Enfinity™ vertical water source heat pumps help simplify the design and installation of high-efficiency geothermal or boiler/tower systems. Standard range (55º F to 110º F) and extended range/ geothermal (25º F to 110º F) models are available in 1/2- to 5-ton capacities. Units sized from 19,000 to 60,000 Btuh use environmentally friendly HFC R-410a refrigerant with no ozone-depleting properties.