| configuration |
framing
cost/(linear ft stnd. wall) |
insulation
cost/(linear ft stnd. wall) |
total
Materials Cost |
Rave |
Q Fairbanks |
| [$/ft] |
[$/ft] |
[$/ft] |
[hr-sqft-F°/BTU] |
[BTU/(year-ft) |
| 2x6 wall |
10.3 |
3.4 |
13.7 |
17.1 |
156968.4 |
| 2x6 wall w/
2x2 and 1.5" batting |
11.8 |
4.6 |
16.4 |
21.8 |
123126.6 |
| 2x6 wall
with 1.5" exterior polystyrene |
11.2 |
9.8 |
21.0 |
22.9 |
117212.2 |
| 2x6 wall
with 2" exterior bluefoam |
12.2 |
15.7 |
27.9 |
27.1 |
99046.5 |
| 2x6 wall
with 4" exterior bluefoam |
12.7 |
28.1 |
40.8 |
37.1 |
72349.3 |
| double 2x4
wall |
14.7 |
5.9 |
20.6 |
29.0 |
92557.2 |
|
| configuration |
Heating fuel |
heating Cost |
Above
Standard 2x6 materials Cost |
Fuel Savings |
Cost of fuel
savings |
Years to
recoupe additional materials cost |
| [Gal/(year-ft)] |
[$/(year-ft)] |
[$/(year-ft)] |
[Gal/(year-ft)] |
[$/(year-ft)] |
years |
| 2x6 wall |
1.6 |
4.8 |
0.0 |
0.0 |
0.0 |
0.0 |
| 2x6 wall w/
2x2 and 1.5" batting |
1.3 |
3.8 |
2.8 |
0.3 |
1.0 |
2.6 |
| 2x6 wall
with 1.5" exterior polystyrene |
1.2 |
3.6 |
7.3 |
0.4 |
1.2 |
6.0 |
| 2x6 wall
with 2" exterior bluefoam |
1.0 |
3.0 |
14.2 |
0.6 |
1.8 |
8.0 |
| 2x6 wall
with 4" exterior bluefoam |
0.7 |
2.2 |
27.1 |
0.9 |
2.6 |
10.4 |
| double 2x4
wall |
0.9 |
2.8 |
6.9 |
0.7 |
2.0 |
3.5 |
|
Physics 212 Web Project,
Design by David Dickson