How long does it take to replace a gas furnace?
28 February 2024

How long does it take to replace a gas furnace?

Furnace replacement can be done in a day, and if you select a reputed company like us, it can be done between 4 to 8 hours, depending on the size of your home. At Indoor Comfort Solutions, we understand how important it is to complete the process timely. Therefore, we make use of advanced tools to ensure the replacement process happens smoothly, efficiently, and quickly so you can continue enjoying a warm home environment. In this blog, we will shed more light on how long it takes to replace a gas furnace.

Factors Affecting the Time Required For Gas Furnace Replacement

Here are the signs your gas furnace needs replacement to ensure you are getting it done at the right time. Some common signs include noises, decreased airflow, spills, and high heating expenses. 

Size & Complexity

When it comes to replacing a gas furnace, one of the key factors affecting the time required is the size and complexity of the system. Larger furnaces or those with more advanced features may require additional time for installation and setup. For example, high-efficiency furnaces or those with multi-stage heating capabilities may involve more intricate installation procedures. Similarly, if your home requires a furnace with a higher heating capacity to heat the space adequately, it may take longer to install compared to a standard furnace.

Condition of the Ductwork

The condition of your home's ductwork can also influence the time needed for gas furnace replacement. If your ductwork is old, damaged, or poorly designed, it may need repairs or modifications before installing the new furnace. This can add significant time to the overall process, as the installer may need to address issues such as leaks, blockages, or inadequate airflow. Additionally, the replacement timeline can be extended further if your home requires new ductwork installation or extensive modifications.

The Experience of the Installer

The experience and skill level of the HVAC installer performing the replacement can also impact the time required for the job. An experienced technician who is familiar with gas furnace installations may be able to complete the job more efficiently and accurately compared to someone with less experience. Experienced installers are often better equipped to handle unforeseen challenges or complications that may arise during the installation process, reducing the likelihood of delays. At  Indoor Comfort Solutions, we have a team of highly experienced and well-trained installers who can handle the installation process easily and efficiently, minimizing the replacement time.

Size of Your Home

The size of your home plays a significant role in determining the time needed for gas furnace replacement. Larger homes typically require furnaces with higher heating capacities, which may involve more extensive installation procedures. Additionally, larger homes may have more complex ductwork systems that require additional time to inspect, repair, or modify. Conversely, smaller homes with simpler heating systems may require less time for furnace replacement.


In conclusion, the timeframe for the replacement of the gas furnace depends on several factors, including the size and complexity of the system, the condition of the ductwork, the experience of the installer, and the size of your home. While furnace replacement can typically be completed in a day, selecting a reputable company can expedite the process, with installations typically taking between 4 to 8 hours. At Indoor Comfort Solutions, our experienced technicians use advanced tools and techniques to ensure a smooth and efficient replacement process, minimizing downtime and allowing you to enjoy a warm and comfortable home environment in no time. Trust us for prompt and reliable furnace replacement services tailored to meet your specific needs.

Frequently Asked Questions

Is it hard to replace a furnace?

Replacing a furnace can be a complex task, typically requiring professional expertise due to the intricacies of HVAC systems and safety concerns.

How many years should a gas furnace last?

A well-maintained gas furnace can last anywhere from 15 to 30 years, depending on factors such as usage, maintenance, and quality of installation.

How many hours does a furnace run per day?

The number of hours a furnace runs per day can vary widely depending on factors like outdoor temperature, thermostat settings, and insulation levels. On average, a furnace may run for 8 to 12 hours a day during the heating season.