| CW01 | Concrete control sample |
| CW02 | Concrete with fly ash and chopped PET |
| CW03 | Concrete with fly ash and sawdust |
| CW04 | Concrete with fly ash and granular polystyrene |
| φ | Heat flux [W/m2] |
| Tx | Thermocouple sensors |
| Q | Heat gain of the wall [W] |
| k | Thermal conductivity [W/mK] |
| A | Area [m2] |
| ∆T | Temperature difference [°C] |
| d | Width [m] |