What is a primary advantage of using a sealed combustion furnace?

A primary advantage of using a sealed combustion furnace is the reduced risk of carbon monoxide leaks. This type of furnace draws air from the outside for combustion and exhausts the combustion gases back outside, creating a sealed environment. This design minimizes the chances of carbon monoxide—which can be deadly—entering the living space of a home.

Unlike conventional systems that draw air from inside the home for combustion, sealed combustion systems mitigate the risk of backdrafts or leaks, where harmful gases could potentially infiltrate the home. This makes them especially advantageous in tightly constructed homes where air exchange is limited.

The other options, while they may be benefits in certain contexts, do not specifically highlight the core advantage of sealed combustion systems related to safety and indoor air quality, which is ultimately the most significant factor in selecting such a system.