InterNACHI Heating, Ventilation, and Air Conditioning (HVAC) Practice Exam

The statement is true. Oil furnace vent connectors are subject to high temperatures and the expansion and contraction of the materials can lead to looseness over time. This can happen due to several factors, including vibration from the furnace operation, thermal cycling, and the mechanical wear of the components. It's important for the vent connectors to be securely fastened to ensure proper ventilation of exhaust gases. Loose connectors can not only impair the efficiency of the furnace but also pose serious safety risks, such as the potential for carbon monoxide leakage into the living space. Regular maintenance checks are essential to ensure that these connectors remain tight and in good condition, mitigating risks associated with improper venting.