As the title says, a WaterFurnace series 7 ground source heat pump that replaced the existing geothermal system in the home. We upgraded the home to a 3 zone intellizone 2 system as well as a variable speed flow center. The video shows off some of the features of this 5.3COP and 41EER 14 stage of heating and 12 stage of cooling system. This thing is as quiet as you would expect it to be and is around the noise level of a ductless heat pump.