What is the purpose of a combustion blower in a furnace system?

The purpose of a combustion blower in a furnace system is to ensure an adequate supply of fresh air and combustion air flow through the heat exchanger. This is crucial for efficient and effective combustion of the fuel, be it natural gas, propane, or oil, as it increases the furnace's ability to generate heat.

The combustion process requires a specific air-to-fuel ratio to ensure proper burning, which in turn affects the system’s efficiency and its emissions. By moving fresh air into the combustion chamber, the blower helps achieve the optimal conditions for combustion. This not only enhances performance but also supports safety by preventing the buildup of harmful gases that could otherwise escape into the living space.

In contrast, while circulating air throughout the house, exhausting waste gases, and reducing noise levels may be functions related to the overall operation of a heating system, they do not capture the specific role of the combustion blower, which is focused on facilitating the combustion process itself.