New Construction in Columbia If you're planning to build the home of your dreams, why not install the most economical and luxurious heating and cooling system on the market today? A recently constructed house comes with a certain peace of mind that's unmatched among formerly owned homes. Owning a WaterFurnace geothermal system can transfer that peace of mind to your heating and cooling system as well. Combining a geothermal system in your newly constructed home means you can roll the cost into your monthly mortgage payment. Your savings in operating costs will typically offset the increase in mortgage payment - which means you may see a positive cashflow!