If you’re looking to upgrade your heating system or install one in a new home, you may be wondering just how easy it is to install a furnace. While the thought of diving into home improvement projects can be intimidating, rest assured that with the right knowledge and tools, installing a furnace is a task well within reach for many homeowners. In this article, we’ll explore what makes furnace installation easy and what you should consider before taking on the project yourself.

1. Introduction: Understanding the Basics of Furnace Installation

Installing a furnace can seem like a daunting task for many homeowners. However, with the right knowledge and tools, it can be a relatively straightforward process. In this article, we will guide you through everything you need to know about furnace installation, from the types of furnaces available to step-by-step instructions on how to install one for yourself.

Before delving into the specifics of furnace installation, it’s critical to understand what a furnace is and how it works. A furnace is a heating system that warms the air inside a home through the combustion of fuel. The warm air is then distributed throughout the house via a ductwork system. Most modern furnaces use natural gas as their fuel source, although some can utilize oil, propane, or electricity.

When it comes to furnace installation, there are several factors to consider, such as the type and size of the furnace, the location of the installation, the ductwork system, and safety precautions. It’s crucial to be aware of these factors before deciding whether to install a furnace yourself or seek professional help.

In the next section, we will explore the different types of furnaces available and their specific installation requirements. Understanding these requirements will help you determine the type of furnace that’s best suited for your home and whether you should tackle the installation process on your own or hire a professional.

2. Types of Furnaces and Their Installation Requirements


If you’re considering installing a furnace in your home, it’s essential to understand the types of furnaces available and their installation requirements. Knowing this information will make choosing the right furnace and installation process a lot easier.

Electric Furnaces:

Electric furnaces are an excellent heating option for homes with no access to gas or propane. They are easy to install, and their installation cost is generally lower than that of gas furnaces. They are also more energy-efficient than gas furnaces and require less maintenance.

Gas Furnaces:

Gas furnaces are one of the most popular heating options available to homeowners. They are efficient and can heat the house quickly. Gas furnace installation is more complicated than electric furnace installation, and it requires a gas line to be installed, which adds to the installation cost. Also, a professional technician must install the gas line because it requires specialized knowledge about gas line installation.

Oil Furnaces:

Oil furnaces are another commonly used heating option by homeowners. They are similar to gas furnaces in terms of installation requirements and cost. They also require regular maintenance to ensure they are efficient and running smoothly. Since they run on oil, homeowners must ensure they have enough oil supply, and the tank is installed correctly.


Each type of furnace has its unique installation requirements and costs. Before making a decision on the type of furnace to install, homeowners should consider their home’s heating needs, budget, and the availability of fuel sources. Regardless of the type of furnace, a professional technician’s services are recommended to ensure a safe and efficient installation.

3. Do You Need Professional Help to Install a Furnace?

One of the biggest questions people ask when it comes to furnace installation is whether or not they need professional help. While some may assume that installing a furnace on their own is a simple task, it’s essential to consider the following factors before making a decision.

  1. Level of expertise: If you’re experienced in HVAC installation or have advanced DIY skills, you may be able to install a furnace on your own. However, if you’re unfamiliar with HVAC systems or don’t have much hands-on experience, it’s best to seek professional help.
  2. Tools and equipment: Installing a furnace requires specialized tools and equipment, and it’s essential to use the right ones. Professional HVAC contractors have access to specialized tools and know-how to use them effectively, which is crucial in ensuring that your furnace works safely and efficiently.
  3. Building codes and permits: Installing a furnace may require obtaining building permits and ensuring compliance with building codes and regulations. HVAC professionals have the knowledge and experience to navigate the complexities of building codes, permits, and regulations.

In conclusion, while it is possible to install a furnace by yourself, it’s often safer and more practical to hire an experienced professional. Doing so ensures that the installation is done correctly, safely, and efficiently, giving you peace of mind and saving you time and money in the long run.

4. DIY Furnace Installation: Step-by-Step Guide

Is it possible to install a furnace on your own? Yes, it is. However, it is important to note that furnace installation can be a complex process, and it requires adequate skills and knowledge. In this section, we will discuss a step-by-step guide to help you through the DIY furnace installation process. By following these instructions, you will turn out a successful furnace installation project.

Step 1: Understand the Installation Instructions

Before starting your furnace installation project, make sure you read and understand the installation instructions outlined in the manual that came with your furnace. It’s vital to identify the parts and components required, tools, and safety measures to follow. Ensure you have all the tools and safety gear necessary.

Step 2: Install the Air Supply and Return Ducts

The next step is to install the air supply and return ducts. These ducts are responsible for distributing the air around the room. You will need to measure, cut, and connect the ducts to the furnace using sheet metal screws. Remember to factor in the required clearances between the furnace and the ductwork.

Step 3: Connect the Gas and Electrical Lines

Connecting the gas and electrical lines is a critical step. It’s essential to make sure you use the correct tools and materials and follow safety protocols. Connect the gas line to the furnace using a flexible supply line and ensure the connection is tight. For the electrical line, connect the wires according to color codes.

Step 4: Secure the Furnace in Place

Once the furnace is fully connected, the next step is to secure it in place. Use screws to fasten it to the wall or floor, ensuring it’s levelled. Use a duct sealant to close off any gaps in the ductwork.

By following these steps, you can successfully install a furnace on your own. However, suppose you are not confident about your skills and knowledge in furnace installation. In that case, it’s crucial to consider hiring a professional HVAC contractor to do the job for you.

5. Common Mistakes to Avoid During Furnace Installation

Mistakes during furnace installation can result in inefficient heating, costly repairs, and even safety hazards. It is important to identify and avoid these mistakes to ensure a successful furnace installation.

Not Following Installation Instructions

One common mistake is not following the manufacturer’s installation instructions. Each furnace model has unique installation requirements that must be met to ensure proper functioning. Failure to follow these instructions can lead to poor performance, short lifespan, and even voiding the warranty. It is important to read and understand the installation manual thoroughly before starting installation.

Not Properly Sealing Ductwork

Another frequent mistake is not properly sealing the ductwork. Leaky ducts can reduce the efficiency of the furnace, increase energy bills, and reduce indoor air quality. It is crucial to seal all duct joints and connections with metal tape or mastic sealant. The ductwork should also be appropriately insulated to prevent energy loss.

Incorrect Sizing of Furnace

Installing an incorrectly sized furnace is another critical mistake to avoid. Oversized furnaces can lead to short cycling, energy waste, and cold spots in the home. Undersized furnaces will struggle to keep up with heating demands, resulting in high energy costs and uncomfortable indoor temperatures. Proper furnace sizing requires considering factors such as the size of the home, climate, insulation, and window efficiency.

To avoid making these common mistakes, it is essential to carefully plan and execute the furnace installation or hire a professional HVAC technician. By doing so, homeowners can ensure safe, efficient, and long-lasting heating for their homes.

6. Factors to Consider Before Installing a Furnace on Your Own

Before you start working on installing a furnace on your own, there are a few essential factors that you need to consider. Even though DIY furnace installation seems like a cost-effective option, it is essential to weigh its pros and cons against getting professional help. Here are some crucial factors you need to check off your list before proceeding with a DIY installation.

  1. Technical Skills: Furnace installation is a complex task that requires technical skills, knowledge, and experience. If you do not have any technical background, it is advisable to leave the installation to a professional HVAC technician. Attempting to install a furnace without proper technical skill set may result in system failure, potential hazards, and unnecessary expenses from damage or injury.
  2. Permits and Regulations: Installing a furnace may require local and state permits and certifications. Make sure to check your local building regulations to ensure that you are not violating any law or safety codes related to furnace installation. Always consult with your local authorities and pursue all necessary permits before starting any installation work.
  3. Safety Equipment: Furnace installation involves handling electrical wiring, gas, and other potentially hazardous components. It is critical to wear appropriate safety gear such as gloves, safety glasses, and proper work clothes while installing a furnace. Failing to use safety equipment may lead to possible injuries, accidents, or fatal incidents.
  4. Cost and Time: While DIY furnace installation might seem like a cost-effective option, consider the cost and time it would take to purchase and rent specific tools and equipment required to install a furnace. Weigh the costs of DIY installation and hiring a professional technician to install before making any decision. Remember, time is also an essential factor that should be considered during the installation process.

In conclusion, furnace installation is a significant investment that requires careful consideration of technical skills, permits, safety, and cost. Consulting with a professional HVAC technician is always a wise option before deciding to install a furnace on your own. Remember, safety always comes first.

7. Conclusion: Making the Right Decision about Furnace Installation

Installing a furnace is a crucial decision that requires careful consideration before taking any action. After going through this article, one can tell that installing a furnace without professional help is possible but not recommended in all scenarios.

Factors that affect the decision of installing a furnace:

  • Cost: Hiring a professional installer increases the installation cost, but they have the necessary skills and tools to get the job done. On the other hand, DIY installation can save one several hundred dollars, but there might be some hidden costs if one does not get the installation right.
  • Expertise: Installing a furnace is complicated, and it requires technical knowledge and experience.
  • Risk: Furnace installation involves dealing with gas and electrical components. A mistake during installation can lead to severe injuries, death, or property damage.

Before making the final decision, consider evaluating the installation requirements, available resources, and risks involved. If one is confident in their installation abilities, have the right tools, and can adhere to the safety protocols, they can consider installing a furnace on their own. However, if it’s a first time, one should consider hiring a licensed professional to avoid costly and potentially fatal mistakes.

People Also Ask

What skills are needed to install a furnace?

Installing a furnace requires expertise in handling gas and electrical connections, ductwork, and venting. A professional furnace installer possesses the necessary knowledge, skills, and tools to ensure the safe and efficient installation of a furnace.

Can you install a furnace yourself?

Installing a furnace can be a challenging task, and it is not recommended for DIY enthusiasts. It is best to hire a licensed and experienced HVAC technician to install the furnace correctly, ensure it is up to code, and reduce the risk of damage or injury.

How long does it take to install a furnace?

The time it takes to install a furnace depends on several factors such as the type of fuel, size of the unit, complexity of the installation, and the condition of the existing ductwork. On average, a furnace installation can take from 4 to 10 hours for a professional technician.

What is the cost to install a furnace?

The cost to install a furnace varies depending on several factors, including the type of furnace, size of the unit, region, and labor fees. On average, the cost can range from $2,500 to $7,500 to install a furnace.

What are the benefits of hiring a professional to install a furnace?

Hiring a professional to install a furnace ensures the job is done efficiently and correctly, reducing the risk of damage or injury. Professionals have the necessary tools, training, and experience to handle any issues that arise during installation and ensure the furnace is up to code.


Installing a furnace is a complex and potentially dangerous process that requires expertise in multiple areas. While it may be tempting to save money by installing a furnace yourself, it is highly recommended to hire a licensed and experienced HVAC technician to ensure the safe and efficient installation of the furnace. By doing so, you can avoid potential issues, ensure the furnace is up to code, and enjoy the peace of mind that comes with professional installation.