Which of the following is NOT a characteristic of Type B vents?

Type B vents are specifically designed for venting gas appliances and have unique characteristics that set them apart from other venting options. One key aspect of Type B vents is that they are typically able to handle high temperatures safely due to their construction, which often includes a double-walled system that provides insulation and minimizes heat transfer.

The correct choice highlights that they are not typically used for high temperature applications in the sense that they are specifically designed for draft hoods in gas appliances, which do not generally operate at the same high temperatures as some other vent systems used for different fuel types or applications, such as wood stoves or boilers.

In contrast, the characteristics of Type B vents also include their double-walled structure that helps in maintaining safe operating temperatures and preventing condensation. They are indeed listed for limited residential use but are not meant for appliances that produce extremely high temperatures, as might be the case with non-gas appliances. Therefore, understanding the intended application and operational limits of Type B vents is essential when determining their proper use in residential settings.