CalStar Brick performance versus clay brick and concrete brick (at a glance), based on modular size:
| Brick Type | Calstar Brick | Clay Brick | Concrete Brick |
|---|---|---|---|
| Embodied energy | 1000 BTU | 6000 BTU | 1100 BTU |
| CO2 | 0.1 lb | 0.9 lb | 0.7 lb |
| Recycled material | 40% | 7% | Not typical |
| Dimensional consistency | Very consistent | Varies (based on firing) |
Very consistent |
| Initial Rate of Absorption (1 – 14 g/30in”/min) |
2 | 2 – 30 | > 25 |
| Pigments | Mostly | Mostly | Mostly |
Source: The Construction Specifier