Five Things That Can Affect Your Furnace’s Efficiency Levels

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It is essential to have an efficient heating and cooling system to keep your home comfortable. However, your furnace will lose efficiency with time. 

If your house is not staying warm, it could be because the furnace has lost enough of its heating efficiency to heat the entire home. Pay attention to the following five aspects that can affect furnace efficiency levels: 

Factors That Affect Your Furnace's Efficiency Levels.

  • Lack of Maintenance

Ignoring or postponing maintenance is most likely the primary cause of your furnace’s decreased efficiency. The most important thing you can do to keep your furnace running efficiently and save money on energy costs is to have routine furnace maintenance performed.

Regular maintenance ensures that the system has worked smoothly and optimally for decades. Prolonged maintenance schedules exacerbate typical minor issues, needing major repairs or replacements.

  • Thermostat Settings

The thermostat setting is another aspect that might impact the effectiveness of your furnace. If you set your thermostat too low, your furnace will have to work more to keep the temperature stable. It can increase your energy expenses and shorten the lifespan of your furnace. 

That is why it is essential to set your thermostat to a comfortable temperature and to avoid adjusting it too frequently.

  • Age of Your System 

The age of your heating unit also affects its efficiency. The average lifespan of a furnace is between 10 to 15 years. If your furnace is over ten years old, it probably consumes more electricity. Professionals should inspect units older than ten years to verify their efficiency. 

Our trustworthy HVAC contractor in Minneapolis can determine whether your system is operating optimally or if you need to replace your older furnace. In some cases, replacing the unit is more cost-effective than repairing an old one.

  • Dirty Air Filter

A dirty filter is the most frequent reason for a furnace’s poor performance. Since most households don’t know that their filter needs to be changed frequently, they often use the same filter for months or even years. Your heating system’s energy efficiency will decrease unless the filter is changed regularly, and it could also injure you long-term and worsen the air quality in your house. 

Replace your air filter once a month. Depending on the type of filter, your system, and the environment in your home, you may need to change it more or less frequently. 

  • Leaky Ductwork 

Leaking ductwork is another factor that can decrease the efficiency of your furnace. If your ducts have leaks, gaps, or poor connections, your system will struggle to carry air throughout your home. Even if your furnace is working overtime, you may not be as comfortable as you expect.

Make your home as sealed as possible so that the furnace does not have to work harder to maintain a constant temperature, wasting energy.


All these factors can affect the efficiency level and lifetime of your furnace. Heating and cooling systems are responsible for over half of your home’s energy use, so having an efficient furnace is vital. 

If your furnace needs to be fixed or you are looking for a reliable maintenance service, contact I Heart Aamna. We will send an Amana heating and air expert to inspect your furnace’s performance and correct any problems.

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