BLD2024-0268+HEATING Calculations+2.28.2024_2.14.51_PM+4090112I00A "DY-iyZ9iyZ91:3
simple mating system size: wasnington state
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
energycode@energy.wsu.edu or (360) 956-2042 for assistance.
Project Information Contact Information
GARAGE CONVERSION TO ADU LIVING SPACE MARGO HENSON
Heating System Type: o All other systems • Heat Pump
To see detailed instructions for each section, place your cursor on the word "Instructions" RECEIVED
Design Temperature
Instructions Design Temperature Difference (AT) 46 Mar 04 2024
Edmonds
AT =Indoor (70 degrees) -Outdoor Design Temp
CITY OF EDMONDS
A- ^F Building DEVELOPMENT SERVICES
DEPARTMENT
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft) F 572
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
7.8
4,462
Glazing and Doors
U-Factor
X Area =
UA
Instructions
u-o.Bo
0.300
125
37.50
Skylights
U-Factor
X Area =
UA
Instructions
0.50
0�
---
Insulation
Attic
U-Factor
X Area =
UA
Instructions R-49
0.026
572
14.87
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions
No Vaulted Ceilings in this project.
Above Grade Walls (see Figure1)
U-Factor
X Area
UA
Instructions R-21Intermediate
0.056
855
47.88
Floors
U-Factor
X Area
UA
Instructions
No Floors above unconditioned spaces.
�
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions No Below Grade Walls in this project.
0.028
0�
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
No Below in
�
0.303
0�
---
Slab Grade this project.
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
0.540
96
51.84
R-10 Perimeter
Location of Ducts
Instructions
Duct Leakage Coefficient
Conditioned Space
�
1.00
Sum of UA
152.09
Envelope Heat Load 6,996
Btu I Hour
Figure 1. Sum of UA x AT
Air Leakage Heat Load 2,217
Btu I Hour
Volume x 0.6 x AT x 0.018
Above Grade Building Design Heat Load 9,213
Btu I Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 9,213
Btu I Hour
Ducts in unconditioned space: sum of buildinq heat loss x 1.10
Ducts in conditioned space: sum of building heat loss x 1
Maximum Heat Equipment Output 11,516
Btu I Hour
Buildinq and duct heat loss x 1.40 for forced air furnace
Buildinq and duct heat loss x 1.25 for heat pump
(07101113)