For ease of ventilation, which elbow is recommended over a 90 degree elbow in connector pipes?

A 45 degree elbow is recommended over a 90 degree elbow in connector pipes, particularly for ease of ventilation, because it allows for a smoother transition of the flue gases. The less abrupt angle of the 45 degree elbow facilitates a more gradual change in direction, reducing turbulence and resistance within the flue system. This results in improved airflow and enhances the efficiency of the venting system.

Using a 90 degree elbow often creates a significant change in direction that can lead to increased pressure and potential buildup of combustion byproducts. Therefore, when venting appliances, selecting a 45 degree elbow ensures that the exhaust is expelled with less back pressure, promoting better airflow and reducing the risk of venting issues.

While options such as 30, 15, and 60 degree elbows may also provide some benefits, the 45 degree elbow strikes an optimal balance for facilitating effective ventilation in many heating appliance installations.