APPROVED BLD-BLD2020-0840+Energy_Calculations+7.30.2020_12.25.19_PMRECEIVED BLD2020-0840
Aug 25 2020
Simple Heating System Size: Washington State CITY OFEDMONDS
This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 Washin ton o e WSEC and ACCA
Manuals J and S. This calculator will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling
loads.
The glazing (window) and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of
0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2012 WSEC.
Please fill out all of 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 call the WSU Energy Extension
Program at (360) 956-2042 for assistance.
Project Information
Contact Information
11x32 Addition above Garage
Wartell
21423 95th PI. W
Edmonds, WA 98020
Heating System Type: •AII Other systems
o Heat Pump
To see detailed instructions for each section, place your cursor on the word 'Instructions".
Design Temperature
Instructions
Design Temperature
Design
Difference (AT)
46
Edmonds
= Indoor (70
degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
367
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
7.8
2,874
Glazing and Doors
U-Factor
X Area =
UA
Instructions
0.30
1 55
16.50
Skylights
U-Factor
X Area =
UA
Instructions
0.50
00
---
Insulation
Attic
U-Factor
X Area =
UA
Instructions R_4y
0.026
367
9.54
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions No Vaulted Ceilings in this project.
V
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions R-21Intermediate
0.056
438 24.53
Floors
U-Factor
X Area
UA
_
Instructions
0.025
367
9.18
Ras
Below Grade Walls (See Figure 1)
U-Factor
X Area
UA
Instructions No Below Grade Walls in this project.
---
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
Instructions No Slab Below Grade in this project.
V
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
;p Perimeter
V
0.540
�n
Location of Ducts
Instructions
Duct
Leakage Coefficient
Vnconditioned Space
�
1.10
Sum of UA
59.75
Envelope Heat Load
2,748
Btu / Hour
Figure 1. SumofuAXOT
Air Leakage Heat Load
1,428
Btu / Hour
Volume 0.6XATX.018
Building Design Heat Load
4,176
Btu /Hour
�.e
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load
4,593
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
6,431
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
(07101113)