How to set up the chimney of hotel gas boiler

The gas boiler uses a burner, which is forced to blow smoke, so the chimney of the gas boiler does not need to be too high. Generally, the chimney of vertical gas-fired boiler is about 1 m higher than that of boiler room, and the horizontal gas-fired boiler needs to be more than 5 meters higher than that of boiler room because of the long flue gas flow.