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Number of Zones
Zone heating is an increasingly popular way to save on energy costs, particularly in the Northeast. Zone heating means having a separate heating unit for different parts of your home or using a single furnace with mechanical dampers that allow you to direct heat to specific "zones" in your home. That way you can heat only the rooms you use and keep the other rooms 10 to 20 degrees colder.
HVAC professionals estimate that zone heating can save the average homeowner 20 to 30 percent on their heating bill. However, zone heating is not without potential problems. As with anything mechanical, dampers can malfunction, the thermostat can be calibrated wrong and the cooler rooms may be set at a temperature that threatens to freeze pipes during a cold night.