What is the best method to prevent infiltrating air into a home?

The most effective method to prevent infiltrating air into a home is isolating combustion air. This approach focuses on controlling the air supply needed for combustion appliances, ensuring that outside air does not enter the living space through unintentional means. By properly isolating combustion air, you enhance the overall air quality inside the home and prevent moisture and pollutants from entering alongside cold air.

When combustion air is isolated, it typically comes from a designated source outside the living space that can provide enough air for the appliance to operate safely and efficiently. This method helps maintain consistent indoor temperatures and reduces energy loss caused by drafts.

While sealing windows, installing double doors, and using heavy curtains may seem practical for improving insulation and reducing drafts, they do not address the problem of combustion air directly. These methods can limit infiltration in certain contexts but do not effectively manage the specific air requirements for combustion and may result in other issues, such as reduced air quality or potential backdrafting in appliances. Thus, isolating combustion air is a more comprehensive approach to preventing unintended air infiltration.