Material Selection:
- Heat Transfer Tubes: Stainless steel / Copper
- Fins: Stainless steel / Copper / Tin-plated copper / Aluminum
- Frame: Galvanized steel / Stainless steel
- Structural Frame: Hot-dip galvanized carbon steel
- Fan Cover: Hot-dip galvanized carbon steel
- Fan Blades: Stainless steel / Aluminum alloy