Q: What does the Model Energy Code require for duct insulation?
A: The Model Energy Code was written by CABO with participation by BOCA, ICBO, SBCCI, NCSBCS. The following are the major requirements from the 1995 Model Energy Code:
|
Table 503.7.1 Minimum Duct Insulation |
|
Location |
Cooling |
Heating |
|
degree days (65F) |
R-value |
degree days (65F) |
R-value |
|
Outside |
<500 |
3.3 |
<1,500 |
3.3 |
|
500 to 1,150 |
5.0 |
1,500 to 4,500 |
5.0 |
|
1,151 to 2,000 |
6.5 |
4,501 to 7,500 |
6.5 |
|
>2,000 |
8.0 |
>7,500 |
8.0 |
|
Inside building envelope or in unconditioned space |
|
TD<=15 |
|
none |
|
none |
|
40>=TD>15 |
|
3.3 |
|
3.3 |
|
TD>40 |
|
5.0 |
|
5.0 |
