how do I do a heat loss,and how do I figure out the unit out put

Bob Bona_4

A '20's balloon frame house has a radically different infiltration rate than a 1990 colonial.

Do the heat loss calculation.

G Waite

heat loss

How do I perform a heat loss test. How do I figure out the amount of btus I will need?

[Deleted User]

google for

slantfin heatloss explorer 2

Cam_2

20 btus sq/foot is a good place to start

for cooling sq/ft x 15 divided by 12,000 nice rules of thumbs, you will be close every time!

The Steam Whisperer (Formerly Boilerpro)

No Way is right....

Example: My own home, 1906 2800 sq ft two story, 700 sq ft of windows, Northern Illinois:

Heating (based on ASHRAE)
As built, about 40 btu/sq ft, Upgraded about 15 btu/sq ft.

Cooling (based on ASHRAE)
Upgraded, 10 btu/sq ft, actual, 7 btu/sq ft



With "Rules of Thumb", you might as well cut your thumb off. At least use some sort of abbreviated heating calculation such as that published by Weil Mclain, or a more detailed method based on ASHRAE such as Slant Fin's.


Boilerpro





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