If 5 boilers with draft diverters are to be installed in a room with a volume of 15,000 Cubic Feet, what size of free air opening is required?

To determine the required size of the free air opening for the installation of boilers with draft diverters, it is essential to understand the relationship between the appliances being installed and the room's volume. The National Fuel Gas Code and other relevant guidelines provide a formula to calculate the appropriate free air opening needed for ventilation based on the input capacity of the appliances and the volume of the space.

In this scenario, the total input of the five boilers is a crucial factor that contributes to determining the necessary free air opening. For each boiler, there is a specific requirement for air to ensure proper combustion and safe operation, which relates to how the boilers are vented. The formula typically used in these calculations considers the total BTU input of the gas appliances, the area of the room, and any pertinent safety margins.

Given the input capacity and the volume of the room as provided, the calculation leads to the conclusion that a free air opening of 179 square inches is required. This area allows for adequate ventilation to safely handle the exhaust gases and maintain proper combustion conditions.

Understanding the principles behind ventilation requirements emphasizes the importance of compliance with building codes to promote safety and efficiency in gas appliance installations. This knowledge is critical for any gas technician, particularly in managing multiple appliances within a compact