Every Furnace Manufacturer like every Car Maker has a number of options in their line. These options have a wide range in price due to their features. Just as you would never buy a car without knowing it’s Model and features, be sure you know the Model of the furnace being proposed and don’t settle for a “Deluxe” or “Premium” model. After you have the complete model number of the furnace be sure to visit the Manufacturers’ website and do your research.