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Furnace Install Guide: What To Know About Furnace Installation

By Travis Baugh

Our furnace installation guide will walk you through the benefits of professional furnace installation, steps in the furnace install process, provide tips on how to find a local furnace installer, and help you answer frequently asked questions on furnace installation.


How to Install a Furnace

The furnace installation process involves several critical steps to ensure proper setup and safe operation. Here’s a comprehensive overview of the process.

1. Pre-Installation Assessment And Preparation

Your HVAC contractor will start the process by evaluating whether you need your furnace replaced, then assessing your home’s heating needs based on size, insulation, and layout. The furnace installer will then recommend the appropriate furnace type (gas furnace, electric furnace, oil furnace), size, and efficiency (measured in AFUE rating) based on the home evaluation. Upon arriving at you home, the furnace installer will then clear the installation area (usually in a basement, attic, or utility closet) and ensure proper ventilation and access.

2. Remove The Old Furnace 

Your furnace installer will turn off power and gas supply to the old furnace and disconnect the old furnace from ductwork, fuel lines, electrical connections, and exhaust venting. After that, it’s time to safely remove and dispose of the old furnace.

3. Prepare the Furnace Location

Once the old furnace has been removed, it is time to prepare the furnace location. Your furnace installer will ensure that the existing ductwork is compatible with the new furnace. If needed, the technician may modify or install new ducts for proper airflow. For a gas furnace, a gas line connection will be installed if one is not already in place. If you plan on installing a propane furnace, a propane tank or line will need to be hooked up. For electric furnaces, the technician will install the necessary electrical wiring or connections to ensure proper operation.

4. Install The New Furnace

Next, the new furnace will be positioned in the designated area, ensuring it’s level and properly aligned as an upflow furnace, downflow furnace, or horizontal furnace. The new furnace will be attached to the existing or new ductwork with all connections secure and sealed. For a gas furnace, the furnace will be connected to the gas supply line, using proper fittings and ensuring there are no leaks. For electric furnaces, wiring is connected to the furnace, and a dedicated circuit breaker is installed if needed. The exhaust venting system is then installed, ensuring the furnace safely vents combustion gases outside. Ducts are connected to the furnace’s supply and return ports. Venting is also installed to ensure proper air circulation and exhaust of combustion gases.

carrier furnace installer finishes installing furnace near me

5. Furnace Configuration and Testing 

Once the new furnace has been installed, it's time to configure the furnace and test it. If a new thermostat is being installed, the technician will wire it and set it up to communicate with the furnace. The furnace settings, including airflow and temperature settings, are adjusted for optimal performance.  Next, the technician will run the furnace to check its operation. This includes verifying airflow, heating capacity, burner function, and safety features like pressure switches and ignition.

6. Final Checks and Safety Verification  

If a gas furnace was installed, the HVAC contractor will check for gas leaks using a detector or soapy water around the connections. For an electric furnace, the HVAC contractor will ensure the electrical connections are grounded properly and that all circuits are functioning correctly. After that, it's time to ensure the proper venting of combustion gases. The flue must be free of blockages, and the venting system should direct gases safely outside.  The HVAC contractor will verify the system’s airflow, making sure that it distributes heat evenly throughout the home.

7. Cleanup and Inspection

Finally, the area around the furnace is cleaned up, and any debris from the installation process is removed. A final inspection will be performed to ensure everything is in place and functioning correctly. The HVAC contractor will explain how to operate the furnace, including how to adjust the thermostat, change furnace filters, and maintain the system. Some companies may offer a follow-up inspection after a few weeks to ensure that the furnace is operating optimally.

a carrier furnace installer explains the furnace install process to a man kneeling by furnace

a carrier furnace installer talks to a homeowner after performing furnace installation

Benefits of Choosing Professional Installation vs DIY

Installing a new furnace is a complex project that goes far beyond simply connecting equipment. While DIY HVAC installation may seem like a way to save money upfront, the risks and long-term consequences often outweigh the benefits.

Improper Sizing Risks Efficiency and Comfort

One of the most common DIY mistakes is installing the wrong size furnace. Without a professional load calculation, homeowners may choose a unit that’s too large or too small for their space. This can lead to frequent cycling, uneven heating, excessive energy use, and premature system wear.

Safety Hazards Can Be Serious

Furnace installation involves handling gas lines, electrical components, and venting systems—each with potential safety hazards if done incorrectly. DIY errors can result in gas leaks, carbon monoxide exposure, fire risks, or voided warranties. Professional installers are trained to follow strict safety standards and ensure your system is code-compliant and secure.

Energy Efficiency Depends on Precise Installation

Even a high-efficiency furnace won't perform well if it's not installed properly. Poor duct connections, incorrect airflow, or misaligned components can reduce efficiency and increase energy bills. Professional HVAC installers optimize every part of the setup to help your furnace operate at peak performance.

Protect Your Investment and Peace of Mind

Choosing a professional furnace installer gives you the confidence that your system will work reliably and efficiently. It also ensures you maintain manufacturer warranties and reduce the likelihood of costly repairs down the road.
 
Work with your local Carrier dealer to find the ideal Carrier high-efficiency gas furnace for your home—and have it installed the right way from the start.

Why Choose Carrier For Furnace Installation 

Carrier is synonymous with quality and reliability when it comes to furnace installation. For decades, we have provided homeowners with superior heating solutions.

One key reason to choose Carrier is our Factory Authorized Dealers. These experts possess the knowledge and expertise to manage any installation with precision and care. They have NATE certification to ensure they are up to date with the latest industry advancements and are adhering to best practices to ensure your furnace is installed correctly and efficiently.

Additionally, we offer a wide range of energy-efficient furnace options to meet your specific needs. Our furnaces are designed to maximize heating performance while minimizing energy consumption, helping you save on heating utility bills without compromising comfort.

Choosing Carrier for your furnace installation means you’re investing in a reliable and efficient heating solution. 

Warranty and Maintenance for Your Carrier Furnace

Carrier's Warranty Coverage

Carrier offers comprehensive warranty coverage on its furnaces to ensure peace of mind for homeowners. Most new Carrier furnaces come with a 10-year limited parts warranty, which covers the cost of furnace replacement parts if they fail due to manufacturing defects.  Carrier also offers a heat exchanger warranty to cover the furnace's core component. In some cases, your local Carrier dealer may offer extended warranties or labor warranties. 
a graphic shows carrier furnace installation options

Furnace Maintenance

Regular furnace maintenance is essential to ensure your Carrier system operates at peak efficiency and lasts for many years. Scheduled maintenance helps identify potential issues early, preventing expensive furnace repairs and improving energy efficiency. It includes tasks like cleaning filters, checking the heat exchanger, lubricating moving parts, and inspecting the blower motor. This not only enhances comfort but also reduces energy consumption, saving you money on utility bills.
 
Many authorized Carrier dealers offer maintenance plans that provide scheduled inspections and services. These plans often include priority service, discounts on repairs, and additional benefits like extending your warranty coverage. 

How to Find a Carrier Technician For a Furnace Installation Near Me

To find a Carrier furnace installer near you, visit our Dealer Locator. Contact the dealer of your choice to schedule a consultation or furnace replacement. They can assess your home's heating needs and recommend suitable furnace models. Request a detailed quote that includes the cost of the furnace, installation services, and any additional fees. Comparing quotes from multiple dealers can help you find the best value. Contact your local Carrier dealer today and find furnace installation near me.

a man researches furnace installation near me on his tablet

Frequently Asked Questions About Furnace Installation

No, installing a furnace yourself is not recommended. It requires specialized knowledge of gas lines, electrical systems, and ventilation. Improper installation can be dangerous and may void warranties. It's best to hire a licensed HVAC professional for proper installation.
The duration of furnace installation varies based on factors like the type of furnace, installation complexity, and any additional modifications required. On average, a typical furnace installation takes about 10 to 15 hours. However, complex installations or those involving ductwork modifications may take longer.
Typical labor costs can range from $50 - $100 per hour for a licensed technician. Each additional team member will be an additional charge. The total labor cost to install a furnace will depend on factors like the furnace type, complexity of installation, and location. Total installation costs, including the unit, can range from $3,800 to $12,000 or more. Learn more about new furnace cost.
The cost of furnace installation depends on factors like the type and size of the furnace, your home's location, labor cost, and any additional components or services needed. With that said, there’s a fairly wide range of furnace cost ranging from $3,800 to $12,000 for a gas furnace and $2,500 to $10,000 for an oil furnace. Be sure to check out our cost of a gas furnace and cost to replace an oil furnace pages for more details.
Furnace installation is costly due to the price of the unit, professional labor, and necessary components like ductwork and venting. Additionally, proper installation ensures safety, efficiency, and compliance with local codes, which requires skilled technicians.

Explore Carrier Furnaces

Choosing a Carrier furnace ensures reliable and efficient heating for your home, with advanced technology that optimizes energy use and enhances comfort. Known for their durability and quiet operation, Carrier furnaces provide consistent warmth throughout the winter while helping to reduce heating costs. Explore Carrier's line of furnaces today.

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