Table 5. South Region Building Code Characteristicsa
| Characteristic | MEC95 Compliant | MEC95 + 30 % | MEC95 + 40 % | MEC95 + 50 % | ||||
| Efficiencyb | Costc | Efficiency | Cost | Efficiency | Cost | Efficiency | Cost | |
| Heat Pump | 10.0/6.8 | 4,100 | 15.5/9.4 | 5,500 | 15.5/9.4 | 5,500 | 15.5/9.4 | 5,500 |
| Roof Insulation | R-20 | 1,116 | R-27 | 1,382 | R-27 | 1,382 | R-50 | 2,413 |
| Wall Insulation | R-11 | 706 | R-11 | 706 | R-13 | 826 | R-15 | 974 |
| Windows | U-.48 | 924 | U-.48 | 924 | U-.48 | 924 | U-.29 | 2,200 |
| Slab Insulation | None | 0 | None | 0 | R-5.2 | 564 | R-5.4 | 1,486 |
| Air Infiltration | 0.63 | 157 | 0.63 | 157 | 0.63 | 157 | 0.63 | 157 |
| Total Cost | 7,004 | 8,670 | 9,353 | 12,730 | ||||
| Incremental Cost | -- | 1,666 | 2,230 | 5,726 | ||||
| aColumbia, SC, 1,800 square feet, built on slab. bEquipment efficiencies are given in SEER (Seasonal Energy Efficiency Rating) and HSPF (Heating Seasonal Performance Factor) for heat pumps and as AFUE (Annual Fuel Utilization Efficiency) and SEER for gas furnaces and central air conditioners. cAll costs given in 1998 dollars. Sources: Cost data from Ernest Orlando Lawrence Berkeley National Laboratory, Energy Data Sourcebook for the U.S. Residential Sector (September 1997), and Energy Information Administration, Technology Forecast Updates: Residential and Commercial Building Technologies--Reference Case, prepared by Arthur D. Little, Inc. (Washington, DC, September 1998). | ||||||||