1. Ensure that the chimney is installed vertically: if the chimney is not installed vertically, the smoke emission will not be smooth, which will affect the smoke exhaust effect. Therefore, when installing the chimney, it must be vertical, so that the smoke can be discharged smoothly.

2. Chimney installation should be sealed: Chimney installation should be sealed to prevent air leakage and cold air from entering. If the chimney is not sealed, it will lead to flue gas backflow and heat loss, which will affect the efficiency of the furnace.