Very good fan for its price. The sound produced by the rotation is not heard when the furnace is running.. Very well made. Tested at slightly higher fire and everything is Ok. There is little airflow that occurs at high fire weak, perhaps with 2 blades was more effective

Very good fan for its price. The sound produced by the rotation is not heard when the furnace is running.. Very well made. Tested at slightly higher fire and everything is Ok. There is little airflow that occurs at high fire weak, perhaps with 2 blades was more effective

Very good fan for its price. The sound produced by the rotation is not heard when the furnace is running.. Very well made. Tested at slightly higher fire and everything is Ok. There is little airflow that occurs at high fire weak, perhaps with 2 blades was more effective

cheap fan . small blades

cheap fan . small blades

cheap fan . small blades