True or False: A fuel-burning appliance can share exhaust with another appliance.

The assertion that a fuel-burning appliance can share exhaust with another appliance is false. Fuel-burning appliances, such as gas furnaces, water heaters, and boilers, must typically have dedicated venting systems that safely exhaust combustion gases outside of a building. The reason for this requirement is to prevent the potential backdraft of harmful gases, such as carbon monoxide, from one appliance into another or into the living space.

Shared exhaust systems can create dangerous conditions, especially if one appliance operates under negative pressure or during certain operation cycles. By maintaining separate exhausts, each appliance can effectively expel combustion byproducts without interference or risk of contamination. Additionally, building codes and manufacturer instructions often explicitly prohibit shared venting to ensure safety and proper operation.

This clarity on venting requirements reinforces the importance of adhering to codes and standards in HVAC practices, ensuring both safety and compliance in installation and maintenance procedures.