REVIEWED Heating Calculations+3.3.2022_11.55.37_AM+2715120REVIEWED
RECEIVED
3/17/2022
Simple Heating System Size: Washington State
This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code (WSEC) and AC'C9'�o` F\lFI
Manuals J and S. This tool will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine coolinq`lnaB'.
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 Contact Information
GETACHEW & SOLOMON RESIDENCE LEIF HELLEREN
Heating System Type: O All Other Systems OO Heat Pump
To see detailed instructions for each section, place your cursor on the word "Instructions"
Design Temperature
Instructions Design Temperature Difference (AT)
Edmonds '7 J
AT =Indoor (70 degrees) -Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
F 3,683
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
9.1
33,515
Glazing and Doors
U-Factor
X Area =
UA
Instructions
aze
0.280
840
235.20
Skylights
U-Factor
X Area =
UA
Instructions
0.50
0�
Insulation
Attic
U-Factor
X Area =
UA
Instructions R 4g
I 0.026
J
2,387
62.06
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instruction
No Vaulted Ceilings in this project.
---
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
In 61 1Intermediate
0.056
F-3,5997
201.54
Floors
U-Factor
X Area
UA
Instruc. in R-38
I 0.025
F 2,382
59.55
J
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
No Below Grade Walls in this project.
�
I 0.028
1
00
Slab Below Grade see Figure 1)
F-Factor
X Length
UA
Instructions60 No Slab Below Grade in this project.
�
I 0.303
J
00
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
in
I
No Slab or Grade this project.
J
Location of Ducts
Instructions
I Duct Leakage Coefficient
Conditioned Space
J
1.00
Sum of UA
558.36
Figure 1.
Above Grade
46
Envelope Heat Load 25,684
Btu / Hour
Sum of UA x AT
Air Leakage Heat Load 16,650
Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 42,335
Btu / Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 42,335
Btu / Hour
Ducts in unconditioned soace: sum of buildina heat loss x
1.10
Ducts in conditioned space: sum of building heat loss x 1
Maximum Heat Equipment Output 52,918
Btu / Hour
Buildino and duct heat loss x 1.40 for forced air furnace
Buildino and duct heat loss x 1.25 for heat puma
(07101113)