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# Room by Room vs. Total Structure heat loss question

Member Posts: 104

I have a question about the relationship between a heat loss calculation for a structure versus a room-by-room heat loss calculation. How do the two relate if placed side by side? I have done a heat loss calculation for my structure, but in order to proceed with how I want to design my system, I need to do a room-by-room... I am sort of stuck. How do I treat the interior walls in my calculation? If someone could provide a simple example, that might help. I did all my structure calculations long hand, so I am not intimidated by the math. Hope this isn't too rudimentary of a question to ask... Thanks in advance.

• Member Posts: 2,917
They are "warm partitions", kind of a non-issue save for their value in determining room size.
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• Member Posts: 9,514
The relationship should be the same as far as total heat loss.
The difference is each room will have different loads depending on outside wall exposure ( 1 side, two sides, and three sides exposed), orientation,glazing and solar influence.

There is cold partitions also. Such as a room next to a unconditioned space. Usually a wall between an attatched garage.
• Member Posts: 3,086
edited January 2016
Simple if you want to do them.

How to find heat loss through a panel

(Ti-To)/R-Value = Bthu/hr per sqft

Ti = Design Temp Inside the panel room
To = Design Temp Outside the panel room
R-Value = R-Value of the Panel

(70-0)/19 = 3.68 btu/hr per sqft of panel

This is just the loss through the panel.
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