In a gas furnace, what is the starting point for maintaining safe operation regarding venting?

The starting point for maintaining safe operation regarding venting in a gas furnace is ensuring the minimum distance from combustibles. This is crucial because gas furnaces produce heat and exhaust gases that can ignite nearby materials if they are placed too close. By adhering to the minimum distance guidelines, you help prevent potential fire hazards and ensure the safe operation of the furnace.

While maximum gas pressure, temperature of the exhaust gases, and type of gas used are all important factors in the operation of a gas furnace, they pertain more to efficiency, performance, and safety during operation rather than the initial safety measures related to venting. Establishing and maintaining appropriate distances from combustible materials helps create a safe environment where the furnace can operate without risk of combustion of surrounding materials.