARTMENT CITY OF EDMONDS
Simple Heating System Size. Washington State """""""""""'-"""""""""""" DEVELOPMENT SERVICES
TMENT
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
Edmonds plan
Heating System Type: O All other Systems
Contact Information
* Heat Pump
To see detailed instructions for each section, place your cursor on the word "Instructions"
Design Temperature
Instructions
Edmonds
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
Average Ceiling Height
Instruction Average Ceiling Height (ft)
Glazing and Doors
Instructions
U-0.25 �
Skylights
Instructions
Insulation
Attic
Instructions
R-49 1
Single Rafter or Joist Vaulted Ceilings
Instructions
R-38 Vented �
Above Grade Walls (see Figure 1)
Instructions
R-21 Intermediate
Floors
Instructions ( i
l -
R 38 J
Below Grade Walls (see Figure 1)
Instructions I
R-10 Continuous Exterior
Slab Below Grade (see Figure 1)
Instructions
R-21 int Plus R-5 ci �
Slab on Grade (see Figure 1)
Instructions
R-10 Perimeter V,
Location of Ducts
Instructions
Unconditioned Space
Figure 1.
Above Grade
Below Grade
Design Temperature Difference (AT)
AT = Indoor (70 degrees) - Outdoor Design Temp
1,785
Conditioned Volume
9.1
16,244
U-Factor
X
Area =
UA
0.250
659
164.75
U-Factor
X
Area =
UA
0.50
---
U-Factor
X
Area =
UA
0.026
2,537
65.96
U-Factor
X
Area
UA
0.027
896
24.19
U-Factor
X
Area
UA
0.056
1,885
105.56
U-Factor
X
Area
UA
0.025
U-Factor
X
Area
UA
0.064
889
56.90
F-Factor
X
Length
UA
0.303
F-Factor
X
Length
UA
0.540
Duct Leakage Coefficient
1.10
Sum of UA 417.36
W.
Envelope Heat Load 19,199
Btu/Hour
Sum of UA x AT
Air Leakage Heat Load 8,070
Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 27,268
Btu / Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 29,995
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 37,494
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)