Welcome to Ground Source Systems, Inc.'s Western Montana geothermal resource center. We're proud to be a full-service provider of geothermal products for the Western Montana area. Whether you need standard maintenance, equipment repair, or an entire comfort system - Ground Source Systems, Inc. has the qualifications and skills you need. Let us provide you a solution that uses the clean, renewable energy in your backyard to give you savings up to 70% on heating, cooling and hot water.