The Aquaforce liquid chillers are the premium solution for industrial and commercial applications where installers, consultants and building owners require optimal performances and maximum quality.To meet to all environmental and economic requirements, the 30XW is available in three efficiency classes: - Standard efficiency 30XW-S units that offerings excellent quality with superior cost advantage, designed to maximize savings, it's the cost-effective choice, suitable for comfort cooling of hotels, office and industrial settings.- High-efficiency 30XW-P units that offer unequalled energy efficiency to satisfy the most stringent demands of building owners wanting to reduce operating costs to the minimum.- Medium-efficiency 30XW units that offer an optinized balance of technical and economical aspects, while at the same time boasting superior energy efficiency.- Single refrigerant R134a.