REVIEWED BLD2022-1025+HEATING+8.3.2022_8.10.40_AM+3029372BLD2022-1025
RECEIVED
Ai In in 7(177
simple Heating system size: wasnington state -
This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code (WSEC) and& MENT
Manuals J and S. This tool will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling ItTM
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
Duffy Residence Brian and Nancy Duffy
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 I Design Temperature Difference (AT)
Edmonds AT= Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
3,359
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
8.6
28,887
Glazing and Doors
U-Factor
X Area =
UA
Instructions
u-o.za
J 0.280
708
198.24
Skylights
U-Factor
X Area =
UA
Instructions
0.50
40
20.00
Insulation
Attic
U-Factor
X Area =
UA
Instructions
LR49
�
I 0.026
J
1,736
45.14
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions L R-38 Vented
0.027
189
5.10
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
L R-21 Intermediate
�
0.056
2,411
135.02
Floors
U-Factor
X Area
UA
R-38
0.025
309
7.73
J
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
R-21 interior
0.042
615
25.83
L
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
LR-5 Thermal
0.570
95
54.15
Break at slab edge
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions L0.540
R-10 Perimeter
�
86
46.44
Location of Ducts
Instructions
Duct Leakage Coefficient
`Conditioned Space
J
1.00
Sum of UA
537.64
Figure 1.
Above Grade
46
Envelope Heat Load 24,731
Btu / Hour
Sum of UA x AT
Air Leakage Heat Load 14,351
Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 39,083
Btu / Hour
Air leakaqe + envelope heat loss
Building and Duct Heat Load 39,083
Btu / Hour
Ducts in unconditioned space: sum of buildino heat loss x
1.10
Ducts in conditioned space: sum of building heat loss x 1
Maximum Heat Equipment Output 48,853
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
;ES
(07101113)