What is the implication of having a "loose" construction in a home regarding combustion air?

Having a "loose" construction in a home means that the building structure is not tightly sealed, resulting in gaps and openings that can lead to increased air exchange with the outside environment. This condition is particularly relevant when considering combustion appliances, which need a sufficient supply of combustion air to operate safely and efficiently.

When the construction is loose, it allows for combustion air to be drawn in from unconfined spaces, like attics or even the outdoors. This is advantageous because it provides the necessary oxygen for combustion processes without putting additional strain on indoor air quality by relying solely on air from confined spaces, such as tightly sealed rooms that might lack adequate airflow.

This ability to bring in combustion air from outside or other unconfined areas helps ensure that gas appliances can operate effectively, reducing the risk of incomplete combustion that leads to the production of harmful gases like carbon monoxide. Thus, the loose construction effectively supports the requirement for adequate combustion air supply, keeping both safety and efficiency in mind.