In the survey model, the sum of all 9 (the report shows seven, combining brick and concrete as well as glass) material
categories is multiplied by a factor of 1.4. As the ACHP report explains,
"The surveyed materials account for about 50% of the total embodied energy of building construction. The surveyed materials
do not include 'misc. plastics; paving; non-ferrous wire; mechanical, plumbing, and electrical equipment and fixtures;
sheet metal work; metal doors and plate work; misc. and architectural metalwork.' and many other items which do not,
individually, contribute significantly to the total embodied energy." In the survey model, materials account for 70%
of the total embodied energy. The energy used in construction--floor area multiplied by the invested construction energy--is
added to the energy invested in materials in the final calculation. The values for each building type are presented
to the right, with the values for materials below, as published in the ACHP report.
| Energy Embodiment of Primary Materials |
| Material Category | Embodied Energy per
Material Unit |
| Wood Products | 9000 BTU/BDFT |
| Paint Products (450sf/gal.) | 1000 BTU/sq. ft. |
| Asphalt Products | 2000 BTU/sq. ft. |
| Glass Products: Windows | 15000 BTU/sq. ft. |
| Glass Products: Plate | 40000 BTU/sq. ft. |
| Stone & Clay Products: Concrete | 96000 BTU/cf |
| Stone & Clay Products: Brick | 400000 BTU/cf |
| Primary Iron & Steel Products | 25000 BTU/lb |
| Primary Non-Ferrous Products | 95000 BTU/lb |
|
|
| Energy Embodiment of Construction |
| Building Construction Type | MBTU/sq.ft. |
| Residential – Single Family | 90 |
| Residential – 2-4 Family | 100 |
| Residential – Garden Apartment | 120 |
| Residential – High Rise | 150 |
| Hotel/Motel | 250 |
| Dormitories | 330 |
| Industrial Buildings | 100 |
| Office Buildings | 360 |
| Warehouses | 80 |
| Garages/Service Stations | 150 |
| Stores/Restaurants | 220 |
| Religious Buildings | 260 |
| Educational | 270 |
| Hospital Buildings | 350 |
| Other Nonfarm Buildings | 310 |
| a. Amusement, Social & Rec. | 300 |
| b. Misc Nonresidential Bldg. | 240 |
| c. Laboratories | 450 |
| d. Libraries, Museums, etc. | 380 |
| Farm Residences | 70 |
|
