Another important aspect to combat the rise of gas furnace prices is to make sure that you buy a big enough furnace unit. This will be more expensive so keep your expenditures to a minimum and never buy a bigger unit than you require. You should also consider the total price when looking gas furnace costs. An example would be where a dealer or sales person charges extra money for an extended warranty that adds to the costs. A gas furnace that needs more maintenance more often will probably have a higher total gas furnace price than one with an initial higher cost, but which does not need any maintenance work being done. Always take into account all aspects before making a purchase.