How To Replace Old Floor Furnace – Step By Step Guide

As the winter season approaches, ensuring that your home heating system is functioning optimally is essential. If you have an old floor furnace, it may be time to consider replacing it.

Floor furnaces are a popular heating option for many homeowners due to their effectiveness and efficiency in heating a room. However, these furnaces may become outdated, inefficient, and require replacement over time. If you’re considering replacing your old floor furnace, you’ll need to follow a few simple steps to ensure the process is successful.

Here, we’ll provide you with a step-by-step guide on how to replace an old floor furnace. We’ll begin by discussing the common signs that indicate it’s time to replace your furnace, such as age and inefficiency. We’ll also explore the different types of floor furnaces available and which one may be the best fit for your home.

Old Floor Furnace

7 Easy Steps To Replace Old Floor Furnace

7 Easy Steps To Replace Old Floor Furnace

Start by turning off the gas supply and disconnecting the old floor furnace. Next, remove it from its mounting brackets and clear away any debris. Then, align and securely mount the new floor furnace during installation. Connect the gas supply to the new furnace, following safety guidelines.

Test the new floor furnace to ensure it functions properly before sealing it. Finally, seal any gaps or openings around the furnace to prevent heat loss. Here are the full process and details of 7 Easy Steps for Replace an Old Floor Furnace:

Step 1: Turn Off The Gas Supply And Power Source

it is important to turn off the gas supply and power source. This will prevent potential leaks or accidents while working on or removing the furnace. To turn off the gas supply, locate the shut-off valve near the furnace and turn it clockwise until fully closed.

Next, locate the circuit breaker or switch that controls the power to the furnace and flip it to the “off” position. By taking these precautionary steps, you can ensure your safety and avoid any potential hazards associated with working on an old floor furnace.

Step 2: Remove The Old Floor Furnace

Remove The Old Floor Furnace

To begin the process, turn off the gas supply to the floor furnace, ensuring safety throughout the removal. Carefully disconnect any gas lines and electrical connections attached to the old furnace, taking extra caution with the gas valve. Once disconnected, remove any screws or bolts securing the floor furnace in place.

To aid in the removal, consider using a dolly or seek assistance to safely lift and remove the old floor furnace from its location. After removal, clean the area where the old furnace was located, removing debris and dust. Finally, carefully follow the manufacturer’s instructions to prepare the new floor furnace for installation.

Step 3: Measure The Opening And Select A New Floor Furnace

When replacing an old floor furnace, one of the most important steps is to measure the opening and select a new floor furnace that will fit properly. To do this, you must measure the dimensions of the existing opening on your floor where the old furnace is located.

This includes measuring the length and width of the opening. Once you have these measurements, you can shop for a new floor furnace that matches the dimensions of your existing opening.

Selecting a furnace that fits snugly into the opening is important to ensure proper installation and efficient heating. Consider factors such as energy efficiency and heating capacity when choosing a new floor furnace for optimal performance.

Step 4: Install The New Floor Furnace And Connect The Gas Line

Install The New Floor Furnace And Connect The Gas Line

it is important to take the necessary steps to install the new floor furnace and connect the gas properly. First, you must remove the old furnace by disconnecting it from the gas line and removing any screws or bolts holding it in place. Follow the manufacturer’s instructions to install the new floor furnace after you remove the old furnace.

This may involve connecting the gas line, securing the furnace, and making necessary adjustments to ensure proper functioning. It is crucial to follow all safety guidelines and consult a professional to ensure a successful installation and safe operation of your new floor furnace.

Step 5: Connect The Electrical Wiring

Connect The Electrical Wiring

When dealing with an old floor furnace, connecting the electrical wiring properly is important. This ensures that the furnace functions safely and efficiently. To connect the electrical wiring, start by turning off the power supply to the furnace at the main circuit breaker. Then, carefully remove the furnace cover to access the wiring compartment.

Follow the manufacturer’s instructions or consult a professional electrician if you are unsure how to connect the wires properly. It is crucial to double-check all connections and ensure that they are secure before restoring power to the furnace. By taking these steps, you can ensure that your old floor furnace operates smoothly and effectively.

Step 7: Make Necessary Adjustments And Enjoy The Warmth

To make necessary adjustments and enjoy the warmth,  it may require some adjustments to ensure that it is working efficiently and safely. Over time, these furnaces can become less effective at heating your home and may pose a risk of carbon monoxide leaks if not properly maintained.

It is important to have a professional inspect and service your old floor furnace regularly to ensure it functions properly. They can make any necessary adjustments or repairs to improve its efficiency and safety. Once your old floor furnace is in good working order, you can enjoy its warmth and comfort throughout your home.

Troubleshooting And Maintenance Tips

If you have an old floor furnace in your home, it’s important to maintain regular maintenance to ensure it continues functioning properly. Here are some troubleshooting and maintenance tips for your old floor furnace:

Check the pilot light: If your furnace is not producing heat, you should first check the pilot light. Make sure to light it and keep it burning a steady blue flame. If the pilot light is not lit or flickering, try relighting it according to the manufacturer’s instructions.

Clean or replace the filter: A dirty or clogged filter can restrict airflow and reduce the efficiency of your furnace. Check the filter regularly and clean or replace it as needed.

. Inspect the burners: Over time, debris and dust can accumulate on the burners, affecting their performance. Inspect the burners and clean them using a soft brush or vacuum cleaner.

Check for gas leaks: If you smell gas near your floor furnace, immediately turn off the gas supply and contact a technician. Qualified professionals should address gas leaks as they can be dangerous.

Schedule regular maintenance: It’s a good idea to have your old floor furnace inspected and serviced by a professional technician at least once a year. They can identify potential issues and make necessary repairs to keep your furnace running smoothly.

By following these troubleshooting and maintenance tips, you can help extend the lifespan of your old floor furnace and keep it operating efficiently throughout its years of service.


The old floor furnace had been a reliable heat source for years, but now it had seen better days. Its once-glowing coals had faded, and the metal grates were rusted and pitted from years of use. Replacing an old floor furnace can be straightforward if you follow the right steps.

By turning off the gas supply and power source, removing the old furnace, measuring the opening and selecting a new one, installing and connecting the gas line and electrical wiring, making necessary adjustments, and performing regular troubleshooting and maintenance, you can enjoy the warmth of a new floor furnace in no time. If you’re unsure about any step or need further guidance, consult a professional to ensure a safe and successful replacement process.

Frequently Asked Questions

1.Do People Still Use Floor Furnaces?

Ans: People still use floor furnaces in older homes and commercial buildings. However, their popularity has declined due to safety concerns and more efficient heating options. They can often be found in regions where they were commonly installed in the past. However, upgrading to a modern, energy-efficient heating system might be worth considering if you have an old floor furnace.

2.What Is The Difference Between A Furnace And A Floor Furnace?

Ans: A furnace is a heating system that distributes warm air throughout a building. A floor furnace provides direct heat to a specific area because it is designed to be installed on the floor.

Unlike traditional furnaces, floor furnaces are often used in older homes and buildings where central heating systems may not be available or practical.

3.What Type Of Heating Is A Floor Furnace?

Ans: A floor furnace is a heating system that is installed directly into the floor. It uses natural gas or propane as fuel to provide localized heat to specific areas of a room. Common in older homes, floor furnaces offer an efficient and cost-effective heating option.

4.Why Should A Floor Furnace Be Replaced?

Ans: There are several reasons why a floor furnace should be replaced. Over time, they can become inefficient, resulting in higher energy costs. Additionally, old floor furnaces may pose safety risks such as gas leaks or fire hazards.

Replacing a floor furnace can improve indoor air quality and eliminate health concerns. Upgrading to a newer model can also provide better heating performance and more control over temperature settings.

5.What Can I Do To Improve My Old-School Gas-Fired Floor Furnaces?

Ans: Consider upgrading to a more modern and efficient heating system. Ensure regular maintenance and cleaning of the floor furnace. Install a programmable thermostat for better temperature control. Improve home insulation to minimize heat loss and enhance overall efficiency.

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