TTHERM GEO™ is designed with your comfort in mind. Our line of superior geothermal equipment comes with cold climate design and ultimate reliability as the standard. If you live in a northern climate and want a heat pump you can depend on to keep your family warm all winter, TTHERM GEO™ is for you! TTHERM GEO™ has a broad line of single and two-speed geothermal heating, cooling, and hydronic units available for residential and commercial applications. When comfort matters, look to TTHERM GEO™.