Design Heat Loss Report

General

Date of Reporting:

1/4/2024

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-Base.hm2

Temperatures / Wind Speed

Indoor Temperature:

deg F

Design Air Temperature:

-26

deg F

Deep Ground Temperature:

deg F

Garage Temperature:

deg F

Airport Design Wind Speed:

1.8

mph

Main Home Heat Loss

Heat Loss from Shell Components

Shell Component Type	ID Name	Net Area, sq. ft.	Total R-Value	UA to Air, Btu/hr/deg-F	UA to Ground, Btu/hr/deg-F	Design Heat Loss, Btu/hour
Above grade Floor	Floor	314	3.9	80.4	0.0	7,730
Above grade Wall	South	82	0.9	60.7	0.0	5,838
Above grade Wall	West	82	0.9	60.7	0.0	5,838
Above grade Wall	North	82	0.9	60.7	0.0	5,838
Above grade Wall	East	82	0.9	60.7	0.0	5,838
External Door	House	19	7.5	2.4	0.0	231
Window	1	9	2.4	3.2	0.0	310
Window	2	9	2.4	3.2	0.0	310
Window	3	9	2.4	3.2	0.0	310
Window	4	9	2.4	3.2	0.0	310
Ceiling with Attic	House	383	2.7	140.1	0.0	13,468
Total		1,081		478.8	0.0	46,024

Heat Loss due to Natural Air Leakage and Mechanical Ventilation

Mechanical Ventilation Flow, Unbalanced

cfm

Effective Mechanical Ventilation:

cfm

Mechanical Ventilation Heat Recovery Effectiveness:

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:

46,024

Btu/hour

Air Leakage + Mechanical Ventilation:

1,618

Btu/hour

Loss to Garage:

Btu/hour

Heating System Distribution Loss (100% efficiency):

Btu/hour

Required Heating System Output:

47,642

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/hour	No Safety Margin	10% Safety Margin	20% Safety Margin	30% Safety Margin
Primary System serving Main Home	47,642	52,406	57,170	61,934

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