New Construction in Dallas So you have the plans to build your dream home. Why not include the most economical, high-end heating and cooling unit available on the market in your plans. Newly built homes come with a satisfaction in ownership that previously-owned houses cannot beat. By installing a WaterFurnace geothermal system in your Dallas home, you extend that feeling to include your heating and cooling system. Adding a geothermal system in your recently constructed 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!