REVIEWED Mechanical Calculations..................... RECEIVED
REVIEWED
BY
CITY OF EDMONDS i Apr 21 2022
BUILDING DEPARTMENT
simple meating system size: wasnln ion staie DEVE.
LOPMEN�^SERV
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 Contact Information
BAILEY & PAWLING RESIDENCE LEIF HELLEREN - HELLEREN CONSTRUCTION
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 'V J
AT =Indoor (70 degrees) -Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
F 3,923
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
8.3
32,365
Glazing and Doors
U-Factor
X Area =
UA
Instructions
ate
0.280
658
184.24
Skylights
U-Factor
X Area =
UA
Instructions
0.50
0�
Insulation
Attic
U-Factor
X Area =
UA
Instructions R-38Advanced
J 0.026
F7,652
42.95
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instruction
1
No Vaulted Ceilings in this project.
---
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
In 6R-21Intermediate
0.056
2,608
146.05
Floors
U-Factor
X Area
UA
Instruc. in R-38
I 0.025
773
19.33
J
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions �R-21Interior
I 0.042
J
343
14.41
Slab Below Grade (see Figure 1
F-Factor
X Length
UA
Instructions
R-10 Fully insulated
�
0.303
45
13.48
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
, 0.360
66
23.76
R-10 Fully insulated
Location of Ducts
Instructions
I Duct Leakage Coefficient
Conditioned Space
J
1.00
Sum of UA
444.21
Figure 1.
Above Grade
46
Envelope Heat Load 20,434
Btu / Hour
Sum of UA x AT
Air Leakage Heat Load 16,079
Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 36,513
Btu / Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 36,513
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 45,641
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)