Where are single wall vent connectors prohibited?

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Single wall vent connectors are prohibited in attics and excessively cold areas primarily due to safety and efficiency concerns.

In attics, the primary reason for this prohibition is the risk of fire. Single wall connectors can become very hot during operation, and if they come into contact with combustible materials in an attic space, it can lead to a fire hazard. Attics often contain insulation and wooden structural elements that could be easily ignited by high temperatures.

In excessively cold areas, the concern relates to condensation and the potential for corrosion. Single wall vent connectors are not designed to maintain the necessary heat within the flue gases as they travel through very cold environments. This can result in condensation forming inside the vent, which can create water damage, promote corrosion of the vent connector, and potentially cause toxic gases such as carbon monoxide to leak into the home.

Thus, prohibiting single wall vent connectors in both attics and excessively cold areas is a safety measure to prevent fires and ensure the integrity of the venting system. This understanding helps in adhering to building codes and ensuring safe installation practices for venting appliances.

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