What is the maximum horizontal length allowed for a single-wall vent connector?

The maximum horizontal length allowed for a single-wall vent connector is determined by various safety codes and regulations to ensure proper venting of combustion gases. The correct answer indicates that this maximum length is set at 75% of the chimney height. This limit is important for several reasons: it helps maintain adequate draft in the chimney, reduces the likelihood of condensate buildup, and minimizes the risk of backdrafting, which could lead to dangerous conditions, including carbon monoxide infiltration into living spaces.

By restricting the horizontal run to 75% of the chimney height, the design ensures that the vent connector remains efficient and effective in directing exhaust upwards and out of the building, allowing for safe and proper operation of the heating appliance connected to the venting system.