Guido Sigrist AG

Besides the air-to-water heat pump, Guido Sigrist AG also installs ground-source and water-source heat pumps as well as heat pump water heaters. Before installation, the company checks the property's heat distribution and insulation. Everything runs through one company, from planning to any wall penetrations needed for air units to the finished system; for ground-source and water-source heat pumps, the company also handles the drilling permit. It advises on possible subsidies and helps with the application.

Guido Sigrist AG has been around since 1982 and covers not just heating but also plumbing, bathrooms, wood and pellet heating, and solar systems. It works throughout the Zürcher Unterland, including the Wehntal, and in the city of Zürich. The company is a member of the Fachvereinigung Wärmepumpen Schweiz.