How much must a boiler horizontal vent rise per foot?

The correct answer, which states that a boiler horizontal vent must rise at least 1 inch per foot, is based on industry standards and guidelines for maintaining proper venting for gas appliances. This rise is essential to ensure that exhaust gases are effectively expelled from the building and to prevent back-drafting, which could lead to dangerous carbon monoxide buildup.

A vent rise of 1 inch per foot helps in promoting adequate airflow and allows the natural draft to assist in moving the exhaust upwards through the venting system. This rise contributes to better appliance performance and diminishes the likelihood of condensation issues within the vent, which can result in corrosion or blockages over time.

Adhering to this requirement is critical for ensuring that the boiler operates safely and efficiently, in compliance with local building codes and manufacturer specifications. This regulation supports both safety and energy efficiency in heating system operation.