I heat my home using a forced air furnace, and it has both pluses and minuses. The furnace is extremely efficient at keeping my home nice and warm on the coldest days and nights. It is usually quite energy efficient. The gas furnace comes with a 98% AFUE rating which keeps my monthly utility bills reasonable. Because it is a forced air system, many of the components are shared between the furnace as well as the air conditioner. I like that I am able to enjoy both heating and cooling and keep a comfortable indoor environment month in month out. The furnace is low in maintenance, requiring only monthly clean changes and yearly professional assistance. However, I am not happy that I need to sacrifice so much space to oblige ductwork. The ductwork is loud, hides contaminants and causes a great deal of energy waste. I frequently need to have the duct system inspected for possible cracks, holes or rust. Because it is a forced air system, the air is blown within the house and may introduce lots of contaminants, such as dust, dander together with bacteria. It definitely causes complications with the cleanliness and health of my breathing air. The heat within the furnace tends to rise straight to the ceiling. This forces excessive thermostat settings, which leads to raised monthly energy bills. It also causes drafts, cold spots, and uncomfortable temperature swings at home. The furnace will probably last around fifteen years, whereas other designs of heating equipment provides an upwards of thirty years. Overall, I am happy to have a gas furnace for heating and am content with the value of my investment.