Table 6. North Region Building Code Characteristicsa
| Characteristic | MEC95 Compliant | MEC95 + 30 % | MEC95 + 40 % | MEC95 + 50 % | ||||
| Efficiencyb | Costc | Efficiency | Cost | Efficiency | Cost | Efficiency | Cost | |
| Gas Furnace/CAC | 78/10.0 | 3,850 | 95/16.0 | 5,450 | 95/18.0 | 565 | 95/18.0 | 5,650 |
| Roof Insulation | R-31 | 1,011 | R-60 | 1,788 | R-60 | 1,788 | R-60 | 1,788 |
| Wall Insulation | R-15 | 1,510 | R-27 | 4,035 | R-27 | 4,035 | R-27 | 4,035 |
| Windows | U-.48 | 1,319 | U-.48 | 1,319 | U-.30 | 2,195 | U-.25 | 3,793 |
| Floor Insulation | R-15 | 722 | R-15 | 722 | R-15 | 722 | R-21 | 914 |
| Air Infiltration | 0.56 | 333 | 0.56 | 333 | 0.56 | 333 | 0.40 | 713 |
| Total Cost | 8,745 | 13,648 | 14,723 | 16,894 | ||||
| Incremental Cost | -- | 4,902 | 5,978 | 8,148 | ||||
| aChicago, IL, 2,240 square feet, two-story, unheated basement. 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). | ||||||||