Systems with direct expansion refrigerant gases
- With constant flow (Split type units)
- With variable flow (Variable Refrigerant Volume type systems)
All-air systems
Only treated air from the UTAs (air conditioners) or compact ROOFTOP type units / Vertical or horizontal compact units reach the premises.
Air-water systems
The chilled/heated water is sent to the premises to the terminal units and the centralized unit is cooled by air.
Water-to-water systems
Chilled/heated water is delivered to the premises, and the centralized unit is cooled by water. This system is the most energy-efficient and also tends to have the highest investment cost.