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The Home Depot

How Much Does a Gas Wall Furnace Installation Cost?

Pro Referral > Home Guides > Heating & Cooling > How Much Does a Gas Wall Furnace Installation Cost?
How Much Does a Gas Wall Furnace Installation Cost?

A gas wall furnace provides convenient and efficient heating for a number of settings. Your furnace installation may require fuel, electric, and ventilation connections and should be completed by a qualified professional. The style and size of your appliance will contribute to the cost of installation, as will the condition and location of the installation site. Your contractor or retailer can help you select a model that is sufficient for your needs and will evaluate how the circumstances of your project may affect its expense.

Average Prices

Installation Locations

Many aspects of your gas wall furnace installation are affected by the size and capacity of the unit and the ease with which your contractor can run gas, electric, and ventilation lines as needed. Though furnaces used in apartments may be smaller than those intended for larger homes, maneuvering and installing them in large buildings can present challenges. The cost of an apartment installation averages $784, compared to $802 for one in a single-family home where access to exterior walls, wiring, and fuel supply is often simpler. Similar variables contribute to the cost of a commercial installation, which may cost about $1136.


New and Replacement Installations

Installing a gas wall furnace in a new location may require significant prep work, and typically costs about $938. The project may call for changes to your home’s wiring to provide a connection for the unit’s controls, and will require a dedicated gas supply line. If the furnace you select needs direct ventilation to the outside of your home, your contractor will need to create and properly weatherproof a hole through an exterior wall. Replacement installations are often much simpler, since existing electrical, gas and ventilation lines can be utilized. Replacement projects cost an average of $704, though any needed upgrades or repairs to the installation site will increase the cost of your project.


Heating Requirements

Gas wall furnaces are effective at heating single or multiple rooms, though the scale of your project will influence both the equipment and installation requirements of the job. Your contractor can evaluate the layout, size, and heating needs of your home to recommend an effective furnace. He can help you plan for proper placement and various installation requirements, such as fitting additional vents to heat adjacent rooms. Installing a furnace to service a single room generally costs about $487, while it may cost $749 to fit a unit that heats two rooms and $902 for a three-room application.


Area to Heat

Though several factors influence the selection and installation of furnaces that heat multiple rooms, the overall square footage of any space is essential for choosing an adequate unit. As heating requirements increase, the overall size and weight of furnaces may increase accordingly, affecting the equipment and manpower needed to maneuver the appliance for installation. Fitting a gas wall furnace to heat a small area of less than 100 square feet costs an average of $307, compared to $484 for installing one to heat 100 to 500 sq. ft., $613 for a furnace in a 500 to 1000 sq. ft. space, and $822 for one in a 1000 to 1500 sq. ft. area. Gas furnaces designed to heat large spaces over 1500 square feet may cost $1308 to install.


Supplying Equipment

Gas wall furnaces can generally be purchased from a dealer or other retailer, or supplied by your installer. If you prefer to purchase your furnace independently, installation alone could cost about $208. Your contractor may charge a markup to supply the furnace unit and any other materials needed for installation, but including materials in the job can simplify your planning and preparation. Total project costs average $814 when contractors both provide and install a new gas wall furnace.


Planning for Your Installation

As you budget for installing a gas wall furnace, consider how its capacity, size, and ventilation requirements may affect the demands of the job. Your retailer or contractor can help you select a furnace that is suited for your application and help determine how the accessibility of gas lines, electricity, and ventilation will influence the cost of installation.

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