7 Things to Know Before Buying a Furnace in Knoxville

Buying a new furnace may not be a priority right away. But it’s smart to know the things that will likely impact your selection when you’re ready to buy. Here are seven things you’ll want to consider when you're due for furnace replacement in Knoxville.

1. Size and Installation Quality

To run at maximum efficiency and comfort, your furnace must be correctly sized for your home. When it comes to furnaces, bigger is definitely not better. We often get requests from customers to purchase a big furnace in the mistaken belief that a larger furnace is either more reliable or will provide better comfort.

The reverse is true. Large furnaces will short cycle, or constantly turn on and off. This leaves you cold, with higher energy bills and a furnace that could wear out much sooner.

This is why it’s important to work with the right company when purchasing a new furnace. Even if it’s the right size but improperly installed, 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 improperly designed, you might have issues with noise or comfort. A furnace is only as good as the duct system it’s attached to.

At R & M Climate Control Service Experts, our Expert HVAC technicians are ACE certified, which means they’re knowledgeable about repairing and installing various types of home comfort systems. Besides technical skill, our technicians are also trained in treating you ethically. We also stand behind our work with a 100% satisfaction guarantee for a year.*

2. Energy Efficiency

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

If your present furnace is 15 years old, it’s likely rated 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 compare new furnaces there is one more important thing to consider: blower technology. This part circulates air throughout your home. And it also uses a lot of electricity, so it’s essential to know about your options.

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

  • Standard blower motor. Furnaces that aren’t ENERGY STAR rated have a standard blower motor that’s been relatively the same for the past 30 years. This motor is the least expensive 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 standard motor design.
  • Variable-speed motor. The most energy-efficient furnaces can run at different speeds. Instead of operating at full blast 24/7, they will quietly run at a low or medium speed at times. This helps improve your comfort while keeping energy costs low, both in the winter and summer. And it also keeps indoor humidity in check.

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 notice that your furnace is running.

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 changes from day to day.

A smart thermostat removes all the guesswork about energy efficiency. Many models can learn from your temperature preferences and then create an energy-saving schedule to match. They also know when you’re home or away and will adjust your heating and cooling as necessary.

As an extra perk, you’ll also be able to monitor and change your settings from just about anywhere on your phone. Some models can even notify you if they detect a problem with your furnace or remind you when it’s time to change your air filter.

6. Warranty

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

Furnaces typically have two primary 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 differ based on the manufacturer and furnace model.
  • Main components. This includes the blower motor, electronic controls, ignitors and other important parts. Warranties can vary from as little as a one-year limited warranty to as long as a 10-year limited warranty.

When reviewing 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 include the price of the replacement part, not labor. And labor on a new heat exchanger could get costly.

Once your new furnace is installed, make sure you finish the product registration immediately. Many manufacturers may reduce the warranty term if the product registration is not completed. This step is simple and usually 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, keep in mind that unlike nearly every other appliance you may need to purchase, your new furnace may help pay for itself from the monthly energy savings it offers.

A couple of other ways to save include:

  • Replacing your air conditioner simultaneously.
  • Buying at the right time, such as in early fall, mid-winter and early spring. You may be able to get additional discounts and rebates during this slower season.
  • Take advantage of rebates from the federal and state government, as well as from your local utility provider. 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 look for in a new furnace, when should you replace your outdated one? Here are a few tips 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 kept up with furnace maintenance, where you live and your temperature preferences. If you’re somewhere with harsh winters, your furnace will run more frequently, potentially making it wear out faster. The same goes if you like to keep your home at a warmer temperature.

Repair Frequency and Cost

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

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

If repairs are more than the half the price of a new furnace, it’s generally recommended 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 keep your home warm. Excessive energy costs and the desire to reduce energy consumption are also strong reasons to think about 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 energy bills.

Trust Your Furnace Replacement to the Experts

It can feel overwhelming trying to research furnace features on your own. Or recognize exactly when you should get a new furnace. Our R & M Climate Control Service Experts Experts are here to make the process much more convenient. Contact us at 865-229-6176 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.