Single wall vent connectors:

Single wall vent connectors should not pass through floors, ceilings, or roofs due to safety considerations related to the potential for heat transfer and fire hazards. When a single wall vent connector is installed, it can reach high temperatures, and if it passes through combustible materials, it poses a significant risk of igniting those materials, leading to possible structural fires.

The design and code regulations are aimed at ensuring safety by preventing direct contact between high-temperature venting systems and combustible structures. Therefore, keeping single wall vent connectors entirely within an unoccupied space or using alternative venting systems that meet safety codes is crucial for preventing dangerous conditions. This guidance ensures compliance with safety standards and protects life and property from fire hazards associated with improper venting practices.