With proper maintenance, the lifespan of an average standard-efficiency furnace is around 25–30 years. A high-efficiency furnace lasts for approximately 20–25 years. If your home is older, make sure to monitor your furnace’s performance. Some signs you may need your furnace replaced: delayed ignition, significant amounts of corrosion, little or no heat produced, odd smells (like sulfur or rotten eggs) & consistent pilot light failures. If you suspect you may need your furnace replaced, contact Orzech Heating & Cooling. We’ll assess whether or not we can and should repair your furnace or replace it with a new one.