Your furnace works hard daily to keep you and your family warm and comfortable. However, furnaces eventually break down due to normal wear and tear or other issues. If you need to replace your unit, you might wonder: How long does it take to install a new furnace?
The installation timeline depends on several factors, but most contractors can replace a furnace in four to ten hours. More complex projects might take a day or two to complete. Read on to learn more about new furnace installation.
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Factors that Affect Furnace Installation Times
Furnaces vary significantly depending on their brand, manufacturer, and model. Below are some of the most important factors that affect furnace installation times.
HVAC Model
The specific model HVAC you buy may have specific installation conditions that differ from other models. For example, electric furnaces are usually cheaper to install than gas furnaces because most homeowners already have the correct electrical hookups in their HVAC closet.
Furnace Size
The size of the furnace also affects installation times. For example, a furnace for a one-bedroom apartment or two-bedroom home will usually take less time to install than a larger furnace for a four-bedroom house.
Furnace Location & Accessibility
Depending on where your furnace is located in your home, it may take more or less time to replace it. Additionally, the presence of utility lines, such as electrical or gas line modifications, affects installation times. For instance, it will take longer to install a gas furnace if the contractors need to run a new gas line to the unit.
Ductwork Requirements
Depending on the type of furnace you get, you may have to reorient your ductwork. Depending on how much ductwork needs to be added, installing new ductwork can take a few days. Conversely, some heating systems, such as mini splits, don’t require ductwork installation or connection, so they take less time to install.
Additional Furnace Systems
The inclusion of additional furnace systems can further increase installation times. For example, installing zoning features on your furnace system will take longer as the technicians will have to install the proper zoning shutters in your ductwork in addition to the new furnace.
Furnace Installation Process
The first step of the installation process involves having a technician walk you through your home to prepare the site. While there, the technician will make note of any repairs or upgrades they will need to make, and they should be able to tell you approximate installation times.
Next, they will schedule an installation time. You won’t have access to your HVAC system while they are replacing it, so we recommend scheduling a time when you will be out of the house so the installers can work without interruption.
After completing the installation, the technicians will walk you through the post-installation inspection to ensure all connections are secure and the system is working as expected. At this point, you can ask your technician any pressing questions about maintaining your system.
Signs You Need a New Furnace
If you notice any of the following signs, your furnace is probably not in good shape, and you may want to call an expert to discuss furnace replacement:
- Your furnace is over 15 years old.
- The heating in your home is uneven.
- Airflow is restricted.
- Your energy bills have started to rise rapidly.
- Indoor air quality has decreased.
- You have to make frequent repairs.
- Bad smells come from your ducts.
Old furnaces are not only a drain on your power bill; they can also be dangerous. For example, damaged electrical or gas lines can pose a health and safety hazard for you and your family. As such, don’t hesitate to contact an expert and discuss furnace replacement. The sooner you call for replacement, the sooner you can enjoy your new, energy-efficient system.
Furnace Installation Services
So, how long does it take to install a new furnace? It depends on the specific furnace, but you can expect your furnaces to be properly installed anywhere between four and ten hours.
Read our blog if you want to learn when to repair and when to replace your heating system. Contact Dial One Johnson Plumbing, Cooling & Heating online or call 972-291-0740 today to schedule an appointment!


