How Much Does a New Furnace Cost in South Carolina?

November 20, 2023
A furnace in a basement

As winter approaches in South Carolina, the importance of a reliable and efficient heating system becomes increasingly evident. A furnace is not just a purchase; it’s an investment in your home and your comfort. However, the cost of installing or replacing a furnace can often be a significant financial decision, one that requires careful consideration and planning. That’s why understanding the various factors that contribute to the cost of a new furnace is crucial. 

This article serves as a comprehensive guide to help you navigate the complexities of furnace costs, specifically tailored to the unique needs and considerations of residents in South Carolina. Whether installing a new system or replacing an old one, our guide will provide the information you need to make an informed decision.

Why South Carolina is Unique for Furnace Costs

South Carolina is known for its mild winters compared to other parts of the country, but residents still need a reliable heating system. The climate here does experience cold snaps and chilly nights, making a furnace essential for maintaining a comfortable indoor environment. However, the milder climate also means that you might not need the highest BTU output or the most energy-efficient model, which could result in cost savings.

Local regulations in places like Charleston may also impact your furnace installation costs. For instance, building codes require specific types of venting or insulation that could add to the overall expense. Additionally, South Carolina offers various energy-efficient home improvement incentives, including rebates for high-efficiency furnaces, which could significantly offset your initial investment.

Furthermore, the trend towards sustainable living in South Carolina has increased the availability of eco-friendly furnace options. While these models might have a higher upfront cost, they are built to last and often result in lower utility bills and could be eligible for additional rebates or tax credits.

Understanding these local nuances is crucial for making an informed decision about your furnace purchase, ensuring that you choose a system that is both cost-effective and suitable for South Carolina’s specific needs.

Types of Furnaces and Their Costs

There are several types of furnaces to choose from. Each comes with its own set of advantages and disadvantages, as well as varying costs for both installation and long-term operation. Here’s a breakdown:

Electric Furnaces

Electric furnaces are generally the least expensive, ranging from around $1,600 to $6,200, including installation. They are also easier to maintain and have a longer lifespan, often up to 30 years. However, they are less energy-efficient and can result in higher monthly utility bills, especially if electricity rates in your area are high.

Gas Furnaces

Natural gas furnaces are among the most common and are known for their efficiency. Installation costs can vary between $3,800 and $10,000, depending on the model’s efficiency rating and size. Over the long term, gas furnaces are more economical due to lower fuel costs, especially if your home is connected to a natural gas line.

Oil Furnaces

Oil furnaces are less common today but are still an option, particularly if your home needs to be connected to a natural gas line. The installation cost for an oil furnace can range from $6,750 to $10,000 or higher. While oil furnaces can be efficient, the cost of oil is generally higher than natural gas, making them more expensive to operate in the long run.

Propane Furnaces

If natural gas isn’t an option and you’re looking for something more efficient than an electric furnace, propane could be the answer. Installation costs range from $3,400 to $7,135. Propane furnaces offer high efficiency but require a storage tank, which can be an eyesore and needs regular refilling.


In terms of initial costs, electric furnaces are generally the cheapest, followed by propane, gas, and then oil furnaces. However, when considering long-term expenses, gas furnaces often come out on top due to lower fuel costs and higher efficiency, followed by propane and oil. Electric furnaces, while cheap to install, can become costly in the long run due to higher electricity bills.

Factors Affecting the Cost

When budgeting for a new furnace, it’s essential to consider various factors that can significantly impact the overall cost. Here’s a closer look at some of these critical elements:

Size (BTUs)

The size of the furnace, measured in British Thermal Units (BTUs), is a critical factor in determining its cost. A furnace that is too small won’t adequately heat your home, while an oversized unit will cycle on and off frequently, reducing efficiency and lifespan. The size you’ll need is generally calculated based on your home’s square footage and the local climate. For a typical home in South Carolina, a mid-range BTU furnace would likely suffice, given the milder winters.

Efficiency (AFUE ratings)

The Annual Fuel Utilization Efficiency (AFUE) rating indicates a furnace’s efficiency. Higher AFUE ratings mean better efficiency but often have a higher initial cost. However, a more efficient furnace can save you money in the long run through lower energy bills.


Different brands offer various features, warranties, and efficiencies, which can affect the cost. Trusted brands may offer longer-lasting and more efficient models at a premium price. It’s essential to balance brand reputation with your budget constraints.

Installation vs. Replacement

Replacing an existing furnace is generally less expensive than installing a new one in a home without a furnace. This is because the ductwork, venting, and other infrastructure are already in place, reducing labor and material costs.

Local Labor Costs

Labor costs can vary significantly depending on your location. In Charleston, SC, the cost of living is relatively moderate, which could mean more affordable labor rates than other cities. However, it’s always a good idea to get multiple quotes to gauge the local market accurately.

Additional Costs to Consider

When budgeting for a new furnace in Charleston, SC, it’s crucial not to overlook the additional costs that can quickly add up. Here are some to keep in mind:

Old Furnace Removal

If you’re replacing an old furnace, you’ll need to factor in the cost of its removal and disposal. This can range from $50 to $200, depending on the complexity of the job and local disposal fees.


Most local governments require permits for new furnace installations or replacements. The cost of these permits can vary but generally range from $50 to $300. Always check with your local building department for the most accurate information.


If your home doesn’t have existing ductwork or the current system needs significant repairs or replacement, this can be a substantial additional expense. Ductwork installation can cost anywhere from $1,000 to $5,000 or more, depending on the size and complexity of the system.

Insulation and Windows

Proper insulation and energy-efficient windows can significantly impact your furnace’s efficiency. While not a direct cost of the furnace, improving these areas can add to your overall expenses and result in long-term energy savings.

How to Save on Your New Furnace

Investing in a new furnace is a significant financial commitment, but there are ways to ease the burden:

Rebates and Incentives

South Carolina offers various rebates and incentives for installing energy-efficient furnaces. Check with your local utility company or visit state energy websites to see what’s available.

Tax Credits

Federal tax credits for energy-efficient home improvements can also help offset the cost of a new furnace. Consult a tax professional to understand what you may be eligible for.

Maintenance Costs

Regular maintenance is essential for ensuring the longevity and efficiency of your furnace. Neglecting this can result in higher energy bills and a shorter lifespan for your system. Maintenance usually includes tasks like filter replacement, cleaning, and inspections to catch any issues before they become significant problems.

New Furnace Installation in South Carolina: Final Thoughts

Investing in a new furnace is a significant decision that involves various factors, from the type of furnace and its efficiency to additional costs and local considerations specific to South Carolina. Armed with this comprehensive guide, you’re better equipped to make an informed choice. If you need a new furnace, make sure you schedule an appointment with us as soon as possible.

Carney & Son Air Conditioning and Heating

Carney & Son, 72 Degrees

We are a family Owned & Operated HVAC Services in Charleston, SC, proudly serving the Charleston community for 39 years.

Recent Posts

How Much Does a Heat Pump Cost in South Carolina?

In the diverse climate of South Carolina, maintaining a comfortable home environment year-round is a priority for homeowners. Heat pumps are a popular choice in our region thanks to their versatility and efficiency. Unlike traditional HVAC systems, heat pumps offer a...

How Does an AC Work?

Air conditioning, a technology that has reshaped our environments and lifestyles, originates from Willis Haviland Carrier's 1902 invention. Initially designed to control humidity in a printing plant, it has since become a staple of comfort in homes and businesses...

How Long Does a Furnace Last?

Understanding the lifespan of your home's furnace is crucial for maintaining a comfortable and cost-effective living environment. Many factors, including installation quality, maintenance frequency, and daily operation influence a furnace's longevity. By grasping...

How to clean an AC unit

Maintaining your air conditioning unit isn't just a task; it's an investment in comfort, efficiency, and the system's longevity. Regular AC maintenance ensures that your unit operates at peak performance, especially when you need it most. Keeping your AC clean fosters...

AC Unit Size Guide: Ton to Square Feet

As summer temperatures soar, the importance of a well-functioning air conditioning (AC) unit becomes increasingly evident. However, the effectiveness of your AC isn't just about how cold it can make a room; it's also about how efficiently it can do so. One of the most...

You might also like…