What does a modulating furnace do?

A modulating furnace is designed to vary its heat output in response to the heating demands of the space it serves. This means it can adjust its output anywhere between 40% and 100% of its total capacity, allowing for more precise temperature control and improved energy efficiency.

By modulating the heat output rather than simply turning on or off, these furnaces can maintain a more consistent indoor temperature and avoid the temperature swings that can occur with on/off operation. This results in better comfort levels and reduced energy consumption since the furnace only works as hard as needed to maintain the desired temperature.

Additionally, their ability to adjust output helps to reduce wear and tear on the system, leading to potential longevity benefits and lower maintenance costs over time. This modulation capability is an important feature in high-efficiencyHVAC systems and contributes to more sustainable energy use.