2021.0008 210112 - Peterson 4-Plex - UNIT 4 - Heating_System_Sizing_WorksheetSimple Heating System Size: Washington State
Project Information Contact Information
Heating System Type:
To see detailed instructions for each section, place your cursor on the word "Instructions".
Design Temperature
Instructions Design Temperature Difference (∆T) 46
∆T = Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft) 1,211
Average Ceiling Height Conditioned Volume
Instructions Average Ceiling Height (ft)8.0 9,688
Glazing and Doors U-Factor X Area = UA
Instructions
0.280 138 38.64
Skylights U-Factor X Area = UA
Instructions 0.50 0 ---
Insulation
Attic U-Factor X Area = UA
Instructions 0.026 877 22.80
Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA
Instructions ---0 ________
Above Grade Walls (see Figure 1)U-Factor X Area UA
Instructions 0.056 987 55.27
Floors U-Factor X Area UA
Instructions 0.025 1,211 30.28
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 0.303 ---
Slab on Grade (see Figure 1)F-Factor X Length UA
Instructions --- ________
Location of Ducts
Instructions Duct Leakage Coefficient
1.10
Sum of UA 146.99
Envelope Heat Load 6,761 Btu / Hour
Sum of UA X ∆T
Air Leakage Heat Load 4,813 Btu / Hour
Volume X 0.6 X ∆T X .018
Building Design Heat Load 11,574 Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load 12,732 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 15,915 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
This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code (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.
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.
Stevens St Fourplex
STEVENS AVE
YELM, WA 98597
Josh Snodgrass
360-528-0513
josh@revivalarchitects.com
Above Grade
Below Grade
Figure 1.
All Other Systems Heat Pump
(07/01/13)