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

The maximum horizontal length for a single-wall vent connector is determined by the need to maintain proper draft and ensure safe operation of the venting system. Regulations and standards typically state that the maximum horizontal run should not exceed 75% of the chimney height to facilitate effective exhaust of combustion gases.

This limit is crucial because extending the vent connector too far horizontally can lead to issues with backdrafting or inadequate venting, which could result in dangerous situations such as the accumulation of carbon monoxide. By adhering to the 75% guideline, technicians help ensure that the combustion products are safely and efficiently expelled through the chimney, maintaining optimal performance of the system and protecting occupant safety.

Other options, which suggest longer horizontal lengths, could compromise draft quality and increase the risk of system malfunction. Therefore, the choice of a maximum length of 75% of the chimney height is both a safety measure and a best practice in venting design.