Variable Speed vs. Non-Variable Speed Furnaces: Which is Right for My Home?

Choosing the right furnace for your home is an important decision, especially in the Minneapolis and St. Paul areas where winters can be downright frigid!

When shopping for a new furnace, you might come across two main types: variable-speed furnaces and non-variable-speed furnaces. Both can heat your home effectively, but the technology in variable-speed furnaces offers several advantages that set them apart.

What is a Variable Speed Furnace?

A variable-speed furnace refers to the furnace’s ability to adjust its blower motor speed based on the heating demands of your home. Unlike non-variable speed furnaces, which run at one constant speed, variable speed units can slow down or speed up to meet the required comfort levels. This adjustment allows for more precise control over airflow and temperature, ultimately improving efficiency and comfort.

What is a Non-Variable Speed Furnace?

A non-variable speed furnace, also known as a single-speed furnace, operates with a fixed-speed blower motor. When the furnace is turned on, the blower motor works at full capacity, regardless of whether the home needs that level of heating. Once the temperature is reached, the furnace shuts off, only to cycle back on when more heat is needed. While reliable and less expensive upfront, non-variable furnaces are less efficient and provide fewer comfort benefits.

Advantages of Variable Speed Furnaces

• Energy efficiency: One of the most significant advantages of variable speed furnaces is their energy efficiency. Unlike non-variable furnaces, which use full power every time they run, variable speed furnaces can adjust their blower speed to use only the energy necessary to maintain your home’s temperature. This means the furnace doesn’t have to work as hard, reducing overall energy consumption. Because the furnace operates at a lower capacity when full power isn’t required, it uses less electricity or gas, saving homeowners money on their energy bills.
• Improved indoor comfort: Variable speed furnaces are designed to provide a more consistent and comfortable indoor environment. With non-variable furnaces, the temperature in your home can fluctuate as the furnace turns on and off, creating hot and cold spots. In contrast, a variable speed furnace gradually ramps up or down to maintain a steady temperature, ensuring even heat distribution throughout your home.
• Fewer temperature swings: Because the furnace can adjust its speed to match the home’s heating needs, you’ll avoid the drastic temperature changes often associated with non-variable furnaces. These furnaces continuously circulate air, even when they are not actively heating, which helps keep indoor temperatures more consistent.
• Quieter operation: If you’ve ever been startled by the sudden noise of a furnace turning on, you’ll appreciate the quiet operation of a variable speed furnace. These furnaces start at lower speeds and gradually increase, preventing the loud whooshing noise that’s common with single-speed furnaces. Variable speed furnaces are quieter because they don’t suddenly blast air into your home. Instead, they ramp up slowly and maintain a consistent, lower noise level throughout operation.
• Better air quality: Indoor air quality is an important consideration for homeowners, particularly during Minnesota’s winter months when homes are sealed tight. A variable speed furnace can help improve air quality by running the blower at a low speed even when the furnace isn’t actively heating. This continuous airflow means your furnace is constantly circulating air through the filter, reducing dust, allergens, and other contaminants.
• Advanced technology and smart features: Many variable speed furnaces come equipped with modern technology and smart features that allow for even greater control over your home’s heating system. For example, some models can be integrated with smart thermostats that allow homeowners to set heating schedules, monitor energy usage, and control the system remotely via smartphone apps. If you have a smart thermostat, you can fully optimize the performance of your variable speed furnace by adjusting temperature settings and energy-saving modes from your phone.

Non-Variable Speed Furnaces: Are There Any Advantages?

Although variable speed furnaces offer numerous advantages, non-variable speed furnaces do have their place in the market, especially for homeowners on a tight budget.

• Lower upfront cost: Non-variable speed furnaces are typically less expensive to purchase and install, making them a more affordable option for homeowners who don’t require the enhanced features and benefits of a variable speed furnace.
• Simple and reliable: For those who prefer straightforward systems with fewer components, non-variable speed furnaces offer reliable heating without the complexity of additional technology. However, it’s essential to weigh these factors against the long-term savings, comfort, and efficiency benefits that variable speed furnaces can provide.

The verdict on variable speed vs. non-variable speed furnaces?

In the cold climate of Minnesota, having a dependable and efficient heating system is crucial. While non-variable speed furnaces are a budget-friendly option, the advantages of variable speed furnaces make them a wise long-term investment. From energy efficiency and quieter operation to improved indoor air quality and comfort, variable speed furnaces provide superior performance in almost every way.

If you’re considering a furnace replacement or upgrade, a variable speed furnace can offer you the comfort, savings, and peace of mind you need during those cold Minnesota winters. Contact Furnace Doctors today for a free in-home estimate to see if a variable speed system is right for your home.