For two ovens, each rated at 80,000 Btus, what size vent pipes are required if the roof height is 10 feet?

For two ovens rated at 80,000 Btus each, the total BTU requirement is 160,000 Btus. When calculating the required size of the vent pipes, considerations such as the total BTUs, the height of the vent, and local building codes must be taken into account.

In this scenario, common practice for vent sizing involves looking at the total input of the appliances and following established guidelines or tables that specify necessary pipe diameters based on various factors, including the number of appliances and their combined output.

The correct choice suggests using a 5-inch diameter for the connectors leading to the vent and a 6-inch diameter for the common vent. This sizing is appropriate because the 5-inch connectors can effectively handle the flow from both 80,000 BTu ovens without causing excessive back pressure or hindering exhaust, while the 6-inch diameter for the common vent provides enough capacity for the total exhaust of 160,000 Btus, allowing for proper ventilation and efficient operation of the ovens.

The other options might underestimate or overestimate the necessary pipe sizes given the BTU output and height of the vent, potentially leading to inefficient operation or safety concerns. Proper vent sizing is critical in commercial kitchen settings to ensure safe and effective removal