2021.0043 UNIT A 2018 Energy(07/01/13)
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 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
YELM APTS JERRY SCHUUR
PO BOX 597 PUYALLUP, WA 98371
UNIT A- ALL UNITS
Heating System Type:
To see detailed instructions for each section, place your cursor on the word "Instructions"
Design Temperature
Instructions Design Temperature Difference (∆T)53
∆T = Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)1,113
Average Ceiling Height Conditioned Volume
Instructions Average Ceiling Height (ft)9.0 10,017
Glazing and Doors U-Factor X Area =UA
Instructions 0.280 120 33.60
Skylights U-Factor X Area =UA
Instructions 0.50 ---
Insulation
Attic U-Factor X Area =UA
Instructions 0.026 1,113 28.94
Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA
Instructions No selection ---
Above Grade Walls (see Figure 1)U-Factor X Area UA
Instructions 0.056 928 51.97
Floors U-Factor X Area UA
Instructions ---________
Below Grade Walls (see Figure 1)U-Factor X Area UA
Instructions No selection ---
Slab Below Grade (see Figure 1)F-Factor X Length UA
Instructions No selection ---
Slab on Grade (see Figure 1)F-Factor X Length UA
Instructions 0.540 136 73.44
Location of Ducts
Instructions Duct Leakage Coefficient
1.00
Sum of UA 187.95
Envelope Heat Load 9,961 Btu / Hour
Sum of UA x ∆T
Air Leakage Heat Load 5,734 Btu / Hour
Volume x 0.6 x ∆T x 0.018
Building Design Heat Load 15,695 Btu / Hour
Air leakage + envelope heat loss
Building and Duct Heat Load 15,695 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 19,619 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
Above Grade
Below Grade
Figure 1.
All Other Systems Heat Pump
Lacey
No Ducts
R-10 Perimeter
Select conditioning
Select R-value
No Floors above unconditioned spaces.
R-21 Intermediate
Select R-Value
R-49
U-0.28
Window, Skylight and Door Schedule
Project Information Contact Information
YELM APTS JERRY SCHUUR
PO BOX 597 PUYALLUP, WA 98371
UNIT A
Width Height
Ref.U-factor Qt.Feet Inch Feet Inch Area UA
Exempt Swinging Door (24 sq. ft. max.)MFR 0.30 1 3 6 8 20.0 6.00
Exempt Glazed Fenestration (15 sq. ft. max.)0.0 0.00
Vertical Fenestration (Windows and doors)
Component Width Height
Description Ref.U-factor Qt.Feet Inch Feet Inch Area UA
BED 2 MFR 0.28 1 5 4 20.0 5.60
BED 3 0.28 1 5 4 20.0 5.60
MSTR BED 0.28 3 2 6 4 30.0 8.40
0.0 0.00
LIVING ROOM 0.28 1 7 6 4 30.0 8.40
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
Sum of Vertical Fenestration Area and UA 100.0 28.00
Vertical Fenestration Area Weighted U = UA/Area 0.28
Overhead Glazing (Skylights)
Component Width Height
Description Ref.U-factor Qt.Feet Inch Feet Inch Area UA
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
0.0 0.00
Sum of Overhead Glazing Area and UA 0.0 0.00
Overhead Glazing Area Weighted U = UA/Area 0.00
Total Sum of Fenestration Area and UA (for heating system sizing calculations)120.0 34.00