A tune-up will make the furnace work more efficiently. It will even help recover some of the lost system efficiency. Consequently, your space will be more comfortable without any steep rise in energy bills. According to the Indoor Air Quality Association (IAQA), regular annual maintenance can help you save approximately 30% on gas expenses.
Furthermore, IAQA also says routine furnace maintenance will reduce the chances of repair by roughly 95%. So you can rest in the knowledge that your system will not leave you high and dry when you need it the most. Also, imagine the peace of mind you get when you know your system will not take you on a merry chase of expensive repairs. Suffice to say, maintenance will help avoid a majority of the avoidable furnace issues.
Above all, if your furnace is a new purchase, the annual maintenance regime by professional HVAC contractors will keep its warranty intact. This relatively inexpensive activity will save the day when faced with a major component failure.