1, a single flue type: a rectangular pipe, the pipe straight through each layer, leaving an inlet in the room to connect the hood line.

2, variable pressure type: in the installation, each layer of the flue is designed to be a different cross-section, and then the airflow of the smoke upwards good.

3, non-return valve type: in the single pipe flue on the air inlet, with an enclosure with the non-return valve, so as to prevent the airflow retrograde.

Villa Master provides you with local house building policy, house building drawings, villa design drawings;

Villa appearance effect drawing service, thousands of explosive red drawings for you to choose: www.bieshu.com?bdfc