How much does electric heat cost compared to gas?

Electric Heat vs Gas Heat Cost An Overview

When homeowners in regions where both natural gas and electricity are available consider their heating options, a primary concern is invariably cost. The question of how much electric heat costs compared to gas heat is complex, with numerous factors influencing the final figures. While a definitive, one-size-fits-all answer is elusive, it’s possible to provide a clear understanding of the relative costs by examining the underlying economics, efficiency differences, and regional price variations.

Generally speaking, in most parts of the United States and Canada, **natural gas heating is typically more cost-effective on an operational basis than electric resistance heating.** However, this is a broad generalization, and several critical nuances can shift the balance. We’ll delve into these details to give you a comprehensive picture.

Understanding Energy Units and Equivalencies

To compare the cost of different energy sources, it’s essential to understand how their energy content is measured and how much each unit of energy costs. The primary unit for natural gas is the therm, which represents 100,000 British Thermal Units (BTUs). Electricity is measured in kilowatt-hours (kWh), where 1 kWh is equivalent to approximately 3,412 BTUs.

To directly compare gas and electricity costs, we need to determine the cost per BTU. For example, if natural gas costs $1.20 per therm and electricity costs $0.15 per kWh, we can calculate:

• Cost per BTU for gas: $1.20 / 100,000 BTU = $0.000012 per BTU
• Cost per BTU for electricity: $0.15 / 3,412 BTU = $0.000044 per BTU

In this hypothetical scenario, electricity is significantly more expensive per BTU than natural gas. This fundamental price difference is a major driver behind the cost differential. However, efficiency plays a crucial role, which we will explore next.

Efficiency Matters

The efficiency of a heating system refers to how much of the energy consumed is converted into usable heat. This is where the comparison becomes more nuanced, especially when considering different types of electric heating.

Electric Resistance Heating

Electric resistance heaters, such as those found in baseboard heaters or electric furnaces, are virtually 100% efficient at converting electricity into heat. This means that almost every watt of electricity used produces heat. While this 100% efficiency sounds appealing, it’s important to remember that the cost per BTU of electricity, as shown above, is often considerably higher than natural gas.

Heat Pump Systems

Heat pumps operate on a different principle. Instead of generating heat directly, they move existing heat from one place to another. In the winter, they extract heat from the outside air (even very cold air contains heat) and transfer it indoors. In the summer, they reverse the process to provide cooling.

Heat pumps are rated by their Seasonal Energy Efficiency Ratio (SEER) for cooling and Heating Seasonal Performance Factor (HSPF) for heating. HSPF measures how much heat a heat pump delivers for each unit of electricity consumed. A typical HSPF of 8 to 10 means that for every unit of electricity used, a heat pump can deliver 8 to 10 units of heat. This is often referred to as being 200% to 300% efficient, or even higher in milder climates.

This higher efficiency can sometimes make heat pumps competitive with, or even cheaper than, gas heating in certain regions, especially those with milder winters and relatively high natural gas prices. However, as temperatures drop significantly, the efficiency of air-source heat pumps can decrease, and they may require supplementary electric resistance heat, which is less efficient and more expensive.

Natural Gas Furnaces

Natural gas furnaces are not 100% efficient. Older models might have efficiencies of 60-80%, meaning a significant portion of the heat produced is lost up the chimney. Modern high-efficiency condensing furnaces, however, can achieve efficiencies of 90-98% or even higher. These units extract additional heat from the exhaust gases by condensing them into water, recouping energy that would otherwise be wasted.

Regional Price Differences

The crucial determinant in the cost comparison is the price of energy in your specific location. Natural gas prices can vary significantly by state and even by utility provider. Similarly, electricity rates fluctuate widely based on generation sources, grid infrastructure, and local regulations.

Generally:

• Areas with low natural gas prices and high electricity prices: Natural gas heating will almost always be cheaper.

• Areas with high natural gas prices and moderate electricity prices: Electric heating, particularly heat pumps, can become competitive or even cheaper.

• Regions with extreme cold: Even if natural gas prices are moderate, the reliance on supplementary electric heat for heat pumps during harsh winters can make them more expensive to operate than a gas furnace. Natural gas furnaces also tend to perform more consistently in very cold temperatures.

It’s essential to check the current average prices for therms of natural gas and kilowatt-hours of electricity from your local utility providers. These figures are usually available on their websites or by calling them directly.

Installation and Maintenance Costs

Beyond the cost of fuel, initial installation and ongoing maintenance expenses also factor into the total cost of ownership.

Electric Resistance Heating

• Installation: Electric resistance systems, like baseboard heaters, are generally the cheapest to install. Electric furnaces are also typically less expensive to install than gas furnaces or heat pumps.
• Maintenance: Maintenance is minimal for electric resistance heaters. There are no combustion byproducts to manage (like carbon monoxide, a significant safety concern with gas appliances), and fewer moving parts.

Heat Pumps

• Installation: Heat pumps have a higher upfront cost than electric resistance systems and are often comparable to or more expensive than gas furnaces, especially for high-efficiency models. The complexity of installation, including refrigerant lines and outdoor units, contributes to this cost.
• Maintenance: Heat pumps require regular maintenance, similar to air conditioners, including cleaning coils and checking refrigerant levels. This is crucial to ensure optimal efficiency and longevity.

Natural Gas Furnaces

• Installation: Gas furnaces are generally less expensive to install than heat pumps but more expensive than electric resistance systems. They require a gas line connection, venting for exhaust gases (which, if not properly installed and maintained, can lead to dangerous carbon monoxide leaks), and often a condensate drain for high-efficiency models.
• Maintenance: Gas furnaces require annual professional maintenance to ensure safe and efficient operation. This includes checking for gas leaks, inspecting the heat exchanger for cracks (another potential source of carbon monoxide), cleaning burners, and testing safety controls.

Safety Considerations

When comparing heating systems, safety is paramount. Both natural gas and electricity carry inherent risks if not handled properly.

• Natural Gas: The primary safety concern with natural gas is the risk of carbon monoxide poisoning and gas leaks. Carbon monoxide is an odorless, colorless gas produced by incomplete combustion, and a faulty or poorly ventilated gas furnace can be a deadly hazard. Prompt leak detection is also critical to prevent fires and explosions. Ensure your gas furnace is professionally installed, regularly inspected, and equipped with functioning carbon monoxide detectors in your home.

• Electricity: While less prone to catastrophic leaks or explosions, high-voltage electrical systems, especially those powering heating equipment, pose risks of electric shock and fire if damaged or improperly wired. Electric furnaces and heat pumps involve complex electrical components and should only be serviced by qualified electricians or HVAC technicians.

Making the Right Choice for Your Home

The decision between electric and gas heating often comes down to a balance of upfront costs, ongoing operational expenses, local energy prices, and the climate in your region. Given the typical cost of energy, natural gas is often the more economical choice for heating homes in areas with cold winters.

However, the efficiency of heat pump technology has made them a strong contender, especially in milder climates or where natural gas infrastructure is not available or is prohibitively expensive. If your electricity rates are reasonable and your winters are not severe, a heat pump could offer comparable or even lower operating costs than gas, with the added benefit of efficient cooling in the summer.

To get the most accurate comparison for your specific situation, it is highly recommended to consult with local HVAC professionals. They can assess your home’s heating needs, evaluate your existing infrastructure, and provide quotes for different system installations. They can also help you understand the current energy costs in your area and project annual operating expenses.

Connecting with a Professional

Determining the most cost-effective and efficient heating solution for your home can be a complex process, influenced by a multitude of factors including local energy prices, climate conditions, and the specific capabilities of different heating systems. To get personalized advice and accurate cost estimates tailored to your home, connecting with experienced local HVAC and heating professionals is the best course of action.

EZ Home Heating is a free nationwide service that simplifies this process. We connect homeowners like you with independent local HVAC and heating professionals in your area. EZ Home Heating does not perform the work itself; our service is solely focused on facilitating free connections to qualified local experts who can provide the information and services you need to make an informed decision about your home’s heating system.

Call today to get connected with a local pro.