Comparing Furnace Types in Comfort, Savings, Noise, & Cost

Want to know more about which furnace to choose for your home? Single stage, 2 stage, and modulating furnaces each offer different advantages and disadvantages. Let's break down how they compare in key areas like comfort, energy savings, noise levels, and initial cost.

Comfort Comparison

Winner: Modulating Furnace

The modulating furnace takes the lead here. The best part? It can tailor its heat output to precisely what your home needs. When you first turn it on during a cold spell, it operates at its peak to quickly heat your home. After that, it runs at lower levels to maintain comfort—no wild temperature swings like you'd get with a single stage furnace.

Runner-Up: 2-Stage Furnace

The 2-stage furnace isn't as flexible as a modulating furnace but is a significant improvement over a single stage furnace. On milder days, it runs at a lower, energy-efficient setting, reducing temperature fluctuations in your home.

Last Place: Single Stage Furnace

Single stage furnaces are less versatile and are best suited for warmer climates like Florida and Texas where high heating performance isn't as critical.

Energy Savings

Winner: Modulating Furnace

The modulating furnace shines in energy efficiency as well. Its ability to adapt its heat and fuel consumption can reduce your gas and electric bills by up to 30-40% compared to a standard single stage furnace.

Runner-Up: 2-Stage Furnace

The 2-stage furnace again holds the second position. Generally, these furnaces have an Annual Fuel Utilization Efficiency (AFUE) of 92% or higher. This could save you hundreds of dollars annually on your heating bills.

Last Place: Single Stage Furnace

For those in warmer climates, the single stage replacement furnace may be sufficient. However, it's not advisable for colder regions where energy costs can quickly add up.

Noise Levels

Winner: Modulating Furnace

In the area of noise, the modulating furnace barely edges out the 2-stage furnace, especially when running on lower settings.

Runner-Up: 2-Stage Furnace

The 2-stage furnace, particularly when equipped with a variable speed blower, is generally quiet during its low-stage operation, which occurs about 80% of the time.

Last Place: Single Stage Furnace

The single stage furnace is not as quiet as its competitors but still quieter than older models.

Initial Cost

Winner: Single Stage Furnace

When it comes to initial costs, the single stage furnace is the most affordable option.

Runner-Up: 2-Stage Furnace

Expect a mid-range price for a 2-stage furnace, which is still a decent investment considering its features.

Last Place: Modulating Furnace

The modulating furnace, while the most expensive upfront, could save you more in the long run, especially in colder climates where heating demands are higher.