Level 9 Heating & Cooling provides furnace installation in Des Peres, MO, and the surrounding communities. When you need fast, efficient service, you can count on our experienced furnace technicians. We have decades of experience and are proud to serve St. Louis County. We’ll provide honest recommendations on whether furnace replacement is the right choice for your family. If your existing furnace has outlived its useful life or you have recently built a new home, our licensed professionals can come take the necessary measurements so that you choose the right size unit for the space and your personal needs.