New Construction in Port Washington So you have the plans to build your dream home. Why not include the most efficient, high-end heating and cooling unit available on the market in your plans. Recently built homes come with a satisfaction in ownership that previously-owned houses cannot rival. By installing a WaterFurnace geothermal system in your Port Washington home, you transfer that feeling to include your heating and cooling system. Combining a geothermal system in your recently constructed home means you can pass 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!