Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I don't believe it is possible to exclude air film resistances from an EnergyPlus simulation. If you're trying to match the U-Factor with Film to a particular value, you can subtract the air film resistances from your target R-value to determine the R-value needed in your construction materials. The air film resistances are taken from ASHRAE Fundamentals, shown below. The exterior air film is R-0.17, and the interior is R-0.61 for roofs/floors or R-0.68 for walls (IP units).
| | 2 | No.2 Revision |
I don't believe it is possible to exclude air film resistances from an EnergyPlus simulation. If you're trying to match the U-Factor with Film to a particular value, you can subtract the air film resistances from your target R-value to determine the R-value needed in your construction materials. The air film resistances are taken from ASHRAE Fundamentals, shown below. The exterior air film is R-0.17, and the interior is R-0.61 for roofs/floors or R-0.68 for walls (IP units).
