Design Heat Loss Report

General

Date of Reporting:
12/8/2023
Date of Rating:
11/28/2023
Client:
Pilgrim Hot Springs
Home Address:
Kougarok Rd
Home City:
Nome, AK 99762
AkWarm File Name:
C:\Users\mcoakley\Desktop\PHS_NunsQuarters-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 FloorHouse85626.831.90.03,067
Above grade WallNorth Wall29714.520.00.01,922
Above grade WallSouth Wall29714.520.00.01,922
Above grade WallWest Wall35314.523.80.02,284
Above grade WallEast Wall35314.523.80.02,284
External DoorMain Door186.32.70.0257
WindowWindow 1 South151.110.30.0985
WindowWindow 2 South122.24.60.0440
WindowWindow 3 South181.112.30.01,182
WindowWindow 1 North151.110.30.0985
WindowWindow 2 North91.16.20.0591
WindowWindow 3 North91.16.20.0591
WindowWindow 4 North151.110.30.0985
WindowWindow 5 North181.112.30.01,182
WindowWindow 1 West151.110.30.0985
WindowWindow 2 West122.24.60.0440
WindowWindow 1 East151.110.30.0985
WindowWindow 2 East51.13.40.0328
Cathedral CeilingHot Roof48921.822.40.02,154
Ceiling with AtticCold Roof44936.612.30.01,180

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:
122
cfm
Total Ventilation:
122
cfm
0.61
ACH

Heat Loss per deg F:
132
Btu/hr/deg-F
Heat Loss from Air Leakage/Ventilation:
12,662
Btu/hour

Total Design Heat Loss for Main Home

Home Shell Components:
24,751
Btu/hour
Air Leakage + Mechanical Ventilation:
12,662
Btu/hour
Loss to Garage:
0
Btu/hour
Heating System Distribution Loss (100% efficiency):
0
Btu/hour
Required Heating System Output:
37,413
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 Home37,41341,15444,89648,637

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