We're Mendham's Primary Geothermal Contractor! Mendham, New Jersey, homeowners have all sorts of reasons for wanting a geothermal heating and cooling system: remarkable comfort all year – no matter how crazy the seasonal variations stable operating performance energy performance (They’d be hard-pressed to find a more "green," more natural way to heat and cool their homes!) significant – often amazing – savings on their energy bills superior installation and service from Perfection Contracting, Inc., Mendham's geothermal experts. Discover more about what a geothermal heating and cooling system can do to increase your family's comfort. Check out our Geothermal Savings Calculator. Then contact Perfection Contracting, Inc.. We sell, install, and maintain WaterFurnace geothermal systems, the very best available today.