If you have the new model furnace, you can easily see the efficiency of your furnace from the provided rating on annual fuel utilization efficiency. Many people do not remember to check for this rating. This rating is able to inform you of how much heat is produced in correspondence to the amount of energy that it produces. The new furnace has this mark apart from the very old ones. It is important to change to the newer model if you want to watch your energy consumption. Some of the obvious signs that you need to do a replacement include this page here.
If you notice that is a change in the energy bills in your home, which increases rapidly. If the gas and electric bills keep rising than usual, then it is time. When you cannot give an account of where the increase is coming from, then its time for a change. There are some times when the energy prices rise, and that is understood, but when it progresses beyond the norm, then you need to watch out. It means that for it to function in the same capacity, it has to use more energy. If it has been in operation for the last fifteen years, then you need to think again more about. Twenty years is the maximum years that a furnace can be running. If it is within this range, then there needs to be a change. You will save so much resources when you get a new furnace.
You should also watch out for any abnormal noise that the furnace would make. If you hear some popping and rattling sounds from the furnace, there could be an age issue and needs replacement. It has completed its functional period, which constitutes the lifespan. Again, if you find yourself doing many repairs within a short time then there is need to get a new one. This happens because the furnace is gaining, and nearly all parts are failing, and so you may not be able to repair all of them since some of the parts may not be found in the market. Instead of spending resources on the repair parts it would be wise to save the money and top up and buy a new one that will not have such needs. It shows that life is coming to an end for the specific furnace having served for that long. The last sign is when it does not moisturize and cleanse the air when heating, which shows that it is not efficient for that work. You need a new one to correct that problem for good.