Furnaces are more efficient and provide more consistent coverage of your home due to some interesting improvements in how they produce heat and move the air in your home. These newer systems are much more efficient then past systems and can save you a lot of money over time.
Heating is now accomplish by using a 75 volt bulb that makes the furnace function more like a conventional oven. This improves the efficiency of the unit as it takes less energy to produce a constant heat then it does to cool, then reheat air.
Also, most quality modern furnaces have a variable speed blower. These blowers help with hot & cold spots and reduces the amount of air born materials in your air by running constantly and at lower speeds. There are non of the sudden spikes of air to stir up dust. However an added bonus is that more air is constantly passing through your furnace filter or being pushed past you UV, HEPA, or Media Air Cleaner systems improving there effectiveness further. Even inline humidifiers benefit from this type of system.
Finally, as variable speed blowers are not constantly starting and stopping through out the day you will encounter fewer break downs. All these benefits equal improved saving and better health for you and your family down the road.
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