What is required if a furnace and a water heater must vent into an inadequate chimney flue?

When dealing with the issue of a furnace and a water heater venting into an inadequate chimney flue, implementing a priority control is essential to ensure safety and efficiency. Priority control allows for the proper management of appliance operation to prevent backdrafting and ensure that exhaust gases are effectively vented.

In scenarios where multiple appliances share a venting system, it is crucial to prioritize the operation of the system to prevent hazardous conditions. For example, by controlling which appliance operates first or simultaneously, priority control minimizes the risk of flue gas spillage, helping to maintain safe venting practices and ensuring that combustion products are adequately expelled from the living space.

This approach also enables compliance with safety codes, which emphasize the need to mitigate risks when appliances share a venting system. By using priority control mechanisms, the operation of the furnace and water heater can be synchronized in a way that maintains safe and effective inline performance, preventing any insufficient venting scenarios that could arise from inadequate chimney flue conditions.