When specifying or replacing a commercial chiller, one of the first decisions is air-cooled vs. water-cooled. Each type has meaningful trade-offs in efficiency, maintenance, installation cost, and space requirements.
Air-Cooled Chillers
Air-cooled chillers reject heat directly to outdoor air through condenser coils and fans. They are simpler, require no cooling tower, and are easier to maintain.
- Best for: smaller buildings, sites without cooling tower space, buildings without existing condenser water piping
- Efficiency: typically 0.5-0.8 kW/ton
- Limitations: reduced efficiency in high ambient temperatures, noisy
Water-Cooled Chillers
Water-cooled chillers reject heat to a cooling tower via condenser water. They are more efficient but require additional infrastructure.
- Best for: large buildings, facilities with existing cooling towers, applications requiring maximum efficiency
- Efficiency: typically 0.3-0.5 kW/ton
- Limitations: requires cooling tower, water treatment program, and additional maintenance