True or False: The space surrounding a chimney liner can be used to vent an existing appliance.

The statement is false because the space surrounding a chimney liner is not suitable for venting an existing appliance. Chimney liners are designed to provide a safe and efficient pathway for exhaust gases from a heating appliance to escape outside, while also protecting the structure of the chimney and preventing heat transfer to surrounding materials. When venting appliances, it is critical to ensure that the venting system is properly sized and installed according to manufacturer specifications and local building codes.

Using the space around a chimney liner for venting can lead to a number of issues, such as insufficient draft, potential fire hazards, and the possibility of carbon monoxide backdrafting into the living space. Proper ventilation is essential for safety and efficiency, making it important to adhere to established guidelines and standards regarding venting appliances.