Profile: John J Sheridan Wholesale is engaged in the supply of geothermal and water source heat pumps. Our Aquazone™PT series raises the bar for water-source heat pump efficiencies and uses Puron® HFC-410A zero ozone depletion refrigerant, making it environmentally-friendly. Our geothermal heat pumps are designed without the need for a boiler or cooling tower and save substantial energy costs & space. We also offer water-to-water and indoor water-cooled heat pump units for geothermal applications including tempering ventilation air and hydronic applications.