Zone systems - What are they? An HVAC zoning system allows you to heat or cool different parts of your home separately instead of using one thermostat for the whole house. Each zone has its own thermostat and uses dampers in the ductwork to send air only where it’s needed. For Minnesota homes, where winter temperatures can swing fast and summer heat can hit upstairs hard, zoning gives you better control and comfort year-round. Many Minnesota homes deal with uneven temperature