New Construction in Hattiesburg So, you have your dream house plans completed and ready for construction? Did you think about what will condition your house? Why not include the most efficient heating and cooling units on the market. Your recently constructed house represents your pride of ownership and only the best will do. By installing a WaterFurnace geothermal system in your Hattiesburg home, you include your heating and cooling system in that feeling of new home ownership as well.