New Construction in Williamsport So you have the plans to construct your dream home. Why not include the most dynamic, luxurious heating and cooling unit available on the market in your plans. Newly constructed homes come with a pride of ownership that previously-owned houses cannot match. By adding a WaterFurnace geothermal system in your Williamsport home, you extend that feeling to include your heating and cooling system. Including a geothermal system in your newly built home means you can roll the cost into your monthly mortgage payment. The money you save in operating costs will most likely offset the increase in mortgage payment - which means you may see a positive cashflow!