Furnace Installation & Furnace Replacement FAQs

Posted on: November 22, 2016 | by: HVAC.com July 26, 2017



Find the answers to all your burning furnace questions here.

Furnace Installation FAQs

How much does furnace installation cost?


Nationally, the average cost of furnace installation is $4,000. Many factors affect cost, including duct installation or repairs.

How is equipment size determined for my furnace installation?


Your HVAC contractor should perform Manual J to determine the heat load of your home to size your new furnace. This calculation considers many factors related to the home’s construction, occupants, and exterior elements for accuracy.

How can I tell how efficient a furnace is?


If you desire high efficiency models for furnace installation, look for furnaces with an AFUE in the 90s. AFUE stands for annual fuel utilization ratio. It tells you how much heat the furnace creates for every dollar of heating fuel the unit consumes. All new furnaces must have an AFUE of 80. The highest efficiency models have a rating of around 98 AFUE.

Can I perform my own furnace installation?


Furnace installation requires advanced technical knowledge and skills to ensure a safe and accurate installation. If you don’t have this knowledge, best leave installing your furnace to licensed professionals.

Furnace Replacement FAQs

How long will my furnace last before I need to replace it?


The average furnace offers a service life of 15 years. With yearly maintenance, your furnace may last longer. Without it, it may fail sooner than 15 years.

Should I repair my furnace or do a furnace replacement?


If your furnace is close to the end of its estimated service life and frequent breakdowns occur, you may choose furnace replacement instead of repair. When facing repairs totaling over 50 percent of the cost to buy a new furnace, replacing the furnace may be a better investment.

Is it best to replace my furnace with the same type or one that uses a different fuel source?


This is up to your preference, but switching from electric to natural gas heat can lower your operating costs. Natural gas furnaces are more efficient to run, and natural gas typically costs less than electricity. Many factors can affect the savings switching can generate for you, such as if you already have natural gas lines installed or if you will need to have them ran to your home.

What’s the best time of year to schedule furnace replacement?


Furnace replacements and furnace installations take place year-round. Ideally, you will want to schedule this in the spring or fall. These are periods where heating and cooling contractors are generally not as busy. You’ll have more flexibility in scheduling the job and may be able to take advantage of pre and post season deals.

Should I replace my air conditioner at the same time as furnace replacement?


Replacing furnaces along with air conditioners is ideal to create balanced HVAC systems. Both systems share air handlers and indoor coils, so upgrading all equipment together can ensure all components are properly matched, and save labor. If both systems are 10+ years old and have had a lengthy repair history, you should replace them all at the same time. If one is newer, it may not be financially smart to replace it just for the sake of matching the systems.


If you have unanswered questions about furnace replacement and furnace installation, feel free to contact the HVAC.com team of furnace experts. If you are ready to purchase and install a new furnace, we’ll help you find a local furnace installation pro who can handle the job.

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