Type B vent connectors have a maximum run of what percentage of vertical rise?

Type B vent connectors are designed for venting gas appliances and have specific requirements in terms of installation to ensure safety and efficiency. The correct answer states that Type B vent connectors can have a maximum run of 100% of the vertical rise. This means that for every vertical inch of rise, you can have an equal horizontal run of vent connector.

This ratio is important for maintaining proper draft and ensuring that gases can efficiently escape from the appliance. If the horizontal run were to exceed this limit, it could lead to inadequate venting, potentially causing backdrafts and unsafe operating conditions for gas appliances.

The guidelines are set to promote safe operation, which is why adhering to this 100% ratio is crucial. The installation must consider these parameters to conform to safety codes and manufacturer instructions, thus preventing hazardous conditions in a building.