| Single Cross flow | Double Cross flow | |
| Strengths | • Simple, lower cost (small scale) • Better for tight, one-sided spaces • Easier freeze protection | • High capacity in compact length • Better airflow symmetry • Lower height profile • Economical at large scale |
| Weaknesses | • Limited capacity per length • Can have uneven airflow • Not optimal for very large duties | • Requires more width • Higher freezing risk (2 sides) • Slightly higher fan power • Risk of water distribution imbalance |
