Design Heat Loss Report

General

Date of Reporting:
2/22/2024
Date of Rating:
2/22/2024
Client:
Pilgrim Hot Springs
Home Address:
Home City:
, AK
AkWarm File Name:
C:\Users\mcoakley\Desktop\PHS_ChangingRoom.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 WallHouse16211.313.80.01,327
Above grade WallHouse10811.39.20.0884
Above grade WallHouse5511.34.70.0455
Above grade WallHouse5511.34.70.0455
Above grade FloorHouse1365.823.30.02,242
Cathedral CeilingHouse11921.05.70.0548
WindowSkylight 2121.46.50.0622
WindowSkylight 1121.46.50.0622
WindowHouse43.01.10.0105
WindowHouse43.01.10.0105
External DoorChanging Room182.65.90.0567
External DoorChanging Room182.65.90.0567
External DoorHouse152.65.10.0491

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:
5.1
cfm
Total Ventilation:
5.1
cfm
0.27
ACH

Heat Loss per deg F:
5.6
Btu/hr/deg-F
Heat Loss from Air Leakage/Ventilation:
534
Btu/hour

Total Design Heat Loss for Main Home

Home Shell Components:
8,988
Btu/hour
Air Leakage + Mechanical Ventilation:
534
Btu/hour
Loss to Garage:
0
Btu/hour
Heating System Distribution Loss (100% efficiency):
0
Btu/hour
Required Heating System Output:
9,521
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 Home9,52110,47311,42512,378

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