How many screws must each joint of the chimney connector be fastened with at a minimum?

Each joint of the chimney connector must be fastened with a minimum of three screws to ensure a secure and safe assembly. This requirement is based on safety standards and regulations which aim to prevent disconnections due to the movement of the connector or the expansion and contraction that occurs with temperature changes. Using three screws provides adequate stability and reduces the risk of leaks or failures that could lead to hazardous situations, such as the release of carbon monoxide or the risk of fire. It demonstrates compliance with established safety regulations, helping to ensure that the heating system operates effectively and safely.