It's highly unlikely that your unit will last 30 years before it needs to be replaced; however, if you follow a regular preventive maintenance routine and operate it properly, your chances of keeping the same unit for about 15 years increase considerably. Check out our tips on how to do this. With proper maintenance, gas ovens usually last 20 to 30 years or even longer. A furnace is usually replaced when the heat exchanger starts to leak, as it is one of the most critical and expensive components.
Poorly maintained or questionable quality systems can last as little as 10 years, while oil furnaces usually only last 10 to 15 years due to maintenance problems caused by inefficient fuel. Air conditioners can last between 10 and 15 years, depending on several factors, while air conditioning systems can even last up to 30 years before needing to be replaced. HVAC technology has come a long way, and your home's energy efficiency is affected simply by keeping older HVAC technology. So it's time to think about a replacement, yes, even if it “continues to work well”.
Many utility companies will offer you discounts on air conditioning systems when you're ready to upgrade your air conditioning system to a model that save energy. What most homeowners don't know is that, even with a newer, energy efficient HVAC system, if your home isn't properly insulated or professionally sealed, the lifespan of your HVAC system is automatically shortened. For this reason, most HVAC technicians will recommend replacing any HVAC system that is 15-20 years old with a newer, more efficient model.