7 Things to Know Before Purchasing a Furnace in Nashville

Buying a new furnace may not be a concern in the immediate future. But it’s smart to learn the things that will likely influence your choice when you’re ready to buy. Here are seven things you’ll want to consider when it’s time for furnace replacement in the U.S.

1. Size and Installation Quality 

To operate at maximum efficiency and comfort, your furnace must be correctly sized for your home. When it involves furnaces, bigger is certainly not better. We frequently get requests from customers to install a big furnace in the mistaken belief that a larger furnace is either more reliable or will offer better comfort. 

The opposite is true. Large furnaces will short cycle, or constantly turn on and off. This leaves you cold, with more expensive energy bills and a furnace that could need replacing much sooner. 

This is why it’s important to work with the right company when buying a new furnace. Even if it’s the correct size but installed wrong, the U.S. Department of Energy says you could forfeit as much as 30% of your energy efficiency. 

Another key component of installation is ductwork. If yours is old or designed wrong, you might have problems with noise or comfort. A furnace is only as effective as the duct system it’s linked to. 

At Service Experts Heating, Air Conditioning & Plumbing, our Expert HVAC technicians are ACE certified, which means they’re skilled in repairing and installing various types of home comfort systems. Besides technical skill, our technicians are also trained in treating you fairly. We also stand behind our work with a 100% satisfaction guarantee for a year.* 

2. Energy Efficiency 

Furnaces are rated by a term known as AFUE, or annual fuel utilization efficiency. Like miles per gallon on cars, this rates the annual gas consumption of a furnace. The higher the number, the less gas is wasted during the heating process. 

If your current furnace is 15 years old, it’s likely ranked well below 80 AFUE. As an example, if your HVAC system is 70 AFUE, you’re throwing away up to 30 cents of each dollar you spend on heating. 

Here’s how AFUE ratings work today: 

  • 80 AFUE—minimum efficiency rating in the U.S. and Canada. 
  • 90 AFUE—ENERGY STAR® rating for furnaces in the U.S. South. 
  • 95 AFUE—ENERGY STAR® rating for furnaces in the U.S. North and Canada. 
  • 98 AFUE—highest efficiency rating available. 

3. Blower Motor Technology 

As you research new furnaces there is one more important thing to consider: blower technology. This part circulates air throughout your home. And it also consumes a lot of electricity, so it’s essential to be familiar with your options. 

There are three types of blowers available on furnaces today. They include: 

  • Standard blower motor. Furnaces that aren’t ENERGY STAR rated have a traditional blower motor that’s been relatively the same for the past 30 years. This motor is the least costly and also the least energy efficient. 
  • Constant torque motor. This technology strikes a balance between cost and energy efficiency. It delivers an electrical efficiency boost over a traditional motor design. 
  • Variable-speed motor. The most energy-efficient furnaces can operate at different speeds. Instead of running at full speed 24/7, they will quietly run at a low or medium speed at times. This helps enhance your comfort while keeping energy costs down, both in the winter and summer. And it also keeps indoor humidity under control. 

4. Sound Reduction Technology 

Sound has become a very important consideration with furnace installation, so another dramatic improvement has been keeping noise under control. Some of these features include: 

  • Sealed and insulated cabinets 
  • Variable-speed blower technology 
  • Nearly silent gas burners 

With this technology, you might not even be aware that your furnace is on. 

5. Smart Thermostat 

You probably have a programmable thermostat, but it’s quite possible you probably aren’t maximizing your energy savings. These thermostats can be difficult to program, particularly if your schedule varies from day to day. 

A smart thermostat removes all the guessing about energy efficiency. Many models can pick up on your temperature preferences and then produce an energy-saving schedule to match. They also recognize when you’re home or away and will adjust your heating and cooling as necessary. 

As a bonus, you’ll also be able to keep tabs on and adjust your settings from just about anyplace on your phone. Some models can even alert you if they find a problem with your furnace or remind you when it’s time to replace your air filter. 

6. Warranty 

There’s a major difference in furnace quality and reliability. Like any big purchase, we think it’s wisest to go with a major brand name. With a leading brand like Lennox® or Goodman®, you’ll have more confidence in the technology and that the manufacturer will uphold its product warranty over the long haul. 

Furnaces usually have two main warranty coverage areas: 

  • Heat exchanger. This is the center of the furnace and the costliest component to replace. This part typically has a 20-year limited warranty or lifetime limited warranty, but this can vary based on the manufacturer and furnace model. 
  • Main components. This includes the blower motor, electronic controls, ignitors and other key parts. Warranties can range from as short as a one-year limited warranty to as much as a 10-year limited warranty. 

When going over warranty coverage, it’s important to know it’s limited. So, you should make sure you get the restrictions. For example, nearly all standard manufacturer warranties only cover the cost of the replacement part, not labor. And labor on a new heat exchanger could get costly. 

Once your new furnace is running, make sure you complete the product registration immediately. Many manufacturers may limit the warranty term if the product registration is not completed. This step is easy and typically only takes a few minutes. 

7. Cost 

How much does all this cost anyhow? It could range from $1,700 for a basic furnace, or $5,500 or more for a high-efficiency model. 

As you consider these costs and the affect on your budget, remember that unlike nearly every other appliance you may need to buy, your new furnace may help pay for itself from the monthly energy savings it offers. 

A couple of additional ways to save include: 

  • Getting a new air conditioner at the same time. 
  • Buying at the ideal time, such as in early fall, mid-winter and early spring. You may be able to get extra discounts and rebates during this less busy season. 
  • Take advantage of rebates from the federal and state government, as well as from your local utility company. We can help you navigate this process. 
  • Finance your new furnace or enroll in our exclusive HVAC Advantage Program™. For just one low monthly fee, you’ll get a new furnace with repairs and maintenance included.* 

How Do I Know When to Replace My Furnace? 

Now that you know what to search for in a new furnace, when should you replace your outdated one? Here are a few ideas from our Experts that will help you make that decision. 

Age 

Heating systems typically last 15–20 years. How long yours will last depends on whether you’ve done furnace maintenance, where you live and your temperature preferences. If you’re in a place with harsh winters, your furnace will run more often, potentially making it wear out sooner. The same applies if you like to keep your home at a hotter temperature. 

Repair Frequency and Cost 

Just like any appliance, as furnaces get older, the potential for frequent furnace repair increases. If your system is more than 15 years old, those repairs can be especially costly. Common and expensive repairs on an older furnace include: 

  • Blower motor failures 
  • Ignition control failures 
  • Heat exchanger failures 

If repairs are greater than the half the price of a new furnace, it’s generally best to replace it. 

Energy Efficiency 

Furnaces older than 15 years can be extremely inefficient. You could be wasting as much as 30% of the money you spend to heat your home. High energy costs and the desire to reduce energy consumption are also strong reasons to consider replacing your furnace. In fact, an independent study by Decision Analyst shows nearly 20% of homeowners who recently replaced their furnace specifically did so to reduce their utility bills. 

Trust Your Furnace Replacement to the Experts 

It can seem intimidating trying to investigate furnace features on your own. Or recognize exactly when you should replace your furnace. Our Service Experts Heating, Air Conditioning & Plumbing Experts are here to make the process much simpler. Contact us at 866-397-3787 or schedule an appointment online to book your free home comfort assessment today. 


*For HVAC Service Memberships, certain warranty exclusions and limitations apply. See your signed agreement for full terms and conditions. For the Advantage Program™, please see your signed Advantage Program Agreement for full details and exclusions. Lease with approved credit; visit ServiceExperts.com for details. 

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