Design Heat Loss Report

General

Date of Reporting:
1/11/2024
Date of Rating:
1/4/2024
Client:
Pilgrim Hot Springs
Home Address:
Kougarok Rd
Home City:
Nome, AK 99762
AkWarm File Name:
C:\Users\mcoakley\Desktop\PHS_Igloo-Retro.hm2

Temperatures / Wind Speed

Indoor Temperature:
70
deg F
Design Air Temperature:
-26
deg F
Deep Ground Temperature:
31
deg F
Garage Temperature:
55
deg F
Airport Design Wind Speed:
1.8
mph

Main Home Heat Loss

Heat Loss from Shell Components

Shell Component TypeID NameNet Area, sq. ft.Total R-ValueUA to Air, Btu/hr/deg-FUA to Ground, Btu/hr/deg-FDesign Heat Loss, Btu/hour
Above grade FloorFloor3148.039.10.03,756
Above grade WallSouth824.616.40.01,572
Above grade WallWest824.616.40.01,572
Above grade WallNorth824.616.40.01,572
Above grade WallEast824.616.40.01,572
External DoorHouse197.52.40.0231
Window192.43.20.0310
Window292.43.20.0310
Window392.43.20.0310
Window492.43.20.0310
Ceiling with AtticHouse3835.668.70.06,605

Heat Loss due to Natural Air Leakage and Mechanical Ventilation

Mechanical Ventilation Flow, Unbalanced
0
cfm
Effective Mechanical Ventilation:
0
cfm
Mechanical Ventilation Heat Recovery Effectiveness:
0
%
Natural Air Leakage at Design Conditions:
15.6
cfm
Total Ventilation:
15.6
cfm
0.34
ACH

Heat Loss per deg F:
16.8
Btu/hr/deg-F
Heat Loss from Air Leakage/Ventilation:
1,618
Btu/hour

Total Design Heat Loss for Main Home

Home Shell Components:
18,121
Btu/hour
Air Leakage + Mechanical Ventilation:
1,618
Btu/hour
Loss to Garage:
0
Btu/hour
Heating System Distribution Loss (100% efficiency):
0
Btu/hour
Required Heating System Output:
19,739
Btu/hour

Required Heating System Output

The table below shows the amount of heat required to be supplied by the heating systems.

Required Output, Btu/hourNo Safety Margin10% Safety Margin20% Safety Margin30% Safety Margin
Primary System serving Main Home19,73921,71323,68725,661

If you need to determine the required Input Rating of the heating system, you must divide the Output Requirement by the efficiency of the system. For example, if the heating system is 85% efficient and the Output Requirement is 56,000 Btu/hour, the needed Input Rating is 56,000 Btu/hour / 0.85 = 65,900 Btu/hour