| ACS | Air conditioning system |
| ASHRAE | American society of heating, refrigerating and air-conditioning Engineers |
| BSSR | Back side solar reflectance at normal incidence |
| BSVR | Back side visible reflectance at normal incidence |
| CCR | Calcium carbide residue |
| CEB | Compressed earth block |
| Cp | Specific heat |
| e | Width (thickness) |
| FSSR | Front side solar reflectance at normal incidence |
| FSVR | Front side visible reflectance at normal incidence |
| g | Solar transmittance at normal incidence |
| HI | Hygrothermal index |
| OWC | Optimum water content |
| Uf | Thermal transmittance value on the windows’ frames |
| αs | Solar absorptivity value (solar absorptance) |
| αth | Thermal absorptivity value (emissivity of the material) |
| αv | Visible absorptivity value (visible absorptance) |
| ε | Front and back side infrared hemispherical emissivity |
| λ | Thermal conductivity |
| ρ | Density |
| τl | Visible transmittance at normal incidence |