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7 Things to Consider When Buying a Gas Furnace

Jan 20, 2022

Have you been looking to buy a gas furnace for your new home? Or maybe you’ve finally decided it’s time to replace the old and inefficient gas furnace you’ve been putting up with for the last few years. Whatever the reason, Johnson Comfort will help you choose a new furnace.

Although the search for a new home furnace can be overwhelming, most homeowners aren’t sure what’s best suited to their needs! But don’t worry – we’ve got you covered! This blog post will help you find the best gas furnace fit for your home, budget, and needs.

Searching out your next home energy solution has never been easier! Here are seven things you should consider before buying a new gas furnace:


  1. Size of the Furnace

When looking for a new furnace, the right size is the most important. While most people think that bigger means better and more efficient in heating a home, that’s not always true! If you install an oversized furnace, it will operate twice as much and cycle more frequently.

This will lead to a short circuit in its life and increase the operating costs because of more frequent gas furnace repairs. Meanwhile, a furnace that’s too small can lead to your home not getting adequately heated therefore working twice as much and increasing your electricity bills. So when you need help in figuring out the right size of a gas furnace, it is a good idea to get the help of a licensed contractor.

  1. Type of System

There are three main options of a gas furnace system for heating your home. We’ve listed them below and their corresponding pros and cons:

  1. Single-Stage System


Least expensive

Savings on heating bills



Always running at total capacity


Can have hot and cold areas in the home

  1. Two-Stage System


Automatic adjustment of energy used leading to constant temperature in the home

Can adapt to modulate temperatures (25 to 0 degrees)

Even flow of heat in the entire home



Expensive upfront cost but will save money long-term 

  1. Modulation System


Automatic adjustment of energy used leading to constant temperature in the home

Saves energy by only using what it needs

Constant optimal temperatures and even air


Expensive upfront cost but will save money long-term and provide more comfort


Now that you know the advantages and disadvantages of the different types of gas furnaces, you should better understand what will work best in your home.

  1. Efficiency

When it comes to a gas furnace, choosing a highly efficient one is always better. A highly efficient furnace leads to better performance, less energy wasted, and lower operating costs.

A gas furnace’s efficiency is measured in annual fuel utilization efficiency (AFUE). The higher the AFUE rating, the higher the efficiency. So for a highly efficient gas furnace, choose one that has a high AFUE rating. This could mean a more expensive upfront cost, but lower energy bills throughout its life will pay off.

  1. Installation

The installation of your furnace is essential for its overall performance, lifespan, and efficiency of the system. A proper installation will ensure that you have the best possible results in all these three areas! For your gas furnace installation, always go for quality workmanship and licensed contractors for the best possible results!

So if you’re looking for gas furnace services in Greenwood, always go for Johnson Comfort, a trusted name in the HVAC industry!

  1. Warranty

Another important feature to look at when buying a new gas furnace is its warranty. Understanding your warranty means there will be no surprises down the road! So we recommend that you find one with extended and generous coverage. Basic models tend to have shorter warranties and may only cover repairs for specific parts and labor. While more expensive options offer longer warranties and complete coverage in case anything goes wrong – meaning it will cost less in potential gas furnace repairs down the road!

  1. Price

As with any major purchase, it’s crucial not just to look at the price when considering a new gas furnace. Think about your needs and budget before making final decisions on what kind of unit you want to have. Also, consider the purchase price and the overall gas furnace maintenance and repair expenses you will ultimately save for decades.

  1. Maintenance

You’ve taken your time and done your research on the size, efficiency, installation, warranty, and price for your furnace. But what else should you consider when buying a gas furnace? There is one more important thing you should consider: its maintenance! You already know that a gas furnace will last a long time, but knowing what it takes to keep it working for that long should also be part of your decision.

No matter how efficient your new gas furnace is, it still needs an annual checkup and regular maintenance from a licensed HVAC company to ensure everything is running smoothly every year.

If you need help picking the right gas furnace for your needs, let Johnson Comfort’s experts guide you. Our team is ready to answer any of your questions regarding gas furnace services in Greenwood and provide expert guidance on all things HVAC! We’ll work with you to find the perfect unit that meets your budget and has a high AFUE rating. For furnace installation, we’ll make sure it’s correctly installed, so performance is optimal from day one. Finally, our service technicians are available for annual maintenance visits every year – no matter what kind of warranty or system you choose!

Frequently Asked Questions:

How long will a gas furnace last?

When there is proper maintenance on a gas furnace, it can last at least 15 to 20 years. But a gas furnace’s life can be extended longer when it undergoes annual repair and maintenance.

Are gas furnaces safe?

Yes, gas furnaces are safe. Manufacturers design their furnaces with the main focus and concern on the user’s safety. Whether old or new, all gas furnaces have built-in safety features.

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