The vent connector should slope ______ going away from the furnace at a minimum of _____ per foot.

The correct answer emphasizes that the vent connector should slope upward as it moves away from the furnace, with a minimum slope of 1/4-inch per foot. This upward slope is crucial because it allows for proper drainage of any condensate that may form within the vent connector, preventing moisture from accumulating and potentially causing issues such as corrosion or blockage.

Additionally, maintaining this slope ensures that combustion gases can effectively rise and exit the heating system, promoting safe operation and reducing the risk of backdrafting. When the connector is angled appropriately, it supports the efficient venting of flue gases, which is necessary for both safety and the effective performance of the HVAC system.

Understanding the design and function of vent connectors is essential for maintaining safe HVAC installations and ensuring that they operate as intended.